WO2025003336A1 - Système de chauffage central et procédé de fonctionnement et/ou de commande et/ou de régulation d'un système de chauffage central - Google Patents

Système de chauffage central et procédé de fonctionnement et/ou de commande et/ou de régulation d'un système de chauffage central Download PDF

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Publication number
WO2025003336A1
WO2025003336A1 PCT/EP2024/068146 EP2024068146W WO2025003336A1 WO 2025003336 A1 WO2025003336 A1 WO 2025003336A1 EP 2024068146 W EP2024068146 W EP 2024068146W WO 2025003336 A1 WO2025003336 A1 WO 2025003336A1
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Prior art keywords
heat
pump
water
line
transfer fluid
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PCT/EP2024/068146
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German (de)
English (en)
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Peter Brecklinghaus
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F24D3/082—Hot water storage tanks specially adapted therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1069—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water regulation in function of the temperature of the domestic hot water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1072—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/18—Hot-water central heating systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/223—Temperature of the water in the water storage tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/223—Temperature of the water in the water storage tank
    • F24H15/225—Temperature of the water in the water storage tank at different heights of the tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/32—Control of valves of switching valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/04—Gas or oil fired boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/02—Fluid distribution means
    • F24D2220/0235—Three-way-valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/02—Fluid distribution means
    • F24D2220/0242—Multiple way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/02—Fluid distribution means
    • F24D2220/0292—Fluid distribution networks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/04—Sensors
    • F24D2220/042—Temperature sensors

Definitions

  • the invention relates to a central heating system with the features of the preamble of patent claim 1 or 2 and to a method for operating and/or controlling and/or regulating a central heating system with the features of the preamble of patent claim 21 or 22.
  • the central heating systems known in the prior art generally have at least one primary heat source that can be operated with the aid of fuels, in particular a gas boiler or a heating boiler.
  • Some central heating systems also have an electrically operated heat pump, but at least one water-air heat exchanger, preferably a heater or a radiator for heating a building, and/or at least one domestic water storage tank, in particular a boiler, for temporarily storing domestic water.
  • a heat transfer fluid in particular water, can be heated with the aid of the primary heat source and/or with the aid of the heat pump, wherein the heat transfer fluid can be conveyed by means of a pipe system and with the aid of at least one pump, in particular a heating pump, a circulation pump and/or a heat source pump, for heating by the heat pump and/or, in particular, for heating by the primary heat source.
  • a heat exchanger inflow line of the pipe system is fluidically connected to the primary heat source on the one hand and to the water-air heat exchanger on the other hand and/or connected accordingly, so that the heat transfer fluid can be fed to the water-air heat exchanger through the heat exchanger inflow line.
  • a heat pump inflow line of the pipe system is fluidically connected to the water-air heat exchanger on the one hand and to the heat pump on the other hand and/or connected accordingly, so that the heat transfer fluid can be fed to the heat pump through the heat pump inflow line.
  • a heat pump outflow line of the pipe system is fluidically connected to the heat pump on the one hand and to the primary heat source on the other hand and/or connected accordingly, so that the heat transfer fluid can be fed to the primary heat source through the heat pump outflow line.
  • the water-air heat exchanger and the heat pump are therefore fluidically connected in series with respect to the primary heat source and/or can be connected in series.
  • DE 29 19 751 C2 describes a central heating system with a heat transfer fluid that can be heated or warmed with fuels in a boiler, whereby a heating circuit for heating radiators in a building is connected to the boiler and the heated heat transfer fluid flows through the heating circuit.
  • the heating circuit has a heat exchanger inflow line, also called the flow line, via which the heat transfer fluid is fed to the water-air heat exchangers designed as radiators.
  • the heating circuit also has a heat exchanger outflow line, also called the return line, via which the heat transfer fluid is then led from the radiators back to the boiler.
  • the proportion of heat transfer fluid that flows to the radiators can be adjusted using a four-way mixing valve connected in the flow and return lines and a heating pump assigned to the radiators.
  • a boiler for heating domestic water is installed in the boiler.
  • the heat transfer fluid can be fed to a heat pump from the heat exchanger inflow line of the heating circuit and then fed back at an increased temperature from the heat pump into the heat exchanger outflow line of the heating circuit.
  • two temperature sensors are arranged in a heat pump inflow line leading to the heat pump, while another temperature sensor measures the temperature of the supply air that is fed to an evaporator of the heat pump.
  • the heat pump and boiler can be operated separately or simultaneously.
  • the heat pump is not operated below an outside temperature of 3°C or 5°C for economic reasons. In a range around this 3°C or 5°C, the actual heat transfer fluid temperature at the boiler is kept at 55°C by the boiler, so that the heat pump is not switched on as often.
  • such a central heating system is not yet optimally designed in terms of the fuel savings potential, in particular because the heat pump is only operated above an outside temperature of 3°C or 5°C.
  • the boiler is preferably operated and the heat pump is only switched on when required and only rarely, so that in the aforementioned temperature range, heat is preferably provided using the fuels.
  • the control and/or regulation of the four-way mixing valve mentioned is complex, especially if the heat pump is subsequently installed on an existing heating system. Control and/or regulation of the four-way mixing valve mentioned using the heat pump is then not possible or only possible with major control or regulation changes to the central heating system.
  • Such four-way mixing valves or similar valves are often also installed in a housing of the boiler and are therefore not accessible when the heat pump is retrofitted.
  • the invention is therefore based on the object of designing and/or further developing the central heating system or the method for operating and/or controlling and/or regulating the central heating system in such a way that in particular the necessary fuel requirement for the primary energy source is reduced over the year, in particular the design and/or control technology effort is reduced, and in particular the associated costs are also reduced.
  • One aspect of the invention is essentially that a first 3/2-way valve is arranged in the heat exchanger inflow line and/or is interposed here.
  • a first 3-way connector is arranged in the heat pump outflow line and/or is interposed here, so that a branch flow circuit of the line system is formed by means of a branch of the 3/2-way valve and a branch of the 3-way connector.
  • the heat transfer fluid can be conveyed through the branch flow circuit by means of the at least one pump and the domestic water can be heated with the aid of the heat transfer fluid flowing through the branch flow circuit.
  • One aspect of the invention then essentially lies in the fact that a - first - 3-way connector is arranged in the heat exchanger inflow line and/or is interposed here, wherein a - first - 3/2-way valve is arranged in the heat pump outflow line and/or is interposed here, so that a branch flow circuit of the line system is formed by means of a branch of the 3-way connector and a branch of the 3/2-way valve, wherein the heat transfer fluid can be conveyed through the branch flow circuit by means of the at least one pump and the domestic water can be heated with the aid of the heat transfer fluid flowing through the branch flow circuit.
  • a 3/2-way valve can be designed in particular with the help of a 3-way connector and a valve body, whereby two different flow paths can be realized through the 3-way connector by means of the valve body.
  • the term “domestic water storage tank” 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 is/can then be taken from the domestic water storage tank, for example for a domestic shower or for domestic cooking or washing up, with new fresh water then being fed into the domestic water storage tank to refill it.
  • the designation of this storage tank as a “domestic water storage tank” does not mean that already used/used and/or dirty water is stored in this tank, but rather that the water stored and/or stored here 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.
  • a heating line is arranged and/or formed within the domestic water tank, within a wall of the domestic water tank and/or on the outside of the wall of the domestic water tank, so that when the heat transfer fluid flows through the heating line, the domestic water then present in the domestic water tank can be heated by means of the heat transfer fluid.
  • a primary heat source drain line of the pipe system is fluidically connected on the one hand to the primary heat source and on the other hand to the heating line and/or connected accordingly, so that the heat transfer fluid can be fed to the heating line through the primary heat source drain line.
  • a primary heat source inflow line of the line system is fluidically 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 fed to the primary heat source through the primary heat source inflow line.
  • the heat exchanger inflow line is fluidically connected to the primary heat source drain line and/or fluidically connected to the primary heat source drain line.
  • the heat pump drain line is fluidically connected to the primary heat source inflow line and/or fluidically connected to the primary heat source inflow line, in particular with the aid of a primary heat source 3/2-way valve.
  • a branch flow circuit inflow line of the branch flow circuit is fluidically connected to the primary heat source outflow line and/or connected to the primary heat source outflow line via the first 3-way connector or via the first 3/2-way valve and via a second 3-way connector arranged in the primary heat source outflow line and/or interposed therein.
  • a branch flow circuit outflow line of the branch flow circuit is fluidically connected to the first 3/2-way valve or to the first 3-way connector and via a third 3-way connector to the primary heat source inflow line and/or connected to the primary heat source inflow line.
  • the primary heat source has a primary heat source housing and the domestic water storage tank has a domestic water storage tank housing arranged at a distance from the primary heat source housing.
  • the second and third 3-way connecting pieces are arranged between the primary heat source housing and the domestic water storage tank housing.
  • the primary heat source drain line and the primary heat source inflow line are at least partially accessible from the outside.
  • a water-water heat exchanger in particular a plate heat exchanger, is provided, in particular designed as a separate component, wherein the branch flow circuit inflow line of the branch flow circuit is fluidically connected to a first side of the water-water heat exchanger and/or is connected thereto, so that the heat transfer fluid can be supplied to the first side through the branch flow circuit inflow line.
  • the branch flow circuit outflow line of the branch flow circuit is fluidically connected to the first side and/or is connected thereto, so that the heat transfer fluid can be discharged from the first side through the branch flow circuit outflow line.
  • a domestic water drain line is fluidically connected on the one hand to the domestic water tank and on the other hand to a second side of the water-water heat exchanger and/or connected accordingly, so that the domestic water can be fed through the domestic water drain line from the domestic water tank to the second side, in particular with the help of a domestic water pump.
  • a domestic water inflow line is fluidically connected on the one hand to the domestic water tank and on the other hand to the second side and/or connected accordingly, so that the domestic water can be fed through the domestic water inflow line to the domestic water tank from the second side.
  • a check valve opening towards the domestic water pump is fluidically arranged upstream of the domestic water pump.
  • the energy provided by the heat pump can be transferred to the domestic water via the water-water heat exchanger.
  • the water-water heat exchanger is The flow rates of the heat transfer fluid through the heat pump and through the first side of the water-water heat exchanger can then be optimized in order to achieve the best possible heat transfer to the domestic water.
  • a hot water pipe is advantageously fluidically connected to the domestic water discharge pipe and/or connected to the domestic water discharge pipe.
  • a cold water pipe is preferably fluidically connected to the domestic water inflow pipe and/or connected to the domestic water inflow pipe.
