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

Abstract

The invention relates to a heating circuit hydraulic module (22.1) for a central heating system (1), a branch flow circuit hydraulic module (22.2) for a central heating system (1), a universal housing (23) for hydraulic modules (22.1, 22.2) usable in central heating systems (1), and an associated central heating system (1), wherein the central heating system (1) comprises at least one primary heat source (2), at least one electrically operated heat pump (3), at least one water-to-air heat exchanger (4), in particular at least one domestic hot water storage tank (5), and a piping system (7) with a heat exchanger inlet line (L). WT , zu ), a heat pump supply line (L WP, zu ) and a heat pump drain line (L WP, ab ) exhibits. The manufacture and / or assembly of the heating circuit hydraulic module (22.1), the branch flow circuit hydraulic module (22.2), the universal housing (23), and the central heating system (1) is simplified by the heating circuit hydraulic module (22.1) having 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 by the branch flow circuit hydraulic module (22.2) having a branch flow circuit hydraulic module housing (22.2.G) wherein corresponding components are formed and / or arranged in and / or on the branch flow circuit hydraulic module housing (22.2.G), and / or by at least two different configurations of pipes, connectors and / or valves can be formed using the universal housing (23).

Description

[0001] 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.

[0002] 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 inlet 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 inlet line. A heat pump inlet 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 inlet 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.

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

[0004] 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.

[0005] 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.

[0006] 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.

[0007] 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, the heat exchanger inflow line in sections, the heat pump inflow line in sections, the heat pump outflow line in sections 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.

[0008] 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 protected and advantageously also insulated by the heating circuit hydraulic module housing.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.

[0009] 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 aforementioned lines, 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] In the following, several special node areas are described in detail, whereby 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.

[0038] 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 region.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] According to a further alternative embodiment of the universal housing, a preferably curved section of the branch flow circuit discharge line and a - fluidically separated from the section of the branch flow circuit discharge line - preferably a curved section of the heat pump discharge line can be arranged in the third node area.

[0044] 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.

[0045] A preferably straight section of the bypass line can advantageously be arranged in a fourth node region.

[0046] 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, which is fluidically separated from the section of the branch flow circuit discharge line, can preferably also 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" each other without the fluids conveyed within the lines 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 fluidly 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] This minimizes the overall assembly effort required to set up the central heating system. This low assembly effort is also achieved by the fact that a particularly small number of components are required to create the piping system, such as the heating circuit 3-way connector, the heating circuit 3 / 2-way valve, the first 3-way connector, and the first 3 / 2-way valve. Nevertheless, the central heating system can be operated with minimized primary energy requirements, namely with minimized fuel requirements for the primary energy source.

[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.

[0055] 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.

[0056] 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 fluidly 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 fluidly connected to the primary heat source inflow line, in particular by means of a primary heat source 3 / 2-way valve.

[0057] In this way, the overall effort required to set up the piping system is minimized, as the necessary pipe connections between each other or with valves are kept as small as possible.

[0058] Advantageously, the branch flow circuit inflow line of the branch flow circuit is fluidly connected to the primary heat source outflow line and / or 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. The branch flow circuit outflow line of the branch flow circuit is fluidly connected to the primary heat source inflow line and / or connected to the primary heat source inflow line via the first 3-way connector and a third 3-way connector.

[0059] 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 inlet line with the primary heat source drain line and the primary heat source inlet 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 inlet line and fluidically connected to the branch flow circuit drain line and the branch flow circuit inlet line, respectively. This can be achieved with minimal manual effort.

[0060] 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.

[0061] In this case, when the primary heat source housing and the domestic hot water storage tank 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 tank housing are required.

[0062] 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, such 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, such 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.

[0063] 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 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] There are now numerous possibilities for advantageously designing and developing the heating circuit hydraulic module for a central heating system according to the invention, the branch flow circuit hydraulic module for a central heating system according to the invention, the universal housing for hydraulic modules usable in central heating systems according to the invention, 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: 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, Fig. 1b shows a schematic representation of the heating circuit hydraulic module or the branch flow circuit hydraulic module with the associated universal housing made of Fig. 1a in a three-dimensional view essentially of a respective back side, 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, Fig. 2b shows a schematic representation of the heating circuit hydraulic module according to the illustration in Fig. 2a but in contrast to Fig. 2a in a slightly three-dimensional view, Fig. 3a 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, Fig. 3b shows a schematic representation of the branch flow circuit hydraulic module according to the illustration in Fig. 3a but in contrast to Fig. 3a in a slightly three-dimensional view, Fig. 4a shows a schematic representation of the universal housing in a view of a front side, Fig. 4b shows a schematic representation of the universal housing made of Fig. 1a in a three-dimensional view essentially of a back side, Fig. 4c shows a schematic representation of the universal housing made of Fig. 1a in a slightly three-dimensional view, Fig. 5a in schematic representation only the basic body of the universal housing without components arranged here in a view of the parting plane, Fig. 5b in schematic representation only the cover of the universal housing without components arranged here in a view of the parting plane, Fig. 6a shows a schematic representation of the base body of the universal housing made of Fig. 5a in a three-dimensional view essentially of the parting plane, Fig. 6b shows a schematic representation of the cover of the universal housing made of Fig. 5b in a three-dimensional view essentially of the parting plane, 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 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.

[0073] Fig. 1a, Fig. 1b, Fig. 2a and Fig. 2b each show a heating circuit hydraulic module 22.1 for a central heating system 1.

[0074] The respective central heating system 1, whose respective hydraulic circuit diagram in Fig. 7a and Fig. 7b, comprises at least one primary heat source 2 operable with the aid of fuels, in particular a heating boiler and / or a gas boiler, at least one electrically operable heat pump 3, at least one water-air heat exchanger 4, preferably a heating element or a radiator for heating a building, in particular at least one domestic hot water storage tank 5, in particular a boiler, for the temporary storage of 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-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").

[0075] A heat transfer fluid 6, in particular water, can be heated by means of the primary heat source 2 and / or by means of the heat pump 3. With the aid of the pipe system 7 and with the aid of at least one pump 8, 9, 9b, in particular a heating pump 8 and / or a circulation pump 9 and / or a heat source pump 9b, the heat transfer fluid 6 can be conveyed for heating by the heat pump 3 and / or, in particular, for heating by the primary heat source 2. A heat exchanger inflow line L WT, zu of the pipe system 7 is fluidically connectable, connected and / or connected accordingly, 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, so that the heat transfer fluid 6 is supplied through the heat exchanger inflow line L WT , zu the water-air heat exchanger 4. A heat pump inlet line L WP, zuof the pipe system 7 is fluidically connectable, connected and / or connected accordingly, 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 WP, zu can be fed to the heat pump 3. A heat pump drain line L WP, ab of the pipe system 7 is fluidically connectable, connected and / or connected accordingly, 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 WP, ab can be supplied to the primary heat source 2.

[0076] The heating circuit hydraulic module 22.1 can already be included in 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 significant effort. The heating circuit hydraulic module 22.1 and the heat pump 3 are then preferably part of a so-called retrofit kit.

[0077] 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 the 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, sections of the heat exchanger inlet line L WT , zu , sectionally the heat pump inlet line L WP, zu , sectionally the heat pump drain line L WP, 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 WT , zu arranged, designed and / or interposed here and the heating circuit 3 / 2-way valve 21.H is in the heat pump inlet line L WP, zuarranged, 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 the Fig. 2a and Fig. 2b, via the bypass line L By fluidically connected to the heating circuit 3 / 2-way valve 21.H and / or connected accordingly.

[0078] A 3-way connector serves 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 realized through the 3 / 2-way valve. A 3 / 2-way valve can be switched to two switching positions for this purpose. 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.

[0079] 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.

[0080] 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, as viewed from the front. The third side 22.1.S3 then forms a top side of the heating circuit hydraulic module 22.1.

[0081] The 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 shows the heating circuit hydraulic module 22.1 and the branch flow circuit hydraulic module 22.2, which are identical when viewed from the outside. The respective central heating system 1, whose respective hydraulic circuit diagram is shown in Fig. 7a and Fig. 7ab, also has, to accommodate the branch flow circuit hydraulic module 22.2, at least one primary heat source 2 operable with the aid of fuels, in particular a heating boiler and / or a gas boiler, at least one electrically operable heat pump 3, at least one water-air heat exchanger 4, preferably a heating element or a radiator for heating a building, at least one domestic hot water storage tank 5, in particular a boiler, for the intermediate storage of domestic hot 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.

[0082] 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.

[0083] 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 the Fig. 3a, Fig. 3b, Fig. 7a and Fig. 7b, a - first - 3-way connecting piece 26.1, a - first - 3 / 2-way valve 21.1, in sections the heat exchanger inflow line L WT, zu , sectionally the heat pump drain line L WP, ab , in sections a branch flow circuit inflow line L SK, zu and in sections a branch flow circuit discharge line L SK, ab designed and / or arranged. The 3-way connector 26.1 is in the heat exchanger inlet line L WT, zu arranged, designed and / or interposed here. The 3 / 2-way valve 21.1 is in the heat pump drain line L WP, ab arranged, designed and / or interposed here.

[0084] 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.

[0085] By means of a branch of the 3-way connector 26.1 and a branch flow circuit discharge line L connected to this branch SK, ab and a branch of the 3 / 2-way valve 21.1 and a branch flow circuit inlet line L connected to this branch SK, zu is a branch flow circuit K AB of the piping system 7. The heat transfer fluid 6 is pumped through the branch flow circuit K by means of at least one pump 8, 9, 9b ABconveyable and with the help of the branch flow circuit K AB The domestic water 11 can be heated by the flowing heat transfer fluid 6.

[0086] 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.

[0087] 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 L SK, zu or the branch flow circuit drain line L SK, ab 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. 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.

[0088] 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, as viewed from the front. The third side 22.2.S3 then forms a top side of the branch flow circuit hydraulic module 22.2.

[0089] Fig. 1 to 7b each also show at least parts of a universal housing 23 for hydraulic modules 22.1, 22.2 that can be used in central heating systems 1. Fig. 4a to Fig. 4a show the universal housing 23 separately and in a closed state. Fig. 5a and Fig. 5b each show a part of one and the same universal housing 23 in an unfolded state. Fig. 6a and Fig. 6b each show a part of one and the same universal housing 23 in an unfolded state.

[0090] At least two different configurations of lines L WT , zu , L WP, zu , L WP, ab , L By , L SK, zu , L SK, 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 WT, zu , L WP, zu, L WP, ab , L By , L SK, zu , L SK, 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 is evident.

[0091] Such a configuration is in Fig. 2a or Fig. 2b and in Fig. 3a or Fig. 3b. Using the Fig. 2a and Fig. The heating circuit hydraulic module 22.1 is designed in the configuration shown in Figure 2b. By means of the Fig. 3a and Fig. The branch flow circuit hydraulic module 22.2 is designed in the configuration shown in Figure 3b.

[0092] The universal housing 23 has at least one recess structure 24 with several recess areas 24.K1 - 24.K4, 24.P for receiving lines L WT, zu , L WP, zu , L WP, ab, L By , L SK, zu , L SK, ab , connecting pieces 26.H, 26.1 and / or valves 21.H, 21.1, which in particular consist of Fig. 5a to Fig. 6b without such lines L WT , zu , L WP, zu , L WP, ab , L By , L SK, zu , L SK, ab , connecting pieces 26.H, 26.1 and / or valves 21.H, 21.1 can be seen. The recess structure 24 is thus formed 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. A continuous recess structure 24 / a continuous cavity is shown here. However, the formation of partially separated cavities and thus two or more recess structures would also be conceivable.

[0093] The recess structure 24 is at least partially designed as a negative form of the lines L that can be arranged in the recess structure 24. WT ,zu , L WP, zu , L WP, ab , L By , L SK, zu , L SK, 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 WT , zu , L WP, zu , L WP, ab , L By , L SK, zu , L SK, ab , 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.

[0094] The universal housing 23 comprises 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 negative mold is then formed, in particular, partly in the base body 23.1 and partly in the cover 23.2. Fig. 2a, Fig. 2b, Fig. 3a, Fig. 3b, Fig. 5a, Fig. 5b, Fig. 6a, Fig. 6b, Fig. 7a and Fig. 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 WT , zu , L WP, zu , L WP, ab , L By , L SK, zu , L SK, 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.

[0095] 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 the 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.

[0096] 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.

[0097] The recess structure 24 has a valve opening 24.V leading to the surroundings 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 oriented substantially perpendicular to the parting plane 23.T. The valve opening 24.V is formed in the cover 23.2.

[0098] 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 WP, ab , L SK, 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.