  • Heated domestic water can be taken from the hot water tank via the hot water pipe for subsequent "use", e.g. for showering. If the heated domestic water does not have the desired temperature, the "still too cold" domestic water is fed to the second side of the water-water heat exchanger to be heated there using the energy provided by the heat pump. The domestic water heated in the second side of the water-water heat exchanger can then be fed back into the domestic water tank, possibly with the addition of fresh, cold domestic water fed in via the cold water pipe.
  • the primary heat source and the domestic water storage tank have a common integral housing, wherein the primary heat source outflow line and the primary heat source inflow line are arranged, in particular each completely, within the integral housing.
  • the above-described variant of the central heating system with the separate water-water heat exchanger is used in particular when the primary heat source and the domestic hot water tank have a common integral housing and a subsequent connection of the heat pump between the primary heat source and the domestic hot water tank is not possible or only possible with disproportionate effort, i.e. with changes to such an integral housing.
  • 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 in arranged in a fluidically compatible manner in an area of the piping system assigned to the respective unit or in a partial piping area containing the respective unit.
  • the mass flow of heat transfer fluid conveyed through the water-air heat exchanger can thus be adjusted using the heating pump, the mass flow of heat transfer fluid conveyed through the heat pump can be adjusted using the circulation pump, and the mass flow of heat transfer fluid conveyed through the primary heat source can be adjusted using the heat source pump.
  • the heating pump and the heat source pump in particular are optional, since if the valves described above are switched accordingly, the flow through the water-air heat exchanger and/or the primary heat source can also be generated using just the circulation pump, for example.
  • a central heating control and/or regulating device is connected to the primary heat source for control and/or regulation.
  • a temperature sensor is arranged in a - viewed vertically - lower area of the domestic hot water tank or adjacent to this - viewed vertically - 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 in such a way 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.
  • 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. Due to the arrangement of the temperature sensor in the - viewed vertically - lower area of the domestic water tank, the heat pump can initially be controlled and/or regulated particularly quickly, in particular without a large time delay, especially when fresh and therefore cold or colder domestic water is fed back into the domestic water tank due to the removal of domestic water from the domestic water tank (e.g. for a domestic shower) by filling the domestic water tank with fresh domestic water.
  • the - fresh - domestic water fed in flows around the temperature sensor before it mixes with the rest of the domestic water still present in the domestic water tank, some of which has already been heated.
  • the lower region of the domestic water tank is formed or preferably forms in a lower half, in particular a lower third, in particular in a lower quarter, of the entire height of the domestic water tank.
  • the first temperature sensor is then provided or arranged in particular in this previously mentioned or defined lower region of the domestic water tank.
  • the temperature sensor is arranged in or on a part of a domestic water inflow line formed between an inflow valve and an inflow connection of the domestic water storage tank, in particular by means of a T-piece.
  • the inlet valve By opening the inlet valve, fresh domestic water, especially drinking water, can be fed to the domestic water tank via the cold water pipe, the domestic water inlet pipe and the inlet connection. Adjacent to the domestic water tank, the domestic water inlet pipe is functionally assigned to the condensate tank, since the domestic water temperatures here are comparable to those at the same level within the domestic water tank.
  • the temperature sensor can also be installed on the domestic water inlet pipe without great effort in terms of construction, since the domestic water tank itself does not have to be structurally modified and the temperature sensor can still be installed, especially with direct contact with the domestic water supplied.
  • a section of the domestic water inlet pipe can also be cut out and replaced in particular with a T-piece, in which case the temperature sensor is arranged in a branch of the T-piece and is preferably connected to the T-piece with a closure cap.
  • the T-piece could also be interposed in the domestic water supply line in such a way that part of the domestic water supply line is connected to the branch of the T-piece, so that the temperature sensor is still arranged on one of the two parallel connections of the T-piece and closes this connection and the temperature sensor then preferably penetrates the T-piece completely.
  • the aforementioned temperature sensor is advantageously designed as a first temperature sensor for determining a first actual domestic water temperature, with a second temperature sensor being arranged in a - viewed vertically - middle or upper area of the domestic water tank for measuring a second, preferably average actual domestic water temperature.
  • the second temperature sensor is connected to the Central heating control and/or regulating device connected in terms of control/signal/and/or data technology.
  • the central heating control and/or regulating device is designed and/or constructed in such a way that the primary heat source can be controlled and/or regulated depending on the second actual domestic water temperature.
  • the term "connected in terms of control technology" used here and elsewhere can and does always include a signal and/or data connection.
  • the middle or upper area of the domestic hot water tank - viewed vertically - is preferably formed in the upper half, the entire height of the domestic hot water tank, or is then formed accordingly there.
  • the central heating control and/or regulating device and the heat pump control and/or regulating device are preferably designed separately from one another so that they do not directly influence one another and the controls and/or regulations carried out by means of the central heating control and/or regulating device and those carried out by means of the heat pump control and/or regulating device are independent of one another. This is particularly advantageous if the heat pump control and/or regulating device including the heat pump are subsequently integrated into the central heating system, since the central heating control and/or regulating device then does not have to be changed.
  • central heating control and/or regulating device and the heat pump control and/or regulating device are or will be combined in a common control and/or regulating device, which is advantageous if the entire central heating system is designed at the same time.
  • the first temperature sensor is arranged - essentially in the vertical direction - below the second temperature sensor, whereby due to a temperature stratification of the domestic water forming within the domestic water tank, not only can a lower actual domestic water temperature be determined by means of the first temperature sensor than by means of the second temperature sensor, but a change in the temperature, in particular a decrease in the temperature, can be determined earlier in time with the first temperature sensor than with the second temperature sensor.
  • This also forms the basis in particular for a independently designed central heating control and/or regulating device or a heat pump control and/or regulating device to optimally control the heat pump, in particular to operate it preferentially and to activate and/or operate the primary heat source only when the power or amount of heat provided by the heat pump, in particular to cover the need to heat the domestic water tank, is no longer sufficient, so that the need for fuel for the primary heat source can thus be minimized or at least reduced.
  • the first temperature sensor - viewed vertically - is arranged in the lower half of the domestic water tank and the second temperature sensor - viewed vertically - is arranged in the upper half of the domestic water tank, respectively at the corresponding height or in the corresponding area (lower half or upper half) of the total vertical height of the domestic water tank.
  • the heat pump control and/or regulating device is further preferably designed and/or constructed such that the heat pump can be operated and/or activated with the aid of the heat pump control and/or regulating device to heat the heat transfer fluid when the first actual domestic water temperature measured, determined and/or calculated, in particular by the heat pump control and/or regulating device, falls below a first limit temperature.
  • the central heating control and/or regulating device is designed and/or constructed such that the primary heat source can be operated and/or activated with the aid of the central heating control and/or regulating device to heat the heat transfer fluid when the second actual domestic water temperature measured, determined and/or calculated with the aid of the second temperature sensor falls below a second limit temperature.
  • the heat pump can be operated in a particularly simple manner.
  • the first and second limit temperatures are selected accordingly or set to a specific limit temperature.
  • the first limit temperature is lower than the second limit temperature.
  • the second limit temperature could also be lower than the first limit temperature, in which case the second limit temperature is in particular 43°C, in particular in the range from 41°C to 45°C, in which case the first limit temperature is in particular 48°C and in particular in the range from 46°C to 50°C.
  • the central heating control and/or regulating device which preferably operates or operates independently of one another, and the heat pump control and/or regulating device. then an indirect dependency of these two control and/or regulating devices on each other is achieved or realized, and in particular it can also be selected and/or determined when, for example, the primary heat source is added to the heat pump or additionally activated.
  • an output of the heat pump can be continuously adjusted by means of the heat pump control and/or regulating device, in particular an inverter of the heat pump control and/or regulating device, in particular between 0 kW and 25 kW, in particular between 1.5 kW and 7 kW.
  • the heat pump can usually always provide exactly the amount of heat required for the entire central heating system, which has a very positive overall effect on the control and/or regulation of the central heating system.
  • a heat pump with a high maximum output can also be used sensibly, i.e. even if there is only a small heat requirement, the heat pump can provide this heat requirement and heat losses can be kept to a minimum.
  • heat pumps with a lower output were used, for example.
  • the entire heat transfer fluid heated by the heat pump can also be fed to the primary heat source via the heat pump drain line of the pipe system. This further reduces the fuel requirement of the primary heat source, as the primary heat source does not need to be activated and/or operated at all or only rarely due to the heat transfer fluid fed to the primary heat source at a relatively high temperature.
  • the line system preferably has at least one fluidically arranged and/or functionally connected between the first 3/2-way valve or the first 3-way connector on the one hand and the water-air heat exchanger and the heat pump on the other hand.
  • effectively designed 4/2-way valve with the help of which the heat transfer fluid can be directed and/or guided to the water-air heat exchanger or past the water-air heat exchanger to the heat pump.
  • a combination of a 3/2-way valve with a 3-way connector which are each fluidically connected to one another via a connection, also functions in the same way as the 4/2-way valve mentioned above.
  • This last-mentioned combination or design then has four connections and two switching positions, namely the 3/2-way valve, so that two different flow paths between the four connections can be implemented accordingly.
  • a flow of the heat transfer fluid from the heat pump, via the circulation pump, via the first 3-way connector, via the branch flow circuit inflow line, via the second 3/2-way connector, via the domestic hot water tank or via the heating line, via the third 3-way connector, via the branch flow circuit outflow line, via the first 3/2-way valve in its first switching position and via the 4/2-way valve and back to the heat pump can be realized.
  • a flow of the heat transfer fluid from the heat pump, via the circulation pump, via the first 3-way connector, via the branch flow circuit inflow line, via the second 3-way connector, via the domestic hot water tank or via the heating line, via the third 3-way connector, via the branch flow circuit outflow line, via the first 3/2-way valve in its first switching position, via the 4/2-way valve, via the water-air heat exchanger and back to the heat pump can be realized.
  • the flow paths described above are particularly dependent on the switching position of the 4/2-way valve, in particular the second and third 3/2-way valves that form the 4/2-way valve.
  • the flow of the heat transfer fluid is from the heat pump, via the circulation pump, via the first 3/2-way valve in its first switching position, via the branch flow circuit inlet line, via the second 3-way connector, via the domestic hot water tank or via the heating line, via the third 3-way connector, via the branch flow circuit Drain line, via the first 3-way connector, as well as via the 4/2-way valve and back to the heat pump can be implemented.
  • a flow of the heat transfer fluid from the heat pump, via the circulation pump, via the first 3/2-way valve in its first switching position, via the branch flow circuit inflow line, via the second 3-way connector, via the domestic hot water tank or via the heating line, via the third 3-way connector, via the branch flow circuit drain line, via the first 3-way connector, via the 4/2-way valve via the water-air heat exchanger and back to the heat pump can be implemented.
  • the flow paths described above are particularly dependent on the switching position of the 4/2-way valve, in particular the second and third 3/2-way valves present here which form the 4/2-way valve.