[0099] In particular, the recess structure 24 has the Fig. 5a, Fig. 5b, Fig. 6a and Fig. 6b, which are described below. However, it would also be conceivable to provide fewer or more than four node areas, depending on the desired configuration of the components to be arranged in and / or on the universal housing 23, such as the lines, valves, and / or connecting pieces.

[0100] A 3-way connector, in particular the heating circuit 3-way connector 26.H (cf. e.g. Fig. 2a and Fig. 2b) or the first - 3-way connector 26.1 (cf. e.g. Fig. 3a and Fig. 3b), can be arranged in a first node area 24.K1.

[0101] A 3 / 2-way valve, in particular the heating circuit 3 / 2-way valve 21.H (cf. e.g. Fig. 2a and Fig. 2b) or the first 3 / 2-way valve 21.1 (cf. e.g. Fig. 3a and Fig. 3b), can be arranged in a second node area 24.K2.

[0102] According to Fig. 2a and Fig. 2b are 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 L WP, ab can be arranged in a third node area 24.K3.

[0103] According to Fig. 3a and Fig. 3b are a preferably curved section of the branch flow circuit discharge line L SK, ab and a - fluidically to the section of the branch flow circuit discharge line LSK, ab separate - preferably curved section of the heat pump drain line L WP, ab can be arranged in the third node area 24.K3.

[0104] A preferably straight section of the bypass line L By is in accordance with Fig. 2a and Fig. 2b can be arranged in a fourth node area 24.K4.

[0105] According to Fig. 3a and Fig. 3b are a preferably curved section of the branch flow circuit discharge line L SK, ab and a - fluidically to the section of the branch flow circuit discharge line L SK, ab separate - preferably curved section of the heat pump drain line L WP, ab can be arranged in the fourth node area 24.K4.

[0106] The recess structure 24 has at least one parallel region 24.P, in which two fluidically separated lines L WP, ab , L SK, abat least partially next to each other, 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, can be arranged (cf. e.g. Fig. 3a and Fig. 3b). In particular, the parallel region 24.P is formed between the third and fourth node regions 24.K3, 24.K4. In particular Fig. Figure 3b shows how two sections of the heat pump discharge line L WP, ab and the branch flow circuit drain line L SK, ab run together / parallel through the parallel area 24.P.

[0107] According to the Fig. 2a and Fig. 2b is a section of the heat exchanger inflow line L WT , zu between the first connection 22.1.A1 and the heating circuit 3-way connector 26.H. Another section of the heat exchanger inlet line L WT, zu istbetween the heating circuit 3-way connector 26.H and the sixth connection 22.1.A6. A section of the heat pump drain line L WP, ab is located between the second connection 22.1.A2 and the third connection 22.1.A3. A section of the heat pump inlet line L WP, 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 L WP, 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.

[0108] According to Fig. 3a and Fig. 3b is a section of the heat exchanger inflow line L WT , zubetween the first connection 22.2.A1 and the first 3-way connector 26.1. Another section of the heat exchanger inlet line L WT, zu ist between the first 3-way connector 26.1 and the sixth connection 22.2.A6. A section of the heat pump drain line L WP, ab with three bends is arranged between the second connection 22.2.A2 and the first 3 / 2-way valve 21.1. A section of the branch flow circuit drain line L SK, ab is arranged between the third connection 22.2.A3 and the first 3-way connector 26.1. A section of the branch flow circuit inlet line L SK, zu is 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 L WP, ab is arranged between the fifth connection 22.2.A5 and the first 3 / 2-way valve 21.1.

[0109] 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 from Fig. 7a and Fig. 7b, 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. Fig. 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 formed as a box.

[0110] 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 by the primary heat source 2 and / or by 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 inlet line L WT ,zu of the pipe system 7 is fluidically connected and / or connected accordingly to the primary heat source 2 on the one hand and to the water-air heat exchanger 4 on the other hand, so that the heat transfer fluid 6 is supplied through the heat exchanger inlet line L WT , zu the water-air heat exchanger 4. A heat pump inlet line L WP, zu of the pipe system 7 is fluidically connected and / or connected accordingly to the water-air heat exchanger 4 on the one hand and to the heat pump 3 on the other hand, so that the heat transfer fluid 6 is supplied through the heat pump inlet line L WP, zu can be fed to the heat pump 3. A heat pump drain line L WP, ab of the pipe system 7 is fluidically connected and / or connected accordingly to the heat pump 3 on the one hand and to the primary heat source 2 on the other hand, so that the heat transfer fluid 6 is discharged through the heat pump discharge line L WP, abcan be supplied to the primary heat source 2.

[0111] 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. However, by means of both hydraulic modules 22.1, 22.2 and the associated universal housing 23, a particularly simple manufacture and assembly of the central heating system 1 is possible. In particular, the heat pump 3 can be particularly easily retrofitted to an existing central heating system 1 with only one primary heat source 2 using the two hydraulic modules 22.1, 22.2 and the associated universal housing 23. For this purpose, only the corresponding lines, namely the heat exchanger inlet line LWT , zu , as well as the heat pump inlet line L WP, zu and as heat pump drain line L WP, ab acting line must be separated and the two hydraulic modules 22.1, 22.2 must be placed in between and fluidically connected to the resulting line ends.

[0112] A heating circuit 3-way connector 26.H is in the heat exchanger inlet line L WT, 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 WP, zuarranged, 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 L By fluidically connected to the heating circuit 3 / 2-way valve 21.H and / or connected accordingly. A first 3-way connector 26.1 is located in the heat exchanger inlet line L WT, zu arranged, formed and / or interposed here. A first 3 / 2-way valve 21.1 is arranged in the heat pump drain line L WP, ab arranged, designed and / or interposed here.

[0113] By means of a branch of the 3-way connector 26.1 and a branch flow circuit discharge line L connected to this branch SK, ab and a branch of the 3 / 2-way valve 21.1 and a branch flow circuit inlet line L connected to this branch SK, zu is a branch flow circuit K AB of the piping system 7. The heat transfer fluid 6 is pumped through the branch flow circuit K by means of at least one pump 8, 9, 9b AB conveyable and with the help of the branch flow circuit K AB The domestic water 11 can be heated by the flowing heat transfer fluid 6. In a first switching position of the first 3 / 2-way valve 21.1, the heat transfer fluid 6 is flowed through the branch flow circuit K AB conveyable and in a second switching position of the first 3 / 2-way valve 21.1, the flow of the heat transfer fluid 6 through the branch flow circuit K ABin particular, at least partially, preferably completely avoidable. The flow path through the first 3 / 2-way valve 21.1 that can be realized in the first switching position of the first 3 / 2-way valve 21.1 is symbolized by the curved arrow and a Roman numeral I. The flow path through the first 3 / 2-way valve 21.1 that can be realized in the second switching position of the first 3 / 2-way valve 21.1 is symbolized by the further, curved arrow and a Roman numeral II.