  • a flow of the heat transfer fluid from the heat pump, via the circulation pump, via the first 3-way connector, via the branch flow circuit inflow line, via the first side of the water-water heat exchanger, via the branch flow circuit outflow line, via the first 3/2-way valve in its first switching position, via the 4/2-way valve and back to the heat pump can be realized.
  • a flow of the heat transfer fluid from the heat pump, via the circulation pump, via the first 3-way connector, via the branch flow circuit inflow line, via the first side of the water-water heat exchanger, via the branch flow circuit outflow line, via the first 3/2-way valve in its first switching position, via the 4/2-way valve, via the water-air heat exchanger and back to the heat pump can be realized.
  • the flow paths described above are particularly dependent on the switching position of the 4/2-way valve, in particular the second and third 3/2-way valves that form the 4/2-way valve.
  • a flow of the heat transfer fluid from the heat pump, via the circulation pump, via the first 3/2-way valve in its first switching position, via the branch flow circuit inflow line, via the first side of the water-water heat exchanger, via the branch flow circuit outflow line, via the first 3-way connector, via the 4/2-way valve and back to the heat pump can be realized.
  • the previously described flow paths are particularly dependent on the switching position of the 4/2-way valve, in particular the second and third 3/2-way valves that form the 4/2-way valve.
  • a flow of the heat transfer fluid from the heat pump, via the circulation pump, via the first 3-way connector (cf. Fig. 1a and 2a) or the first 3/2-way valve (cf. Fig. 1b and 2b), in particular via the primary heat source 3/2-way valve, via the primary heat source, via the first 3/2-way valve (cf. Fig. 1a and 2a) or the first 3-way connector (cf. Fig. 1b and 2b), via the 4/2-way valve, via the water-air heat exchanger and back to the heat pump can be realized.
  • a flow of the heat transfer fluid from the primary heat source, via the domestic hot water tank or via the heating line, then in particular via the primary heat source 3/2-way valve, via the heat source pump which is particularly then activated and back to the primary heat source can be realized (cf. Fig.1a, Fig.1b, Fig.2a and Fig.2b).
  • the pipe system has a second and a third 3/2-way valve, each with three connections and two switching positions, namely a second 3/2-way valve, in particular arranged in the heat exchanger inflow line and/or interposed there, and a third 3/2-way valve, in particular arranged in the heat pump inflow line and/or interposed there.
  • the second 3/2-way valve is fluidically connected to the first 3/2-way valve (cf. Fig. 1 a and 2a) or the first 3-way connector (cf. Fig. 1b and 2b), the water-air heat exchanger and the third 3/2-way valve.
  • the third 3/2-way valve is fluidically connected to the water-air heat exchanger, to the second 3/2-way valve and to the heat pump.
  • the second 3/2-way valve enables the heat transfer fluid to flow either from the first 3/2-way valve or from the first 3-way connector to the water-air heat exchanger or to the third 3/2-way valve.
  • the third 3/2-way valve enables the heat transfer fluid to flow either from the water-air heat exchanger or from the second 3/2-way valve to the heat pump.
  • the first and second branch flow circuits and the first heating circuit described above can be implemented using the second and third 3/2-way valves, as well as with a corresponding 4/2-way valve. 3/2-way valves are also inexpensive to purchase and easy to control and/or regulate.
  • the 3/2-way valves mentioned here can preferably be switched from a basic position to a switching position using an electric actuator against a spring force applied by a mechanical spring when the actuator is energized.
  • the 3/2-way valves are then installed in such a way that the 3/2-way valves do not have to be energized for a longer period of time during operation of the central heating system, so that energy is also saved accordingly.
  • the circulation pump could also be arranged outside the first hydraulic module, e.g. integrated into the heat pump or also additionally arranged in the first hydraulic module.
  • At least two, in particular all of the above-mentioned elements and/or components and respective associated connections are arranged and/or formed on a second hydraulic module forming a common structural unit from the group of the following elements and/or components, namely the heat exchanger inflow line at least in sections, the branch flow circuit inflow line at least in sections, the branch flow circuit outflow line at least in sections, the heat pump outflow line at least in sections, the first 3-way connector and the first 3/2-way valve.
  • the following elements and/or components are selected from the group of the following elements and/or components, namely the branch flow circuit inflow line at least in sections, the branch flow circuit outflow line at least in sections, the water-water heat exchanger, the domestic water inflow line at least in sections, the domestic water outflow line at least in sections and the domestic water pump at least two, in particular all of the above-mentioned, elements and/or components and respectively associated connections are arranged and/or formed on a third hydraulic module forming a common structural unit.
  • the assembly and/or construction of the central heating system can be made much easier. Complex assembly can be avoided because the design of the hydraulic modules specifies certain arrangements of elements and/or components in relation to one another or makes them simple and easy for the fitter to recognize.
  • the hydraulic module can then advantageously be pre-assembled, for example, in a factory or by a heating engineer, so that the assembly time for an end customer who operates the central heating system can be greatly reduced.
  • the multiple hydraulic modules make it possible to implement different configurations of the central heating system, e.g. a variant with the primary heat source housing spaced apart from the domestic hot water storage tank housing, without a water-water heat exchanger, whereby this variant then has the first and second hydraulic module.
  • a second variant of the central heating system with the common integral housing for the primary heat source and the domestic hot water storage tank and with the water-water heat exchanger preferably has all three hydraulic modules. Only the first hydraulic module can be used, for example, in a variant of the central heating system in which the brewing water storage tank is connected to the primary heat source via a separate heating circuit with a separate pump.
  • the heat pump control and/or regulating device for supplying energy to the heat pump control and/or regulating device is connected to the central heating control and/or regulating device and/or the heat pump control and/or regulating device for controlling and/or regulating the heating pump is connected to the heating pump in terms of control technology and/or the heat pump control and/or regulating device for controlling and/or regulating the circulation pump is connected to the circulation pump in terms of control technology and/or the heat pump control and/or regulating device for controlling and/or regulating the domestic water pump is connected to the domestic water pump in terms of control technology and/or the central heating control and/or regulating device for controlling and/or regulating the heat source pump is connected to the heat source pump in terms of control technology and/or the heat pump control and/or regulating device for controlling and/or regulating the first 3/2-way valve is connected to the first 3/2-way valve in terms of control technology connected and/or the central heating control and/or regulating device for controlling and/or regulating the primary heat source 3/2-way valve is
  • Essential elements and/or components of the central heating system can therefore be controlled and/or regulated using the heat pump control and/or regulating device. These elements and/or components can therefore also be controlled and/or regulated accordingly depending on the respective output of the heat pump.
  • this also takes into account the fact that the heat pump can be operated primarily as a primary heat source and that the primary heat source can only be activated and/or operated if the heat provided by the heat pump is no longer sufficient in a particular application to cover the heat requirements of the central heating system, in particular the heat requirements of the water-air heat exchanger and/or the domestic hot water storage tank.
  • the energy supply to the heat pump control and/or regulating device could then also be provided directly via a power grid, for example; this should also be noted.
  • the object underlying the invention is also achieved by a method for operating and/or controlling and/or regulating a central heating system with the features of patent claim 21.
  • One aspect of the invention then lies essentially in the fact that the first 3/2-way valve is switched to a first switching position and thus a flow of the heat transfer fluid from the branch flow circuit discharge line to a region of the heat exchanger inflow line that is fluidically facing the water-air heat exchanger and/or the heat pump is enabled in order to supply the heat transfer fluid to the water-air heat exchanger and/or the heat pump from a primary heat source inflow line or from the first side of the water-water heat exchanger, or that the first 3/2-way valve is switched to a second switching position and thus a flow of the heat transfer fluid from a region of the heat exchanger inflow line that is fluidically facing the water-air heat exchanger and/or the Heat pump is fluidically facing area of the heat exchanger inflow line in order to supply the heat transfer fluid to the water-air heat exchanger and/or the heat pump from a primary heat source outflow line and thus to fluidically bypass the heating line and/or the water-water heat exchanger.
  • the object underlying the invention is also achieved by a method for operating and/or controlling and/or regulating a central heating system with the features of patent claim 22.
  • One aspect of the invention then lies essentially in the fact that the first 3/2-way valve is switched to a first switching position and thus a flow of the heat transfer fluid from a region of the heat pump discharge line fluidically upstream of the first 3/2-way valve into a branch flow circuit inflow line is enabled in order to supply the heat transfer fluid from the heat pump to a heating line or the first side of a water-water heat exchanger, or that the first 3/2-way valve is switched to a second switching position and thus a flow of the heat transfer fluid from the region of the heat pump discharge line fluidically upstream of the first 3/2-way valve to a primary heat source inflow line is enabled in order to supply the heat transfer fluid to the primary heat source and in particular thus to bypass the heating line and/or the water-water heat exchanger in terms of flow.
  • Whether the domestic water is heated using the energy provided by the heat pump can be implemented particularly easily in terms of control technology in these two ways, namely in particular by switching the respective first 3/2-way valve to its first switching position.
  • the actuator of this respective first 3/2-way valve must then be energized for this purpose.
  • the first 3/2-way valve In its "de-energized" state, the first 3/2-way valve is preferably in its second switching position.
  • Check valves are also provided in certain lines or flow connections to prevent backflow of the heat transfer fluid; this should also be mentioned. In this regard, reference should also be made in particular to the figures.
  • the first actual domestic water temperature is measured, determined and/or calculated, in particular by a heat pump control and/or regulating device, using the first temperature sensor in a - viewed vertically - lower area of the domestic water storage tank.
  • the heat pump is controlled and/or regulated by means of a heat pump control and/or regulation device depending on the determined actual domestic water temperature.
  • the temperature of the domestic water is controlled and/or regulated particularly well by means of the heat pump and the heat pump control and/or regulation device.
  • the heat pump is controlled and/or regulated particularly quickly, in particular without a long time delay when fresh and therefore particularly cold domestic water is then fed back into the domestic water tank due to domestic water being withdrawn from the domestic water tank, for example for a shower, in particular because the domestic water fed in flows around the temperature sensor before it mixes with the rest of the domestic water still present in the domestic water tank.
  • the first actual domestic water temperature is transmitted to the heat pump control and/or regulating device and/or determined and/or calculated by means of the heat pump control and/or regulating device.
  • the second, preferably average, actual domestic water temperature is measured, determined and/or calculated by means of the second temperature sensor in a - viewed vertically - middle or upper area of the domestic water tank.
  • the second actual domestic water temperature is transmitted to the central heating control and/or regulating device and/or determined and/or calculated by means of the central heating control and/or regulating device.
  • the primary heat source is controlled and/or regulated by means of the central heating control and/or regulating device depending on the second actual domestic water temperature.
  • the specific arrangement of the two temperature sensors enables the entire central heating system to be optimally controlled and/or regulated in order to minimize the need for fuel for the primary heat source.
  • the fact that the first temperature sensor determines a lower actual domestic water temperature than the second temperature sensor due to the temperature stratification of the domestic water in the domestic water tank means that the entire central heating system can be optimally controlled, even if the central heating control and/or regulation device or heat pump control and/or regulation device is designed independently of one another, with the heat pump being operated in particular preferably upstream of the primary heat source. The need for fuel for the primary heat source can thus be minimized or reduced.
  • the first temperature sensor - viewed vertically - is provided and/or arranged in particular in the lower half and the second temperature sensor - viewed vertically - is provided and/or arranged in the upper half of the domestic hot water tank or in the corresponding lower or upper vertical area of the total vertical height of the domestic hot water tank.
  • the heat pump is operated and/or activated with the aid of the heat pump control and/or regulating device for heating the heat transfer fluid and the first 3/2-way valve is switched to its first switching position with the aid of the heat pump control and/or regulating device when the first actual domestic water temperature measured, determined and/or calculated with the aid of the first temperature sensor falls below a first limit temperature.
  • the primary heat source is operated and/or activated with the aid of the central heating control and/or regulating device for heating the heat transfer fluid and in particular the primary heat source 3/2-way valve is switched to a first switching position with the aid of the central heating control and/or regulating device for connecting the heating line to the primary heat source via the primary heat source inflow line and/or the heat source pump is operated and/or activated with the aid of the central heating control and/or regulating device when the second actual domestic water temperature measured, determined and/or calculated with the aid of the second temperature sensor falls below a second limit temperature.
  • the heat pump is preferentially operated in a particularly simple manner, whereby in particular the first and second limit temperatures are selected accordingly.
  • the first and second limit temperatures are selected such that the primary heat source is only operated and/or activated with the aid of the central heating control and/or regulating device for heating the heat transfer fluid, in particular the primary heat source 3/2-way valve is switched to its first switching position, and in particular the heat source pump is only operated and/or activated when a heat requirement of the domestic water storage tank exceeds a quantity of heat that can be provided by the heat pump at maximum output of the heat pump or, in other words, when the output of the heat pump alone is no longer sufficient to heat the domestic water to the desired temperature.
  • the heat requirement of the domestic hot water storage tank is preferably determined indirectly by selecting the limit temperatures in relation to other relevant parameters such as the size of the domestic hot water storage tank.
  • the heat pump and/or the circulation pump are controlled and/or regulated by means of the heat pump control and/or regulation device, in particular additionally, as a function of a first actual heat transfer fluid temperature formed at the outlet of the heat pump and/or as a function of a first target heat transfer fluid temperature predetermined for the outlet of the heat pump.
  • the heat pump has an internal fluid circuit through which a coolant flows, which evaporates at low pressure while adding heat and, after being compressed to a higher pressure, condenses again while releasing heat to the heat transfer fluid.
  • the heat pump requires an evaporator, a compressor, a condenser and a throttle.
  • the gaseous coolant is compressed in the compressor and in particular heats up in the process.
  • the hot, compressed coolant then gives off its heat to the heat transfer fluid in the condenser.
  • the compressed coolant cools down and in particular condenses at least partially to liquid coolant. When it then flows through the throttle, the coolant is expanded and in particular partially cooled further.
  • the then cold coolant then flows through the evaporator - usually located outside the building.
  • the cold coolant is heated by groundwater or the outside air, for example, and evaporates in the process.
  • the coolant is then fed back to the compressor and the process begins again.
  • the heat pump is preferably designed as an air-water heat pump, in which the coolant in the evaporator is heated by means of the outside air.
  • the evaporator, the compressor, the condenser and the throttle are also preferably designed as a common structural unit, with the heat pump inlet line and the heat pump outlet line being connected in particular to the condenser of the heat pump.
  • the primary heat source and/or the heat source pump is controlled by means of the central heating control and/or regulating device as a function of a second actual heat transfer fluid temperature - which forms within or in the area of the primary heat source - and/or as a function of a second target heat transfer fluid temperature specified for the inner area of the primary heat source is controlled and/or regulated.
  • the second target heat transfer fluid temperature is below the first target heat transfer fluid temperature or is set accordingly such that the primary heat source is only operated and/or activated with the aid of the central heating control and/or regulating device for heating the heat transfer fluid when a heat requirement of the central heating system, in particular a heat requirement of the water-air heat exchanger and/or the domestic hot water storage tank, exceeds a quantity of heat that can be provided by the heat pump at maximum output of the heat pump.
  • the heat pump can therefore be operated as a primary heat source even when the domestic water in the domestic water tank is not being heated by means of the heat transfer fluid and the heat transfer fluid is flowing through the first heating circuit mentioned above. Overall, in particular spread over the year, the fuel requirement of the central heating system can thus be further reduced.
  • the heat requirement of the central heating system in particular of the water-air heat exchanger and/or the domestic water tank, is preferably determined indirectly, in particular via the selection/setting of the two target heat transfer fluid temperatures. Such a heat requirement of the water-air heat exchanger is also dependent in particular on a desired room temperature of a room to be heated with the water-air heat exchanger.
  • Fig.1a shows a schematic representation of a hydraulic circuit diagram of a first
  • Fig.1b shows a schematic representation of a hydraulic circuit diagram of a second
  • Fig.2a shows a schematic representation of a hydraulic circuit diagram of a third
  • Fig.2b shows a schematic representation of a hydraulic circuit diagram of a fourth
  • Fig.3a shows a schematic representation of a domestic water storage tank for use in the first or second embodiment of the central heating system in an enlarged side view
  • Fig.3b shows a schematic representation of a domestic water storage tank for use in the third or fourth embodiment of the central heating system in an enlarged side view
  • Fig.4 shows a schematic flow chart for a method for operating and/or controlling and/or regulating a heat pump of the central heating system according to Fig.1a, Fig.1b, Fig.2a or Fig.2b
  • Fig.5 shows a schematic flow chart for a method for operating and/or controlling and/or regulating a primary heat source of the central heating system according to Fig.1a, Fig.1b, Fig.2a or Fig.2b,
  • Fig.6a shows a schematic representation of a dependency of a first target heat transfer fluid temperature, a first limit temperature, a second target heat transfer fluid temperature or a second limit temperature on the outside temperature, wherein the first limit temperature is lower than the second limit temperature, and
  • Fig.6b shows a schematic representation of a dependency of a first target heat transfer fluid temperature, a first limit temperature, a second target heat transfer fluid temperature or a second limit temperature on the outside temperature, wherein the first limit temperature is greater than the second limit temperature.
  • Fig. 1a, Fig. 1b, Fig. 2a and Fig. 2b each show a central heating system 1 with at least one primary heat source 2 that can be operated with the aid of fuels, in particular a gas boiler or a heating boiler, with at least one electrically operated heat pump 3, with at least one water-air heat exchanger 4, preferably a heating element or a radiator for heating a building, and with at least one domestic water storage tank 5, in particular a boiler, for temporarily storing domestic water 11.
  • the water-air heat exchanger 4 could also be designed by means of or as an underfloor heating system.
  • primary heat source 2 that can be operated with fuels also include, for example, a “heating boiler”, in particular an oil boiler that can be operated with oil or a gas boiler that can be operated with gas.
  • a commercially available, so-called gas boiler is considered here, such as the one used separately in each apartment in an apartment building.
  • a heat transfer fluid 6, in particular water, can be heated by means of the primary heat source 2 and/or with the aid of the heat pump 3.
  • the heat transfer fluid 6 can be conveyed for heating by the heat pump 3 and/or, in particular for heating, by the primary heat source 2.
  • a heat exchanger inflow line LWT, ZU of the line system 7 is fluidically connected on the one hand to the primary heat source 2 and on the other hand to the water-air heat exchanger 4 and/or connected accordingly, so that the heat transfer fluid 6 can be fed to the water-air heat exchanger 4 through the heat exchanger inflow line LWT, ZU .
  • a heat pump inflow line L W p, to the line system 7 is fluidically connected on the one hand to the water-air heat exchanger 4 and on the other hand to the heat pump 3 and/or connected accordingly, so that the heat transfer fluid 6 can be fed to the heat pump 3 through the heat pump inflow line L W p,.
  • a heat pump drain line L W p, ab of the pipe system 7 is fluidically connected on the one hand to the heat pump 3 and on the other hand to the primary heat source 2 and/or connected accordingly, so that the heat transfer fluid 6 can be supplied through the heat pump drain line LWP, ab to the primary heat source 2.
  • the water-air heat exchanger 4 and the heat pump 3 are connected in series with respect to the primary heat source 2, in particular in terms of flow, or can be connected in series.
  • the heat transfer fluid 6 can be conveyed by means of the circulation pump 9 both through the heat pump 3 and through the water-air heat exchanger 4, so that the use of the heating pump 8 is not absolutely necessary.
  • the heating pump 8 is therefore shown as optional with dashed lines.
  • a - first - 3/2-way valve 21.1 is arranged in the heat exchanger inflow line LWT, ZU according to Fig.1a and Fig.2a and/or is interposed here.
  • a - first - 3-way connecting piece 26.1 is arranged in the heat pump outflow line LWP, ab according to Fig.1a and Fig.2a and/or is interposed here.
  • the - first - 3-way connector 26.1 is arranged in the heat exchanger inflow line L W T, ZU according to Fig.1 b and Fig.2b according to the embodiments shown therein and/or interposed here.
  • the - first - 3/2-way valve 21.1 is arranged in the heat pump drain line L WP ,ab according to Fig.1 b and Fig.2b and/or interposed here.
  • a 3-way connector is used to fluidically connect three lines to one another and thus has three connections, one of which can also be referred to as a branch.
  • a 3/2-way valve also has three connections, one of which can be referred to as a branch, whereby two different flow paths can also be implemented through the 3/2-way valve using a 3/2-way valve.
  • a 3/2-way valve can be switched to two switching positions.
  • the heat transfer fluid 6 can be conveyed through the branch flow circuit KAB by means of the at least one pump 8, 9, 9b and the service water 11 can be heated with the aid of the heat transfer fluid 6 flowing through the branch flow circuit KAB.
  • the heat transfer fluid 6 can be conveyed through the branch flow circuit KAB and in a second switching position of the first 3/2-way valve 21.1, the flow of the heat transfer fluid 6 through the branch flow circuit KAB can in particular be at least partially avoided.
  • the flow path through the first 3/2-way valve 21.1 that can be realized in the first switching position of the first 3/2-way valve 21.1 is symbolized by the curved arrow and a Roman numeral I.
  • the flow path through the first 3/2-way valve 21.1 that can be realized in the second switching position of the first 3/2-way valve 21.1 is symbolized by the straight arrow and a Roman numeral II.