[0114] 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.

[0115] Inside the domestic hot water tank 5, inside a wall of the domestic hot water tank 5 and / or outside on the wall of the domestic hot water tank 5 there is a heating pipe L HZ arranged and / or designed so that when the heat transfer fluid 6 flows through the heating line L HZ 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. A primary heat source drain line L PQ, ab of the pipe system 7 is connected on the one hand to the primary heat source 2 and on the other hand to the heating pipe L HZ fluidically connected and / or connected accordingly, so that the heat transfer fluid 6 through the primary heat source discharge line L PQ, ab the heating cable L HZ A primary heat source supply line L PQ, zu of the pipe system 7 is connected on the one hand to the heating cable L HZand on the other hand fluidically connected and / or connected accordingly to the primary heat source 2, so that the heat transfer fluid 6 through the primary heat source inflow line L PQ, zu the primary heat source 2. The heat exchanger inlet line L WT , zu is connected to the primary heat source drain line L PQ, ab 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 PQ, 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.

[0116] In particular, a section of the heat exchanger inflow line L WT, zufluidically between the primary heat source discharge line L PQ, ab and the first connection 22.2.A1 of the branch flow circuit hydraulic module 22.2. In particular, a section of the heat pump drain line L WP, ab fluidically between the primary heat source inflow line L PQ, zu and the second connection 22.2.A2 of the branch flow circuit hydraulic module 22.2. Furthermore, a section of the heat exchanger inflow line L WT , 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 L WP, ab 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.

[0117] The branch flow circuit inflow line L SK, zu of the branch flow circuit K AB is in accordance with Fig. 7a via the first 3 / 2-way valve 21.1 and via a primary heat source drain line L PQ, ab arranged and / or interposed second 3-way connector 26.2 with the primary heat source drain line L PQ, ab fluidically connected and / or to the primary heat source discharge line L PQ, ab connected. The branch flow circuit drain line L SK, ab of the branch flow circuit K AB 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 to the primary heat source inflow line L PQ, zu connected.

[0118] The mentioned connections of the branch flow circuit inflow line L SK, zuand the branch flow circuit drain line L SK, ab are particularly easy to achieve or can be realized in a simple manner because the primary heat source 2 according to Fig. 7a, a primary heat source housing 2.G, and the domestic hot water storage tank 5 has a domestic hot water storage 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 housing 5.G (cf. Fig. 7a).

[0119] According to Fig. 7b, however, a water-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 L SK, zu of the branch flow circuit K ABis fluidically connected to a first side 27.1 of the water-water heat exchanger 27 and / or connected thereto, so that the heat transfer fluid 6 is fed through the branch flow circuit inflow line L SK, zu the first side 27.1. The branch flow circuit drain line L SK, ab of the branch flow circuit K AB is fluidically connected to the first side 27.1 and / or connected here, so that the heat transfer fluid 6 is discharged through the branch flow circuit discharge line L SK, ab from the first side 27.1. A domestic water drain line L BW, ab is fluidically connected and / or connected accordingly on the one hand to the domestic hot 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 hot water 11 is discharged through the domestic hot water discharge line L BW, abfrom 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 supply line L BW, zu is fluidically connected and / or connected accordingly on the one hand to the domestic hot water storage tank 5 and on the other hand to the second side 27.2, so that the domestic hot water 11 is supplied through the domestic hot water inlet line L BW, zu can be fed to the domestic hot water tank 5 from the second side 27.2.

[0120] A hot water pipe 17a is in accordance with Fig. 7b with the domestic water drain line L BW, ab fluidically connected and / or to the domestic water drain line L BW, ab A cold water pipe 17b is connected to the domestic water supply pipe L BW, zu fluidically connected and / or to the domestic water inlet line L BW, zuconnected. Heated domestic water 11, e.g., for a shower, can be drawn from the domestic water storage tank 5 via the hot water line 17a. Fresh, "cold" domestic water 11 can be supplied to the domestic water storage tank 5 via the cold water line 17b, particularly during or after domestic water 11, e.g., for a shower, has been drawn from the domestic water storage tank 5, in order to refill the domestic water storage tank 5 via the cold water line 17b. For the sake of simplicity, corresponding control and / or check valves in the hot water line 17a and in the cold water line 17b are not explicitly shown.

[0121] The domestic water 11 can be heated via the water-to-water heat exchanger 27, in particular 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 L HZof the domestic hot water storage tank 5 would not be connected or would only be connected with excessive effort. This is particularly the case if the primary heat source 2 and the domestic hot water storage tank 5 are connected as in Fig. 7b have a common integral housing 28. Then the heating cable L HZ , the primary heat source drain line L PQ, ab and the primary heat source inflow line L PQ, zu , in particular completely, arranged within the integral housing 28 and thus not easily accessible.

[0122] 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.

[0123] In particular, with reference to the Fig. 7a and Fig. 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 to create the flow paths and / or flow circuits: As the Fig. 7a and Fig. 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 respectively arranged in the branch flow circuit inlet line L SK, zu In addition, the Fig. 7a shown embodiment, a second check valve 30 at the corresponding in Fig. Positioning shown in Figure 7a in the primary source discharge line L PQ, ab arranged, 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 WT , zu from the primary source discharge line L PQ, ab Furthermore, the Fig. 7b shown embodiment in particular also a second check valve 31 in the domestic water discharge line L BW, abarranged, in particular in terms of flow, upstream of the domestic 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 domestic water 11. The designation “first” or “second” check valve is not restrictive here, but this designation / numbering of the check valves merely serves to designate them more precisely, and this may also be pointed out.

[0124] In the following, possible flow paths of the heat transfer fluid 6 through the central heating system 1, namely in particular the branch flow circuit K AB and a first and second heating circuit, described in more detail: A branch flow circuit K AB according to the Fig. 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 L SK, zu , via the second 3-way connector 26.2, via the domestic hot water tank 5 or via the heating pipe L HZ , via the third 3-way connector 26.3, via the branch flow circuit drain line L SK, ab , via the first 3-way connector 26.1, via the heating circuit 3-way connector 26.H, via the heating circuit 3 / 2-way valve 21.H in its second switching position II and back to the heat pump 3. With the help of the branch flow circuit K AB according to the Fig. 7a is also a flow of the heat transfer fluid 6 from the heat pump 3, via the circulation pump 9, via the first 3 / 2-way valve 21.1 in its first switching position I, via the branch flow circuit inflow line L SK, zu , via the second 3-way connector 26.2, via the domestic hot water tank 5 or via the heating pipe L HZ , via the third 3-way connector 26.3, via the branch flow circuit drain line L SK, ab , via the first 3-way connector 26.1, via the heating circuit 3-way connector 26.H, via the 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.

[0125] Another branch flow circuit K AB according to the 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 L SK, zu, via the first side 27.1 of the water-water heat exchanger 27, via the branch flow circuit drain line L SK, ab , via the first 3-way connector 26.1, via the heating circuit 3-way connector 26.H, via the heating circuit 3 / 2-way valve 21.H in its second switching position II and back to the heat pump 3. With the help of the branch flow circuit K AB according to Fig. 7b is also a flow of the heat transfer fluid 6 from the heat pump 3, via the circulation pump 9, via the first 3 / 2-way valve 21.1 in its first switching position I, via the branch flow circuit inflow line L SK, zu, via the first side 27.1 of the water-water heat exchanger 27, via the branch flow circuit drain line L SK, ab , via the first 3-way connecting piece 26.1, via the heating circuit 3-way connecting piece 26.H, via the water-air heat exchanger 4, via the heating circuit 3 / 2-way valve 21.H in its first switching position I and back to the heat pump 3.

[0126] By means of the branch flow circuit K AB according to the Fig. 7a, the domestic water 11 is heated in particular by means of the heating pipe L HZ can be heated "directly". Using the branch flow circuit K AB according to the Fig. 7b, the domestic water 11 can be heated, in particular "indirectly," by means 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.

[0127] 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 the 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.

[0128] In a further, second heating circuit, according to the Fig. 7a and Fig. 7b a flow of the heat transfer fluid 6 from the primary heat source 2, via the domestic hot water storage tank 5 or via the heating line L HZ , in particular via the primary heat source 3 / 2-way valve 21.G in its first switching position I, via the heat source pump 9b and back to the primary heat source 2. The heat source pump 9b is necessary to form the second heating circuit. The first heating circuit and the branch flow circuits K AB can also be realized using only the circulation pump 9. The respective branch flow circuit K ABand the second heating circuit can be implemented at least partially simultaneously, in which case the domestic water 11 can be heated both by means of the heat pump 3 and by means of the primary heat source 2.

[0129] According to Fig. 7a the respective branch flow circuit K AB and the second heating circuit partly in 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 are the respective branch flow circuit K AB and the second heating circuit or the respective flow paths that can be realized thereby, in particular completely separated from each other.

[0130] According to Fig. 7a, theoretically still 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 L HZ , via the third 3-way connector 26.3, via the branch flow circuit drain line L SK, ab, via the first 3-way connector 26.1, via the heating circuit 3-way connector 26.H, via the heating circuit 3 / 2-way valve 21.H in its second switching position II and back to the heat pump 3. Also conceivable is 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 connector 26.2, via the domestic hot water tank 5 or via the heating line L. HZ , via the third 3-way connector 26.3, via the branch flow circuit drain line L SK, ab, via the first 3-way connecting piece 26.1, via the heating circuit 3-way connecting piece 26.H, via the water-air heat exchanger 4, via the heating circuit 3 / 2-way valve 21.H in its first switching position I and back to the heat pump 3. The flow paths described above depend in particular on the switching position of the heating circuit 3 / 2-way valve 21.H.

[0131] To form specific branch flow circuits K AB or respective specific flow paths, a targeted control of the primary heat source 3 / 2-way valve 21.G is then necessary, whereas certain respective branch flow circuits K ABor respective 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, in particular, also be supplied completely 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. 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.

[0132] A temperature sensor 13.1 is located in a - vertically viewed - lower area of ​​the domestic hot water tank 5 or adjacent to this - vertically viewed - lower area of ​​the domestic hot water tank 5 for determining the actual domestic hot water temperature T B1 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, depending on the determined actual domestic water temperature T B1 is controllable and / or adjustable. In particular, a central heating control and / or regulation device 12 is connected to the primary heat source 2 for its control and / or regulation.

[0133] The temperature sensor 13.1 is designed as a first temperature sensor 13.1 for determining a first actual domestic water temperature T B1 A second temperature sensor 13.2 is arranged in a - vertically viewed - middle or upper area of ​​the domestic hot water tank 5 for measuring a second, preferably average actual domestic hot water temperature T B2 The second temperature sensor 13.2 is connected to the central heating control and / or regulation device 12 for control, signal, and / or data purposes. The central heating control and / or regulation device 12 is designed and / or constructed such that the primary heat source 2 is controlled as a function of the second actual domestic water temperature T B2 is controllable and / or adjustable.

[0134] The heat pump control and / or regulating device 14 is designed and / or constructed such that the heat pump 3 can be operated and / or activated with the aid of the heat pump control and / or regulating device 14 to heat the heat transfer fluid 6 when the first actual domestic water temperature T measured, determined and / or calculated, in particular by the heat pump control and / or regulating device 14, with the aid of the first temperature sensor 13.1 B1 falls below a first limit temperature.

[0135] The central heating control and / or regulating device 12 is designed and / or constructed such that the primary heat source 2 can be operated and / or activated with the aid of the central heating control and / or regulating device 12 to heat the heat transfer fluid 6 when the second actual domestic water temperature T measured, determined and / or calculated with the aid of the second temperature sensor 13.2 B2falls below a second limit temperature.

[0136] 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.

[0137] Because the first temperature sensor 13.1 measures the first actual domestic water temperature T B1If the measured temperature is determined in the lower area of ​​the domestic hot water storage tank 11 (viewed vertically), the heat pump 3 can be quickly activated without a significant time delay and without extensive and complex control effort using the heat pump control and / or regulation device 14. This helps to avoid initially activating the primary heat source 2, which in turn can save fuel.

[0138] 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.

[0139] 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.

[0140] 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 first 3 / 2-way valve 21.1 for controlling and / or regulating 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 for control / signal / and / or data purposes. Furthermore, the heat pump control and / or regulating device 14 is operatively connected to the first temperature sensor 13.1 for control / signal / and / or data purposes.