  • a heating line LHZ is arranged and/or formed within the domestic water storage tank 5, within a wall of the domestic water storage tank 5 and/or on the outside of the wall of the domestic water storage tank 5, so that when the heat transfer fluid 6 flows through the heating line LHZ, the domestic water 11 then present in the domestic water storage tank 5 can be heated by means of the heat transfer fluid 6.
  • a primary heat source drain line L PQ , a b of the pipe system 7 is fluidically connected on the one hand to the primary heat source 2 and on the other hand to the heating line LHZ and/or connected accordingly, so that the heat transfer fluid 6 can be supplied through the primary heat source drain line L PQ , ab to the heating line LHZ
  • a primary heat source inflow line l_ PQ , zu of the pipe system 7 is fluidically connected on the one hand to the heating line LHZ and on the other hand to the primary heat source 2 and/or is connected accordingly, so that the heat transfer fluid 6 can be fed to the primary heat source 2 through the primary heat source inflow line LQ, ZU .
  • G via the heat source pump 9b and back to the primary heat source 2, can thus also be implemented in particular with the primary heat source outflow line LPQ, ab, with the aid of the heating line LHZ and with the primary heat source inflow line L PQ .
  • the heat transfer from the heat transfer fluid 6 to the domestic water 11 takes place here in particular by means of the heating line LHZ, which preferably runs in a spiral shape through the domestic water tank 5 and through which the heat transfer fluid 6 can be passed.
  • the heating line LHZ could also run in a different way, e.g. in an arc shape through the domestic water tank 5.
  • a heating line which preferably runs in a meandering shape, is arranged and/or designed in a wall of the domestic water tank 5 in order to enable the heat transfer from the heat transfer fluid 6 to the domestic water 11 by flowing through this heating line by means of the heat transfer fluid 6.
  • heating lines for this heat transfer could be arranged on the outside of the wall of the domestic water tank 5, wherein these lines are then insulated in particular on a side facing away from the domestic water tank 5.
  • the heat exchanger inflow line LWT, zu is fluidically connected to the primary heat source outflow line L PQ , ab and/or fluidically connected to the primary heat source outflow line LQ, a b.
  • the heat pump outflow line L W p, ab is fluidically connected to the primary heat source inflow line LQ, ZU and/or fluidically connected to the primary heat source inflow line L PQ , zu , in particular with the aid of the primary heat source 3/2-way valve 21.G.
  • the primary heat transfer fluid 6 coming from the domestic hot water tank 5 can be fed to the primary heat source 2.
  • the heat transfer fluid 6 coming from the heat pump 3 can be fed to the primary heat source 2.
  • the above statements essentially apply to all embodiments of Fig. 1a, 1b, 2a and 2b.
  • the heat transfer fluid coming from a water-air heat exchanger can be fed 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 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 II.
  • a branch flow circuit inflow line LSK, ZU of the branch flow circuit KAB is fluidically connected to the primary heat source outflow line Lpo, a b and/or connected to the primary heat source outflow line L PQ, a b via the first 3-way connecting piece 26.1 and via a second 3-way connecting piece 26.2 arranged in the primary heat source outflow line LPQ , ab and/or interposed therein.
  • a branch flow circuit drain line LSK, ab of the branch flow circuit KAB is fluidically connected to the first 3/2-way valve 21.1 and via a third 3-way connecting piece 26.3 to the primary heat source inflow line LPQ, ZU and/or connected to the primary heat source inflow line LP Q , ZU .
  • a branch flow circuit inflow line LSK, ZU of the branch flow circuit KAB is fluidically connected to the primary heat source outflow line LPQ, a b via the first 3/2-way valve 21.1 and via a second 3-way connector 26.2 arranged in the primary heat source outflow line LPQ, a b and/or connected therebetween with the primary heat source outflow line LPQ, a b.
  • a branch flow circuit outflow line LSK, ab of the branch flow circuit KAB is connected to the first 3-way connector 26.1 and via a third 3-way connector 26.3 to the Primary heat source inflow line LPQ, ZU fluidically connected and/or connected to the primary heat source inflow line L PQ , ZU .
  • the above-mentioned connections of the branch flow circuit inflow line LSK, ZU and the branch flow circuit outflow line LSK, ab are particularly easy to make or can be implemented in a simple manner because 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.
  • 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 water storage tank housing 5.G (cf. Fig. 1a and 1b).
  • a non-return valve (not further specified) is also arranged in the primary source outflow line L PQ , a b between the second 3-way connecting piece 26.2 and the primary heat source 2.
  • 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 inflow line LSK, ZU of the branch flow circuit KAB is fluidically connected to a first side 27.1 of the water-water heat exchanger 27 and/or connected here, so that the heat transfer fluid 6 can be fed to the first side 27.1 through the branch flow circuit inflow line LSK, ZU.
  • the branch flow circuit drain line LSK, ab of the branch flow circuit KAB is fluidically connected to the first side 27.1 and/or connected here, so that the heat transfer fluid 6 can be discharged through the branch flow circuit drain line LSK, ab from the first side 27.1.
  • a service water drain line LBW, ab is fluidically connected on the one hand to the service water storage tank 5 and on the other hand to a second side 27.2 of the water-water heat exchanger 27 and/or connected accordingly, so that the service water 11 can be fed through the service water drain line LBW, ab from the service water storage tank 5 to the second side 27.2 with the aid of a service water pump 10.
  • a service water inflow line LBW, ZU is fluidically connected and/or connected accordingly on the one hand to the service water storage tank 5 and on the other hand to the second side 27.2, so that the service water 11 can be supplied to the service water storage tank 5 from the second side 27.2 through the service water inflow line LBW, ZU .
  • a hot water pipe 17a is then fluidically connected to the domestic water drain pipe LBW, ab and/or connected to the domestic water drain pipe LBW, ab.
  • a cold water pipe 17b is fluidically connected to the domestic water inflow pipe LBW, ZU and/or connected to the domestic water inflow pipe LBW, ZU .
  • Fresh, “cold” domestic water 11 can be fed to the domestic water tank 5 via the cold water pipe 17b, in particular during or after domestic water 11, e.g. for a shower, has been taken from the domestic water tank 5, in order to refill the domestic water tank 5 via the cold water pipe 17b.
  • the domestic water 11 can be heated via the water-water heat exchanger 27, in particular with the help of the heat pump 3.
  • the water-water heat exchanger 27 is used in particular when a "direct" connection of the heat pump 3 to the heating line LHZ of the domestic water storage tank 5 would not be possible or would only involve too much effort.
  • the primary heat source 2 and the domestic water storage tank 5 have a common integral housing 28, as shown in Fig. 2a and Fig. 2b.
  • the heating line LHZ, the primary heat source drain line Lpo, a b and the primary heat source inflow line LPQ, ZU in particular each completely, are arranged within the integral housing 28 and are therefore not easily accessible.
  • 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 arranged in terms of flow in an area of the pipe system 7 assigned to the respective unit 2, 3, 4 or in a partial pipe area having the respective unit 2, 3, 4.
  • a branch flow circuit KAB according to the embodiment shown in Fig.1a 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-way connector 26.1, via the branch Flow circuit inflow line LSK. ZU, via the second 3-way connector 26.2, via the domestic hot water tank 5 or via the heating line LHZ, via the third 3-way connector 26.3, via the branch flow circuit outflow line LsK, at>, via the first 3/2-way valve 21.1 in its first switching position, as well as via the 4/2-way valve 20 and back to the heat pump 3.
  • a flow of the heat transfer fluid 6 from the heat pump 3, via the circulation pump 9, via the first 3-way connector 26.1, via the branch flow circuit inflow line LSK is also possible.
  • a branch flow circuit KAB according to the embodiment shown in Fig.1 b 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, via the branch flow circuit inflow line LSK. ZU, via the second 3-way connecting piece 26.2, via the domestic hot water tank 5 or via the heating line LHZ, via the third 3-way connecting piece 26.3, via the branch flow circuit drain line LsK. ab, via the first 3-way connecting piece 26.1, as well as via the 4/2-way valve 20 and back to the heat pump 3 can be realized.
  • a further branch flow circuit KAB according to the embodiment shown in Fig.2a 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-way connector 26.1, via the branch flow circuit inflow line LSK, ZU, via the first side 27.1 of the water-water heat exchanger 27, via the branch flow circuit outflow line LSK, ab, via the first 3/2-way valve 21.1 in its first switching position, via the 4/2-way valve 20 and back to the heat pump 3 can be realized.
  • a further branch flow circuit KAB according to the embodiment shown in Fig.2b 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, via the branch flow circuit inflow line LSK, to, via the first side 27.1 of the water-water heat exchanger 27, via the branch flow circuit outflow line LSK, from, via the first 3-way connecting piece 26.1, via the 4/2-way valve 20 and back to the heat pump 3 can be realized.
  • the domestic water 11 can be heated “directly” in particular with the aid of the heating line.
  • the domestic water 11 can be heated "indirectly” in particular with the aid of the water-water heat exchanger 27.
  • either the domestic water 11 or the water-air heat exchanger 4 is heated during operation by means of the central heating system 1.
  • Only the heating of the water-air heat exchanger 4 is made possible by the formation of a first heating circuit, wherein in the first heating circuit a flow of the heat transfer fluid 6 from the heat pump 3, via the circulation pump 9, via the first 3-way connecting piece 26.1 according to Fig.1a or 2a or via the first 3/2-way valve 21.1 according to Fig.1b or 2b in its second switching position, in particular via the primary heat source 3/2-way valve 21.G in a second valve position, in particular via the heat source pump 9b, via the primary heat source 2, via the first 3/2-way valve 21.1 according to Fig.1a or 2a in its second switching position or via the first 3-way connecting piece according to Fig.1b or 2b, via the 4/2-way valve 20, via the water-air heat exchanger 4 and back to Heat pump 3 can be implemented.
  • the heat transfer fluid 6 preheated by means of the heat pump 3 can thus be completely fed to the primary heat source 2.
  • the heat transfer fluid 6 can be heated by means of the heat pump 3 and the primary heat source 2.
  • the heat transfer fluid 6 can also 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.
  • a flow of the heat transfer fluid 6 can be realized from the primary heat source 2, via the domestic hot water tank 5 or via the heating line LHZ, in particular via the primary heat source 3/2-way valve 21.G, 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 KAB can also be realized using only the circulation pump 9.
  • the respective branch flow circuit KAB and the second heating circuit can also 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.
  • the respective branch flow circuit KAB and the second heating circuit run partly in parallel with a division of the flow of the heat transfer fluid 6 in the third 3-way connecting piece 26.3 and a merging of the flow of the heat transfer fluid 6 in the second 3-way connecting piece 26.2.
  • the respective branch flow circuit KAB and the second heating circuit or the respective flow paths that can be realized thereby are in particular completely separated from one another.
  • the heat transfer fluid 6 may flow from the heat pump 3, via the circulation pump 9, via the first 3-way connecting piece 26.1 according to Fig.1 a or via the first 3/2-way valve 21.1 in its second switching position according to Fig.1 b, in particular via the primary heat source 3/2-way valve 21.
  • 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.
  • the following may be noted for the positioning and/or arrangement of the check valves provided and/or arranged here in the line system 7 for the realization of the previously described flow paths and/or flow circuits:
  • a first check valve 29 which is arranged in each case in the branch flow circuit inflow line LSK, ZU.
  • a second check valve 30 is arranged at the corresponding position shown in Figs. 1a and 1b in the primary heat source outflow line L PQ , a b, in particular in terms of flow before the second 3-way connector 26.2 and in terms of flow after the branch of the heat exchanger inflow line LWT, ZU from the primary source outflow line L PQ , ab .
  • a second check valve 31 is also arranged in the service water discharge line LBW, ab, in particular in terms of flow upstream of the service water pump 10.
  • the respective first and second check valves 29, 30 or 29 and 31 prevent a corresponding backflow of the heat transfer fluid 6 or the service water 11.
  • the designation "first” or “second” check valve is not restrictive, but this designation / numbering of the check valves merely serves to designate them in more detail, and this may also be pointed out.
  • a central heating control and/or regulating device 12 is connected to the primary heat source 2 for the control and/or regulation thereof.
  • a temperature sensor 13.1 is arranged in a - viewed vertically - lower area of the domestic hot water tank 5 or adjacent to this - viewed vertically - lower area of the domestic hot water tank 5 for determining the actual domestic hot water temperature TBI.
  • the temperature sensor 13.1 is connected to a heat pump control and/or regulating device 14 for control/signal/and/or data purposes.
  • the heat pump 3 is connected to the heat pump control and/or regulating device 14 for control purposes.
  • the heat pump control and/or regulating device 14 is designed and/or constructed such that the heat pump 3 can be controlled and/or regulated depending on the determined actual domestic hot water temperature TBI.
  • the temperature sensor 13.1 could penetrate a wall of the domestic water tank 5, so that a measuring range of the temperature sensor 13.1 is arranged within the domestic water tank 5 with direct contact to the domestic water 11.
  • the temperature sensor 13.1 - as can be seen in Fig. 3a and Fig. 3b - is arranged in or on a part of a domestic water inflow line LBW, ZU, in particular by means of a T-piece 18, formed between an inflow valve 15 and an inflow connection 16 of the domestic water storage tank 5.
  • the measuring range of the temperature sensor 13.1 is in direct contact with the domestic water 11.
  • the T-piece 18 is interposed in the domestic water inflow line LBW, ZU according to Fig. 3a and Fig.
  • the temperature sensor 13.1 preferably penetrates the T-piece 18 completely and, according to Fig.3a and Fig.5b, despite the arrangement on the T-piece 18, is arranged with its measuring range within the domestic water storage tank 5.
  • the measuring range of the temperature sensor 13.1 is arranged within the domestic water inflow line LBW, ZU, in particular within the T-piece 18.
  • the temperature sensor 13.1 it would also be entirely conceivable for the temperature sensor 13.1 to be arranged on the outside of the wall of the domestic water storage tank 5 or on the outside of the domestic water inflow line LBW, wherein when determining the actual domestic water temperature T B I by means of the heat pump control and/or regulating device 14, a temperature gradient occurring across the wall of the domestic water storage tank 5 or across a wall of the domestic water inflow line LBW is preferably taken into account.
  • the arrangement of the temperature sensor 13.1 symbolized in Fig.1a, Fig.1b, Fig.2a and Fig.2b basically includes all variants described above.
  • the domestic water inflow line LBW, ZU and the cold water line 17b are implemented with one and the same component, so there is no difference between the domestic water inflow line LBW, ZU and the cold water line 17b.
  • the domestic water drain line LBW, ab and the hot water line 17a are implemented with one and the same component, so there is no difference between the domestic water drain line LBW, ab and the hot water line 17a.
  • the cold water pipe 17b is connected to the service water inlet pipe LBW, in particular by means of a 3-way connector. Furthermore, the hot water pipe 17a is connected to the domestic water drain pipe LBW, ZU , in particular by means of a 3-way connector.
  • a check valve 15.r is integrated and/or arranged in the cold water line 17b or interposed here in order to prevent a backflow of the domestic water 11 from the domestic water storage tank 5 into the cold water line 17b even when the inflow valve 15 is open.
  • the domestic water storage tank 5 according to Fig.3a can be used in particular in the first and second embodiments of the central heating system 1 from Fig.1a and Fig.1b.
  • the domestic water storage tank 5 according to Fig.3b is intended for use in the third and fourth embodiments of the central heating system 1 from Fig.2a and Fig.2b.
  • domestic water 11 can be fed to the T-piece 18 not only from the inflow valve 15, but also from the second side 27.2 of the water-water heat exchanger 27, in particular via a 3-way connecting piece arranged between the T-piece 18 and the inflow valve 15 or interposed here.
  • the temperature sensor 13.1 is designed as a first temperature sensor 13.1 for determining a first actual domestic water temperature TBI.
  • a second temperature sensor 13.2 is arranged in a - viewed vertically - middle or upper area of the domestic water tank 5 for measuring a second, preferably average actual domestic water temperature TB2.
  • the second temperature sensor 13.2 is connected to the central heating control and/or regulating device 12 for control/signal/and/or data purposes.
  • the central heating control and/or regulating device 12 is designed and/or constructed such that the primary heat source 2 can be controlled and/or regulated depending on the second actual domestic water temperature TB2.
  • the two temperature sensors 13.1 and 13.2 are referred to as the first and second temperature sensors only for the sake of clear assignment.
  • the designation first and second temperature sensors therefore does not represent a dependency on one another and is not to be viewed as restrictive. Another clear designation for the two respective temperature sensors would also be conceivable.
  • the second temperature sensor 13.2 could also penetrate a wall of the domestic water tank 5, so that a measuring range of the second temperature sensor 13.2 would be arranged within the domestic water tank 5 with direct contact to the domestic water 11. In contrast, the second temperature sensor 13.2 could also be arranged on the outside of the wall of the domestic hot water tank 5.
  • the heat pump control and/or regulating device 14 is designed and/or constructed such that the heat pump 3 can be operated and/or activated with the aid of the heat pump control and/or regulating device 14 to heat the heat transfer fluid 6 when the first actual domestic water temperature TBI measured, determined and/or calculated with the aid of the first temperature sensor 13.1, in particular by the heat pump control and/or regulating device 14, falls below a first limit temperature TBIG.
  • 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 B 2 measured, determined and/or calculated with the aid of the second temperature sensor 13.2 falls below a second limit temperature T B2 G.
  • control and/or regulation of the heat pump 3 and the primary heat source 2 takes place independently of one another, which means in particular that no parameters and/or measured values for the control of the primary heat source 2, such as a level of fuel supply, are then available in the heat pump control and/or regulation device 14.
  • 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, with the control of the heat pump taking 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 only through the selection of the two limit temperatures TBIG, T B2 G in relation to one another and through the specific arrangement of the associated two temperature sensors 13.1, 13.2 in relation 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 water tank 5 in relation to the total vertical height of the domestic water tank 5, or the respective actual temperatures of the domestic water 11 are then determined there.
  • the first limit temperature T B I G is smaller than the second limit temperature T B2 G-
  • the second limit temperature T B 2G could also be lower than the first limit temperature TBIG.
  • the second limit temperature T B2 G can then be set to be 3°C to 7°C, in particular 5°C lower than the first limit temperature TBIG-
  • the output of the heat pump 3 can be continuously adjusted 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, in particular between 0 kW and 25 kW, in particular between 1.5 kW and 7 kW.
  • the maximum output of the primary heat source 2 is, for example, 17 kW, whereby the output of the primary heat source 2 is preferably also continuously adjustable.
  • a primary heat source 2 with a maximum output of 15 kW is used in combination with a heat pump 3 with a maximum output of 7 kW, so that a maximum of 22 kW is available by means of the central heating system 1 when the primary heat source 2 and the heat pump 3 are operating simultaneously, which is also sufficient to supply typical residential buildings with heat.
  • the line system 7 has at least one 4/2-way valve 20 which is arranged and/or functionally effective in terms of flow technology between the first 3/2-way valve 21.1 according to Fig.1a or Fig.2a or the first 3-way connecting piece 26.1 according to Fig.1b or Fig.2b on the one hand and the water-air heat exchanger 4 and the heat pump 3 on the other hand, with the aid of which the heat transfer fluid 6 can be guided and/or guided to the water-air heat exchanger 4 or past the water-air heat exchanger 4, in particular directly to the heat pump 3.
  • the 4/2-way valve 20 is shown in Fig.1a, Fig.1b, Fig.2a and Fig.2b initially as a single 4/2-way valve 20 with dashed lines, but in particular in the very preferred embodiment, which is described in more detail below, two 3/2-way valves 21.1, 21.2 can be used or are present accordingly, in particular in order to then realize the functionally effective 4/2-way valve 20 accordingly.
  • the line system 7 therefore has in particular (as an alternative to a single, in particular complexly designed 4/2-way valve 20) in the preferred embodiment two 3/2-way valves 21.2, 21.3, each with three connections and two switching positions, namely a second 3/2-way valve 21.2, which is arranged in particular in the heat exchanger inflow line LWT, ZU and/or interposed therein, and a third 3/2-way valve 21.2, which is arranged in particular in the heat pump inflow line L W p, ZU and/or interposed therein,
  • the second 3/2-way valve 21.2 is fluidically connected to the first 3/2-way valve 21.1 according to Fig.1 a or Fig.2a or to the first 3-way connector 26.1 according to Fig.1 b or Fig.2b, the water-air heat exchanger 4 and to the third 3/2-way valve 21.3.
  • the third 3/2-way valve 21.3 is fluidically connected to the water-air heat exchanger 4, to the second 3/2-way valve 21.2 and to the heat pump 3.
  • a flow of the heat transfer fluid 6 from the first 3/2-way valve 21.1 according to Fig.1 a or Fig.2a or with the first 3-way connecting piece 26.1 according to Fig.1 b or Fig.2b to the water-air heat exchanger 4 or to the third 3/2-way valve 21.3 is optionally possible.
  • a flow of the heat transfer fluid 6 from the water-air heat exchanger 4 or from the second 3/2-way valve 21.2 to the heat pump 3 is optionally possible.
  • the 4/2-way valve 20 or the 3/2-way valves 21.2 and 21.3 are connected in terms of control technology in particular to the heat pump control and/or regulating device 14 or the corresponding switching positions of the 4/2-way valve 20, in particular the switching positions of the 3/2-way valves 21.2 and 21.3, can be set or switched accordingly with the aid of the heat pump control and/or regulating device 14.