[0141] 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 a further outside temperature sensor 13.b for control / signal / and / or data purposes for determining the outside temperature.

[0142] 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 embodiment of the central heating system 1 according to the Fig. 7a and Fig. 7b. These connections are partly symbolized by dashed lines, which are shown as broken lines.

[0143] From the group of the following elements and / or components, namely the branch flow circuit inflow line L SK, zu at least in sections, the branch flow circuit discharge line L SK, ab at least in sections, of the water-water heat exchanger 27, the domestic water inlet line L BW, zu at least in sections, the domestic water discharge line L BW, abAt least two, in particular all, elements and / or components and the respective associated connections are arranged and / or formed on a water-to-water heat exchanger hydraulic module 22.3 forming a common structural unit between the domestic hot water pump 10 and the domestic hot water pump 10. Here, too, the respective aforementioned lines can be formed in sections in this water-to-water heat exchanger hydraulic module 22.3. It is conceivable that the water-to-water heat exchanger hydraulic module 22.3 also has a housing, namely a water-to-water heat exchanger hydraulic module housing.

[0144] To operate the respective central heating system in accordance with the Fig. 7a and Fig. 7b and / or the preferred method for operating the respective central heating system 1, the following may be pointed out or briefly stated: In particular, the primary heat source 2 is operated and / or activated with the aid of the central heating control and / or regulation device 12 for heating the heat transfer fluid 6 only when, in particular, a heat demand of the domestic hot water storage tank 5 exceeds a heat quantity that can be provided by the heat pump 3 at maximum power. This is ensured in particular by the first actual domestic hot water temperature T B1 - viewed vertically - below the second actual domestic water temperature T B2 is measured. In particular, when the output of the heat pump 3 is sufficient to cover the heat demand of the domestic hot water storage tank 5, the second actual domestic hot water temperature T B2 not fall below a certain predetermined second limit temperature and the primary source 2 does not have to be activated and therefore does not have to be operated with fuel combustion. With the Fig. 7a and Fig. 7b, it is therefore particularly feasible that the primary source 2 is activated neither too early nor too late in order to save fuel and to ensure a comfortable temperature control of the domestic water 11 taken from the domestic water storage tank 5, whereby, in particular with the aid of the above-described hydraulic modules 22.1 and 22.2, in particular with the correspondingly designed heating circuit hydraulic module 22.1 and the branch flow circuit hydraulic module 22.2, already existing central heating systems 1 can be retrofitted and / or converted or retrofitted in a simple manner and without great effort, so that in particular the Fig. 7a and Fig. 7b central heating systems 1 which are then equipped and / or operable accordingly can be implemented. List of reference symbols 1 central heating system 2 Primary heat source 2.G Primary heat source housing 3 heat pump 4 water-air heat exchangers 5 domestic hot water tanks 5.G Domestic hot water storage tank housing 6 Heat transfer fluid 7 Pipeline system 8 heating pump 9 Circulation pump 9b Heat source pump 10 domestic water pump 11 Domestic water 12 Central heating control and / or regulation device 13.1 first temperature sensor 13.2 second temperature sensor 13.a Outside temperature sensor 13.b Outside temperature sensor 14 Heat pump control and / or regulation device 17a Hot water pipe 17b Cold water pipe 19 inverters 21.1 first 3 / 2-way valve 21.H Heating circuit 3 / 2-way valve 21.G Primary heat source 3 / 2-way valve 22.1 Heating circuit hydraulic module 22.1.G Heating circuit hydraulic module housing 22.1.S1 first page of the heating circuit hydraulic module 22.1 22.1.S2 second side of the heating circuit hydraulic module 22.1 22.1.S3 third side of the heating circuit hydraulic module 22.1 22.1.A1 - 22.1.A6 Connections of the heating circuit hydraulic module 22.1 22.2 Branch flow circuit hydraulic module 22.2.G Branch flow circuit hydraulic module housing 22.2.S1 first side of the branch flow circuit hydraulic module 22.2 22.2.S2 second side of the branch flow circuit hydraulic module 22.2 22.2.S3 third side of the branch flow circuit hydraulic module 22.2 22.2.A1 - 22.2.A6 Connections of the branch flow circuit hydraulic module 22.2 22.3 Water-to-water heat exchanger hydraulic module 23 Universal Housing 23.1 Basic body 23.2 Lid 23.T parting line 24 Recess structure 24.A1 - 24.A6 Connection openings of the recess structure 24.V Valve opening 24.K1 - 24.K4 Nodal areas of the recess structure 24.P Parallel area of ​​the recess structure 26.1 first 3-way connector 26.2 second 3-way connector 26.3 third 3-way connector 26.H Heating circuit 3-way connector 27 water-water heat exchangers 27.1 First side of the water-water heat exchanger 27 27.2 second side of the water-water heat exchanger 27 28 integral housings 29 Check valve 30 Check valve 31 Check valve K AB Branch flow circuit T B1 first actual domestic water temperature T B2 second actual domestic water temperature L WT, zu Heat exchanger inflow line L WP, zu Heat pump inflow line L WP, ab Heat pump drain line LBy Bypass line L HZ Heating cable L PQ, ab Primary heat source drain line L PQ, zu Primary heat source inflow line L SK, zu Branch flow circuit inflow line L SK, ab Branch flow circuit drain line L BW, ab Domestic water drain line L BW, zu Domestic water supply line QUOTES CONTAINED IN THE DESCRIPTION

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

[0000] DE 32 30 940 A1

[0003]