  • the switching positions of the previously described 4/2-way valve 20 are then also controlled or switched accordingly, in particular with the aid of the heat pump control and/or regulating device 14.
  • Such a 4/2-way valve 20 could also be functionally effective using only one 3/2-way valve and a 3-way connector fluidically connected to this 3/2-way valve. It would therefore also be conceivable to replace one of the two 3/2-way valves 21.2 or 21.3 with a 3-way connector to form the 4/2-way valve 20.
  • the heat exchanger inflow line LWT, ZU at least in sections, the heat pump inflow line L W p, zu at least in sections, the heat pump outflow line L W p, ab at least in sections, the 4/2-way valve 20, in particular the second 3/2-way valve 21.2 and the third 3/2-way valve 21.3 at least two, in particular all, elements and/or components and respective associated connections are arranged and/or formed on a first hydraulic module 22.1 forming a common structural unit.
  • the respective aforementioned lines can also be formed in sections in this first hydraulic module 22.1.
  • the heat exchanger inflow line LWT, ZU at least in sections From the group of the following elements and/or components, namely the heat exchanger inflow line LWT, ZU at least in sections, the branch flow circuit inflow line LSK, ZU at least in sections, the branch flow circuit outflow line LSK, ab at least in sections, the heat pump outflow line L W p, ab at least in sections, the first 3-way connector 26.1 and the first 3/2-way valve 21.1, at least two, in particular all, elements and/or components and respective associated connections are arranged and/or formed on a second hydraulic module 22.2 forming a common structural unit.
  • the respective previously mentioned lines can now be formed in sections in this second hydraulic module 22.2.
  • the branch flow circuit inflow line LSK to at least in sections, the branch flow circuit outflow line LSK, from at least in sections, the water-water heat exchanger 27, the service water inflow line L B w, to at least in sections, the service water outflow line LBW, from at least in sections and the service water pump 10
  • at least two, in particular all, elements and/or components and respective associated connections are arranged and/or formed on a third hydraulic module 22.3 forming a common structural unit.
  • the respective previously mentioned lines can now be formed in sections in this third hydraulic module 22.3.
  • the hydraulic modules 22.1, 22.2, 22.3 are symbolized with dash-dotted lines according to Fig.1a, Fig.1b, Fig.2a and 2b.
  • the one 4/2-way valve 20 or the two 3/2-way valves 21.2, 21.3 are also part of the first hydraulic module 22.1.
  • the circulation pump 9 can also be installed outside the first hydraulic module 22.1. be arranged, e.g. within/as part of the heat pump 3.
  • the hydraulic modules 22.1, 22.2, 22.3 are preferably pre-assembled in a factory and/or by a heating engineer, so that the assembly effort on site, in an end customer's building, can be reduced and simple and cost-effective assembly is possible.
  • the heat pump control and/or regulating device 14 is connected to the central heating control and/or regulating device 12 to supply energy to the heat pump control and/or regulating device 14.
  • a connection to a power grid is also conceivable.
  • the heat pump control and/or regulating device 14 is connected to the heating 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 circulating 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 4/2-way valve 20, in particular the second and third 3/2-way valve 21 .2 or 21 .3, is connected for control purposes to the 4/2-way valve 20 and/
  • the heat pump control and/or regulating device 14 is effectively connected for control purposes/signal purposes and/or data purposes to the first temperature sensor 13.1.
  • the central heating control and/or regulating device 12 is connected for control purposes to the heat source pump 9b and/or the central heating control and/or regulating device 12 is connected for control purposes to the primary heat source 3/2-way valve 21 .G for control purposes/or regulation.
  • the heat transfer fluid 6, in particular water, is heated by means of the primary heat source 2 and/or the heat pump 3.
  • the heat transfer fluid 6, in particular previously heated can be conveyed and/or is conveyed accordingly by means of the at least one pump 8, 9, 9b through a part of a pipe system 7 and through the water-air heat exchanger 4 in order to heat the environment adjacent to the water-air heat exchanger 4 by means of the water-air heat exchanger 4.
  • the heat transfer fluid 6 is optionally conveyed by means of the at least one pump 8, 9, 9b through another part of the pipe system 7 and through the heat pump 3 in order to heat the heat transfer fluid 6 by means of the heat pump 3.
  • the heat transfer fluid 6 can optionally be conveyed by means of the at least one pump 8, 9, 9b through a further part of the line system 7 and through the primary heat source 2 and/or is conveyed accordingly in order to heat the heat transfer fluid 6 by means of the primary heat source 2.
  • the first 3/2-way valve 21.1 is switched to a first switching position and thus, according to Fig.1a or Fig.2a, a flow of the heat transfer fluid 6 from the branch flow circuit outflow line LSK, down to a region of the heat exchanger inflow line LWT, ZU that is fluidically facing the water-air heat exchanger 4 and/or the heat pump 3 is made possible in order to supply the heat transfer fluid 6 to the water-air heat exchanger 4 and/or the heat pump 3 from the primary heat source inflow line L Q , ZU or from the first side 27.1 of the water-water heat exchanger 27.
  • the first 3/2-way valve 21.1 is switched to a second switching position and thus, according to Fig.1a, Fig.2a, a flow of the heat transfer fluid 6 from a region of the heat exchanger inflow line LWT, ZU is then enabled in terms of flow in front of the first 3/2-way valve 21.1 to the region of the heat exchanger inflow line LWT, ZU that is fluidically facing the water-air heat exchanger 4 and/or the heat pump 3 in order to supply the heat transfer fluid 6 to the water-air heat exchanger 4 and/or the heat pump 3 from the primary heat source outflow line LPQ, and in particular thus to bypass the heating line LHZ and/or the water-water heat exchanger 27 in terms of flow.
  • a flow of the heat transfer fluid 6 from an area of the heat pump discharge line LWP, from fluidically upstream of the first 3/2-way valve 21.1 into the branch flow circuit inflow line LSK, ZU is enabled in order to supply the heat transfer fluid 6 from the heat pump 3 to the heating line LHZ or the first side 27.1 of the water-water heat exchanger 27.
  • the first 3/2-way valve 21.1 is switched to a second Switching position and thus, according to Fig.1 b or Fig.2b, a flow of the heat transfer fluid 6 from the area of the heat pump discharge line L W p, from fluidically upstream of the first 3/2-way valve 21.1 to the primary heat source inflow line LPQ, ZU is enabled in order to supply the heat transfer fluid 6 to the primary heat source 2 and in particular thus to fluidically bypass the heating line LHZ and/or the water-water heat exchanger 27.
  • the bypassing of the heating line LHZ and the water-water heat exchanger 27 with the first 3/2-way valve 21.1 in the second switching position can be ensured according to the situation shown in Fig.2b.
  • the central heating system 1 is therefore operated in particular by forming one of the four described branch flow circuits KAB or the described flow paths and/or one of the two described heating circuits.
  • the first actual domestic water temperature TBI is measured, determined and/or calculated in a - viewed vertically - lower area of the domestic water storage tank 5, in particular by a heat pump control and/or regulating device 14.
  • the heat pump 3 is controlled and/or regulated by means of a heat pump control and/or regulating device 14 depending on the determined first actual domestic water temperature TBI.
  • the central heating control and/or regulating device 12 and the heat pump control and/or regulating device 14 can work independently of one another or control the entire central heating system 1 essentially independently of one another.
  • the heat pump control and/or regulating device 14 is therefore not connected to the central heating control and/or regulating device 12, in particular in terms of control technology.
  • a system which initially only has a primary heat source 2 and the central heating control and/or regulating device 12, for example, can therefore be retrofitted easily and cost-effectively with a heat pump 3 and the heat pump control and/or regulating device 14.
  • the heat pump 3 can be quickly controlled without a large time delay and without a large and complex control effort using the heat pump control and/or regulation device 14. This helps to initially avoid controlling the primary heat source 2, which in turn can save fuel.
  • the first actual domestic water temperature TBI is transmitted to the heat pump control and/or regulating device 14 and/or determined and/or calculated by means of the heat pump control and/or regulating device 14.
  • the second, preferably average, actual domestic water temperature TB2 is measured, determined and/or calculated by means of the second temperature sensor 13.2 in a - viewed vertically - middle or upper area of the domestic water storage tank 5.
  • the second actual domestic water temperature T B 2 is transmitted to the central heating control and/or regulating device 12 and/or determined and/or calculated by means of the central heating control and/or regulating device 12.
  • the primary heat source 2 is controlled and/or regulated by means of the central heating control and/or regulating device 12 depending on the second actual domestic water temperature T B 2.
  • the heat pump 3 is operated and/or activated with the aid of the heat pump control and/or regulating device 14 to heat the heat transfer fluid 6 and the first 3/2-way valve 21.1 is switched to its first switching position with the aid of the heat pump control and/or regulating device 14 when the first actual domestic water temperature TBI measured, determined and/or calculated with the aid of the first temperature sensor 13.1 falls below the first limit temperature T B IG.
  • the heat pump 3 and/or the circulation pump 9 are further controlled and/or regulated by means of the heat pump control and/or regulating device 14, in particular additionally as a function of a first actual heat transfer fluid temperature Twi which forms at the outlet of the heat pump 3.
  • a first target heat transfer fluid temperature Twi, son is set for the heat pump 3, which should be present at the outlet of the heat pump 3 when the heat pump 3 is operating.
  • the heat pump 3 is therefore controlled and/or regulated depending on the first actual heat transfer fluid temperature Twi that forms at the outlet of the heat pump 3 and/or depending on the first target heat transfer fluid temperature Twi. soii set for the heat pump 3.
  • the heat pump 3 is controlled and/or operated such that the corresponding first actual heat transfer fluid temperature Twi then approaches the first target heat transfer fluid temperature Twi, son again, in particular the corresponding desired first actual heat transfer fluid temperature Twi, son is then actually reached or realized as the actual heat transfer fluid temperature Twi at the outlet of the heat pump 3.
  • the primary heat source 2 is operated and/or activated with the aid of the central heating control and/or regulating device 12 for heating the heat transfer fluid 6 and in particular the primary heat source 3/2-way valve 21.G is switched to a first switching position for connecting the heating line LHZ to the primary heat source 2 with the aid of the central heating control and/or regulating device 12 and/or the heat source pump 9b is operated and/or activated with the aid of the central heating control and/or regulating device 12 when the second actual domestic water temperature TB2 measured, determined and/or calculated with the aid of the second temperature sensor 13.2 falls below the second limit temperature T B 2G, so that the second heating circuit is then realized.
  • the primary heat source 2 and/or the heat source pump 9b is further controlled and/or regulated by means of the central heating control and/or regulating device 12 as a function of a second actual heat transfer fluid temperature TW2 that forms within or in the area of the primary heat source 2.