Claims

[1] 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 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, 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), wherein a heat transfer fluid (6), in particular water, can be heated with the aid of the primary heat source (2) and / or with the aid of the heat pump (3), wherein with the aid of the piping system (7) and with the aid of at least one pump (8, 9, 9b), in particular a heating pump (8) and / or a circulating pump (9) and / or a heat source pump (9b), the heat transfer fluid (6) is conveyed to the heat source for heating by the Heat pump (3) and / or,in particular for its heating, can be conveyed by the primary heat source (2), wherein a heat exchanger inflow line (L, WT, zu ) of the pipe system (7) is fluidically connectable, connected and / or connected accordingly to the primary heat source (2) on the one hand and to the water-air heat exchanger (4) on the other hand, so that the heat transfer fluid (6) is supplied through the heat exchanger inlet line (L WT, zu ) can be fed to the water-air heat exchanger (4), wherein a heat pump inlet line (L WP, zu ) of the pipe system (7) is fluidically connectable, connected and / or connected accordingly to the water-air heat exchanger (4) on the one hand and to the heat pump (3) on the other hand, so that the heat transfer fluid (6) is supplied through the heat pump inlet pipe (L WP, zu ) of the heat pump (3), wherein a heat pump discharge line (L WP, ab) of the pipe system (7) is fluidically connectable, connected and / or connected accordingly to the heat pump (3) on the one hand and to the primary heat source (2) on the other hand, so that the heat transfer fluid (6) is discharged through the heat pump discharge pipe (L WP, ab ) can be fed to the primary heat source (2), characterized by that the 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 (L WT, zu ), sectionally the heat pump inlet line (L WP, zu ), section by section the heat pump drain line (L WP, ab ) and a bypass line (L By ) are formed and / or arranged, wherein the heating circuit 3-way connecting piece (26.H) is arranged in the heat exchanger inlet line (L WT, zu) is arranged, formed and / or interposed here and the heating circuit 3 / 2-way valve (21.H) in the heat pump inlet line (L WP, zu ) is arranged, formed and / or interposed here, or wherein the heating circuit 3 / 2-way valve (21.H) is arranged in the heat exchanger inlet line (L WT, zu ) is arranged, formed and / or interposed here and the heating circuit 3-way connector (26.H) in the heat pump inlet line (L WP, zu ) is arranged, formed and / or interposed here, and wherein the heating circuit 3-way connector (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 bythat 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) of the heating circuit hydraulic module (22.1) 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) are arranged and / or formed. [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 its heating, can be conveyed by the primary heat source (2), wherein a heat exchanger inflow line (L, WT, zu ) of the pipe system (7) is fluidically connectable, connected and / or connected accordingly to the primary heat source (2) on the one hand and to the water-air heat exchanger (4) on the other hand, so that the heat transfer fluid (6) is supplied through the heat exchanger inlet line (L WT, zu ) can be fed to the water-air heat exchanger (4), wherein a heat pump inlet line (L WP, zu ) of the pipe system (7) is fluidically connectable, connected and / or connected accordingly to the water-air heat exchanger (4) on the one hand and to the heat pump (3) on the other hand, so that the heat transfer fluid (6) is supplied through the heat pump inlet pipe (L WP, zu ) of the heat pump (3), wherein a heat pump discharge line (L WP, ab) of the pipe system (7) is fluidically connectable, connected and / or connected accordingly to the heat pump (3) on the one hand and to the primary heat source (2) on the other hand, so that the heat transfer fluid (6) is discharged through the heat pump discharge pipe (L WP, ab ) can be fed to the primary heat source (2), characterized by that the 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 (L WT, zu ), section by section the heat pump drain line (L WP, ab ), in sections a branch flow circuit inflow line (L SK, zu ) and in sections a branch flow circuit discharge line (L SK, ab) are formed and / or arranged, wherein the 3-way connecting piece (26.1) is arranged in the heat exchanger inlet line (L WT, zu ) is arranged, formed and / or interposed here, and wherein the 3 / 2-way valve (21.1) is arranged in the heat pump discharge line (L WP, ab ) is arranged, designed and / or interposed here. [4] Branch flow circuit hydraulic module (22.2) according to claim 3, characterized by that by means of a branch of the 3-way connector (26.1) and a branch flow circuit discharge line (L SK, ab ) and a branch of the 3 / 2-way valve (21.1) and a branch flow circuit inlet line (L SK, zu ) a branch flow circuit (K AB ) of the line system (7), wherein the heat transfer fluid (6) is pumped through the branch flow circuit (K AB) and with the help of the branch flow circuit (K AB ) flowing heat transfer fluid (6) the domestic water (11) can be heated. [5] Branch flow circuit hydraulic module (22.2) according to claim 3 or 4, characterized by 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 (L SK, zu ) and the branch flow circuit drain line (L SK, ab) 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) which 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 by that at least two different configurations of lines (LWT, zu , L WP, zu , L WP, ab , L By , L SK, zu , L SK, 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 (L WT, zu , L WP, zu , L WP, ab , L By , L SK, zu , L SK, 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 by that the universal housing (23) has at least one recess structure (24) with several recess areas (24.K1 - 24.K4, 24.P) for receiving lines (L WT, zu , L WP, zu , L WP, ab, LBy , L SK, zu , L SK, ab ), connecting pieces (26.H, 26.1) and / or valves (21.H, 21.1). [8] Universal housing (23) according to claim 7, characterized by that the recess structure (24) is at least partially designed as a negative form of the lines (L WT, zu , L WP, zu , L WP, ab , L By , L SK, zu , L SK, 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 by 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 bythat 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), 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 by 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 byin 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 by 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 by 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 WP, ab , L SK, zu ) can be arranged. [15] Universal housing (23) according to claim 14, characterized by 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 by 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 by 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 drain line (L WP, ab ) can be arranged in a third node area (24.K3). [18] Universal housing (23) according to one of claims 14 to 16, characterized by that a preferably curved section of the branch flow circuit discharge line (L SK, ab ) and a - flow-wise to the section of the branch flow circuit discharge line (L SK, ab ) separate - preferably curved section of the heat pump drain line (L WP, ab ) can be arranged in the third node area (24.K3). [19] Universal housing (23) according to one of claims 14 to 18, characterized by 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 by that a preferably curved section of the branch flow circuit discharge line (L SK, ab ) and a - flow-wise to the section of the branch flow circuit discharge line (L SK, ab) separate - preferably curved section of the heat pump drain line (L WP, ab ) can be arranged in the fourth node area (24.K4). [21] Universal housing (23) according to one of claims 7 to 20, characterized by that the recess structure (24) has at least one parallel region (24.P) in which two fluidically separated lines (L WP, ab , L SK, 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 extending 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 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 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), wherein a heat exchanger inflow line (L, WT, zu ) of the pipe system (7) is fluidically connected and / or connected accordingly to the primary heat source (2) on the one hand and to the water-air heat exchanger (4) on the other hand, so that the heat transfer fluid (6) is supplied through the heat exchanger inlet line (L WT , zu ) can be fed to the water-air heat exchanger (4), wherein a heat pump inlet line (L WP , zu ) of the pipe system (7) is fluidically connected and / or connected accordingly to the water-air heat exchanger (4) on the one hand and to the heat pump (3) on the other hand, so that the heat transfer fluid (6) is supplied through the heat pump inlet pipe (LWP, zu ) of the heat pump (3), wherein a heat pump discharge line (L WP, ab ) of the pipe system (7) is fluidically connected and / or connected accordingly to the heat pump (3) on the one hand and to the primary heat source (2) on the other hand, so that the heat transfer fluid (6) is discharged through the heat pump discharge pipe (L WP, ab ) can be fed to the primary heat source (2), characterized by that a heating circuit 3-way connector (26.H) is installed in the heat exchanger inlet line (L WT , zu ) is arranged, formed and / or interposed here and a heating circuit 3 / 2-way valve (21.H) in the heat pump inlet line (L WP, zu ) is arranged, formed and / or interposed here, or wherein the heating circuit 3 / 2-way valve (21.H) is arranged in the heat exchanger inlet line (L WT , zu) is arranged, formed and / or interposed here and the heating circuit 3-way connector (26.H) in the heat pump inlet line (L WP, zu ) is arranged, formed and / or interposed here, wherein the heating circuit 3-way connecting piece (26.H) is connected via the bypass line (L By ) is fluidically connected and / or connected accordingly to the heating circuit 3 / 2-way valve (21.H), wherein a - first - 3-way connecting piece (26.1) is provided in the heat exchanger inlet line (L WT , zu ) is arranged, formed and / or interposed here, and wherein a - first - 3 / 2-way valve (21.1) is arranged in the heat pump discharge line (L WP, ab ) is arranged, designed and / or interposed here. [23] Central heating system (1) according to claim 22, characterized by that by means of a branch of the 3-way connector (26.1) and a branch flow circuit discharge line (LSK, ab ) and a branch of the 3 / 2-way valve (21.1) and a branch flow circuit inlet line (L SK, zu ) a branch flow circuit (K AB ) of the line system (7), wherein the heat transfer fluid (6) is pumped through the branch flow circuit (K AB ) and with the help of the branch flow circuit (K AB ) flowing heat transfer fluid (6) the domestic water (11) can be heated. [24] Central heating system (1) according to claim 22 or 23, characterized by that a heating line (L HZ ) is arranged and / or designed so that when the heat transfer fluid (6) flows through the heating line (L HZ) 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) on the one hand with the primary heat source (2) and on the other hand with the heating pipe (L HZ ) is fluidically connected and / or connected accordingly, so that the heat transfer fluid (6) flows through the primary heat source discharge line (L PQ, ab ) of the heating cable (L HZ ), wherein a primary heat source inflow line (L PQ, zu ) of the pipe system (7) on the one hand with the heating cable (L HZ ) and on the other hand is fluidically connected and / or connected accordingly to the primary heat source (2), so that the heat transfer fluid (6) is supplied through the primary heat source inflow line (L PQ, zu ) of the primary heat source (2), wherein the heat exchanger inflow line (L WT , zu) with the primary heat source drain 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 (L PQ, 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 by that the branch flow circuit inflow line (L SK, zu ) of the branch flow circuit (K AB ) via the first 3 / 2-way valve (21.1) and via a connection in the primary heat source drain line (L PQ,ab ) and / or interposed second 3-way connecting piece (26.2) with the primary heat source discharge line (L PQ, ab) fluidically connected and / or to the primary heat source discharge line (L PQ, ab ), whereby the branch flow circuit discharge line (L SK, ab ) of the branch flow circuit (K AB ) with the first 3-way connector (26.1) and via a third 3-way connector (26.3) with the primary heat source inlet 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 by 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 by 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 inlet line (L SK, zu ) of the branch flow circuit (K AB ) is fluidically connected to a first side (27.1) of the water-water heat exchanger (27) and / or connected thereto, so that the heat transfer fluid (6) is supplied through the branch flow circuit inflow line (L SK, zu ) of the first side (27.1), wherein the branch flow circuit discharge line (L SK, ab ) of the branch flow circuit (K AB ) is fluidically connected to the first side (27.1) and / or connected thereto, so that the heat transfer fluid (6) is discharged through the branch flow circuit discharge line (L SK, ab ) can be discharged from the first side (27.1), whereby a domestic water discharge 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) 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, zu ) is fluidically connected and / or connected accordingly on the one hand to the domestic water storage tank (5) and on the other hand to the second side (27.2), so that the domestic water (11) is supplied through the domestic water inlet line (L BW, zu ) can be fed to the domestic hot water storage tank (5) from the second side (27.2). [28] Central heating system (1) according to claim 27, characterized by that a hot water pipe (17a) is connected to the domestic water drain pipe (L BW, ab) fluidically connected and / or to the domestic water discharge line (L BW, ab ), whereby a cold water pipe (17b) is connected to the domestic water inlet pipe (L BW, zu ) fluidically connected and / or to the domestic water inlet pipe (L BW, zu ) is connected. [29] Central heating system (1) according to claim 27 or 28, characterized by that the primary heat source (2) and the domestic hot water storage tank (5) have a common integral housing (28), wherein the primary heat source discharge line (L PQ, ab ) and the primary heat source inflow line (L PQ, 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 bythat 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 piping system (7) assigned to the respective unit (2, 3, 4) or in a partial piping region having the respective unit (2, 3, 4). [31] Central heating system (1) according to one of claims 22 to 30, characterized by that a temperature sensor (13.1) is arranged in a - vertically viewed - lower area of ​​the domestic hot water storage tank (5) or adjacent to this - vertically viewed - lower area of ​​the domestic hot water storage tank (5) for determining the actual domestic hot water temperature (T B1), wherein the temperature sensor (13.1) is connected to a heat pump control and / or regulating device (14) in terms of control, signaling and / or data technology, wherein the heat pump (3) is connected to the heat pump control and / or regulating device (14) in terms of control, and wherein the heat pump control and / or regulating device (14) is designed and / or constructed such that the heat pump (3) is controlled in dependence on the determined actual domestic water temperature (T B1 ) is controllable and / or adjustable. [32] Central heating system (1) according to one of claims 22 to 31, characterized by that the first actual domestic water temperature (T B1 ) can be transmitted to the heat pump control and / or regulating device (14) and / or can be determined and / or calculated by means of the heat pump control and / or regulating device (14), wherein a second, preferably average, actual domestic water temperature (T B2) can be measured, determined and / or calculated by means of a second temperature sensor (13.2) in a - vertically viewed - middle or upper area of ​​the domestic hot water storage tank (5), wherein the second actual domestic hot 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 by means of the central heating control and / or regulating device (12) as a function of the second actual domestic water temperature (T B2 ) is controllable and / or adjustable.

Images