  • the primary heat source 2 is additionally controlled and/or regulated as a function of a second target heat transfer fluid temperature TW2 ,son set for the primary heat source 2. If the temperature of the heat transfer fluid 6 measured within the primary heat source 2, i.e. the actual heat transfer fluid temperature TW2,son, falls below the target heat transfer fluid temperature Tw2,son set for the primary heat source 2, the primary heat source 2 is operated accordingly in order to heat the heat transfer fluid 6 accordingly. This is also implemented accordingly using the central heating control and/or regulating device 12.
  • the domestic water pump 10 is then also operated/controlled and/or activated.
  • the heat pump 3, the circulation pump 9 and in particular the domestic water pump 10 are then operated in particular until the first actual domestic water temperature TBI is again above the first limit temperature TBIG.
  • a first switch-off limit temperature TBIG' is provided, which is preferably 4°C to 6°C above the first limit temperature TBIG and that the heat pump 3, the circulating pump 9 and in particular the domestic water pump 10 are then operated in particular until the first actual domestic water temperature TBI is above the first switch-off limit temperature T B IG'.
  • the method step V W P2 is carried out, namely a different operating mode and/or even the deactivation of the heat pump 3, the circulating pump 9 and in particular the domestic water pump 10.
  • the method then starts again by checking whether the first actual domestic water temperature T B I is below the first limit temperature TBIG.
  • the process steps described here above are carried out in particular when domestic water 11 is taken from the domestic water storage tank 5, e.g. for a shower, and new “colder” domestic water is then fed back into the domestic water.
  • the method step VPR2 namely a different operating mode and/or the deactivation of the primary heat source 2 is carried out.
  • the method then begins again by checking whether the second actual domestic water temperature T B 2 is below the second limit temperature TB2G.
  • the method steps previously described here are carried out in particular when domestic water is taken from the domestic water storage tank, e.g. for a shower, and new “colder” domestic water is then fed back into the domestic water.
  • the process steps described in Fig. 4 take place in particular before the process steps described in Fig. 5.
  • the correspondingly implemented control ensures that the heat pump 3 is controlled or used preferentially before the primary heat source 2 for heating the domestic water 11.
  • the heat pump 3 in particular can and will always be used in preference to the primary heat source 2 to heat the heat transfer fluid 6 or activated and/or controlled accordingly; this should also be pointed out again.
  • the first and second limit temperatures TBIG, T B 2G are selected such that the primary heat source 2 is only operated and/or activated with the aid of the central heating control and/or regulating device 12 for heating the heat transfer fluid 6, in particular the primary heat source 3/2-way valve 21.G is switched to its first switching position, and in particular the heat source pump 9b is only operated and/or activated, when a heat requirement of the domestic hot water storage tank 5 exceeds a quantity of heat that can be provided by the heat pump 3 at maximum output of the heat pump 3. This is particularly the case when the second actual domestic hot water temperature TB2 drops below the second limit temperature T B 2G, in particular although the heat pump 3 is operating at full capacity.
  • the heat pump 3 and/or the circulation pump 9 are controlled and/or regulated by means of the heat pump control and/or regulation device 14, in particular additionally, as a function of a first actual heat transfer fluid temperature Twi that forms at the outlet of the heat pump 3 and/or as a function of a first target heat transfer fluid temperature Twi,son that is predetermined for the outlet of the heat pump 3.
  • the previously mentioned method step V W PI (see also Fig. 4), namely in particular the operation and/or control of the heat pump 3, is thus also carried out as a function of this first actual heat transfer fluid temperature Twi and this first target heat transfer fluid temperature Twi,son, in particular in order to then heat the domestic water 11 accordingly.
  • Different types of controls and/or regulation for the heat pump 3 and/or the circulation pump 9 can be used, which are implemented, for example, with the help of digital programs or with the help of analog circuits.
  • the primary heat source 2 and in particular the heat source pump 9b are controlled and/or regulated by means of the central heating control and/or regulating device 12 as a function of a second actual heat transfer fluid temperature TW2 - which forms within or in the area of the primary heat source 2 - and/or as a function of a second target heat transfer fluid temperature T W 2, son - predetermined for the inner area of the primary heat source 2.
  • the previously mentioned method step V PRi (cf. Fig.
  • the heating pump 8 the circulation pump 9, the heat source pump 9b and/or the domestic water pump 10, which are or will be implemented, for example, with the aid of digital programs or with the aid of analog circuits.
  • the second target heat transfer fluid temperature T W 2, son is below the first target heat transfer fluid temperature Twi, son in such a way that the primary heat source 2 is only operated and/or activated with the aid of the central heating control and/or regulating device 12 for heating the heat transfer fluid 6 when there is a heat requirement of the central heating system 1, in particular a heat requirement of the water-air heat exchanger 4 and/or the domestic hot water storage tank 5, exceeds the amount of heat that can be provided by the heat pump 3 at maximum output of the heat pump 3.
  • the heat transfer fluid 6 will reach the primary heat source 2, in particular when the first heating circuit is implemented, with an actual heat transfer fluid temperature above the second target heat transfer fluid temperature T W 2, son, so that the second actual heat transfer fluid temperature Tw2 then present in the primary heat source 2 is also above the second target heat transfer fluid temperature T W 2, son and the primary heat source 2 therefore does not have to be activated and operated with the combustion of fuels.
  • These processes are particularly relevant when the first heating circuit is implemented, i.e. only the water-air heat exchanger 4 and in particular not the domestic hot water n is heated.
  • the values of the target heat transfer fluid temperatures Twi,son, T W 2,son are also selected in particular so that the processes take place as described above and the primary heat source 2 is activated neither too early nor too late in order to save fuel and to ensure a comfortable room temperature generated by means of the water-air heat exchanger 4 and/or the domestic water 11 taken from the domestic water storage tank 5.
  • the fact that the primary heat source 2 is only operated and/or activated with the aid of the central heating control and/or regulating device 12 for heating the heat transfer fluid 6 when in particular a heat requirement of the domestic hot water storage tank 5 exceeds a quantity of heat that can be provided by the heat pump 3 at maximum output of the heat pump 3 is further ensured by the fact that the first actual domestic hot water temperature TBI - viewed vertically - is measured below the second actual domestic hot water temperature TB2, wherein the domestic hot water 11 can be supplied in particular, as shown below in Fig.3a and Fig.5b, in the area of the measured first actual domestic hot water temperature TBI.
  • the first actual domestic hot water temperature TBI will initially drop over time.
  • the second actual domestic water temperature TB2 will only drop later when the fresh, cold domestic water 11 or its temperature has spread to the second temperature sensor 13.2.
  • the first limit temperature TBIG is reached when cold domestic water 11 is supplied at appropriate selection of the values of the limit temperatures TBIG, T B 2G in relation to one another, the corresponding first actual domestic water temperature TBI must therefore always be undershot before the second limit temperature T B 2G is undershot by the second actual domestic water temperature T B 2, so that the heat pump 3 is always operated preferentially, in particular before the primary heat source 2 is operated and/or activated. If the output of the heat pump 3 is then sufficient to cover the heat requirement of the domestic water storage tank 5, the second actual domestic water temperature T B2 will not fall below the second limit temperature T B2G and the primary heat source 2 does not have to be activated and therefore does not have to be operated with the combustion of fuels.
  • the values of the limit temperatures TBIG, T B2G are selected in particular so that these processes take place as described above and the primary heat source 2 is activated neither too early nor too late in order to save fuel and ensure a comfortable temperature of the domestic water 11 taken from the domestic water storage tank 5.
  • the first limit temperature T B I G is either below the second limit temperature T B2G as shown in Fig.6a or the first limit temperature T B I G is above the second limit temperature T B2G as shown in Fig.6b.
  • the heating pump 8 and/or the circulation pump 9 are controlled and/or regulated by means of the heat pump control and/or regulating device 14, in particular as a function of an outside temperature T a measured by means of an outside temperature sensor 13.a.
  • the heat source pump 9b is controlled and/or regulated by means of the central heating control and/or regulating device 12, in particular as a function of an outside temperature T a measured by means of a further outside temperature sensor 13.b.
  • the heating pump 8 and/or the circulation pump 9 is in particular initially operated and/or activated synchronously with the heat pump 3.
  • the synchronous control is made possible in particular by the fact that both the heating pump 8 and/or the circulation pump 9 and the heat pump 3 are controlled and/or regulated by means of the heat pump control and/or regulation device 14.
  • Fig.6a and Fig.6b show in a very simplified schematic representation a respective dependency of the first target heat transfer fluid temperature Twi. soii, the first limit temperature T B I G , the second target heat transfer fluid temperature T W 2, son or the second limit temperature T B2G on the outside temperature T a , as these are each shown e.g. in tabular form or as a formula in the heat pump control and/or regulating device 14 or in the central heating control. and/or control device 12.
  • the respective graphs are shown as examples and in a highly simplified schematic.
  • the first and second limit temperatures T B IG, T B 2G are shown as horizontal lines parallel to the X-axis of the outside temperature T a according to Fig.6a and Fig.6b.
  • the first and second limit temperatures TBIG, T B2 G are thus present in particular as constant values in the heat pump control and/or control device 14 and in the central heating control and/or control device 12, so that the first and second limit temperatures TBIG, T B2 G are independent of the outside temperature T a for the sake of simplicity.
  • a temperature difference between the first target heat transfer fluid temperature Twi,son and the second target heat transfer fluid temperature T W 2,son is preferably 7°C to 9°C, in particular 8°C with T W 2,son ⁇ Twi,son-
  • the second limit temperature T B2G is smaller than the second target heat transfer fluid temperature T W 2,son- In this way, in particular, effective heating of the domestic water 11 can be achieved by means of the primary heat source 2.
  • central heating control and/or regulating device 12 and/or the heat pump control and/or regulating device 14 can be designed as a computer and/or have corresponding microprocessors for implementing the desired calculations and/or control sequences.
  • Circulation pump b Heat source pump 0 Domestic water pump 1 Domestic water 2 Central heating control and/or regulating device3.1 First temperature sensor 3.2 Second temperature sensor 3. a Outside temperature sensor 3. b Outside temperature sensor 4 Heat pump control and/or regulating device5 Inlet valve 5. r Non-return valve 6 Inlet connection 7a Hot water pipe 7b Cold water pipe 8 T-piece 9 Inverter 0 4/2-way valve 1.1 First 3/2-way valve 1.2 Second 3/2-way valve 1.3 Third 3/2-way valve 1. G Primary heat source 3/2-way valve 2.1 First hydraulic module 2.2 Second hydraulic module 22.3 third hydraulic module

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

L'invention concerne un système de chauffage central (1) comprenant au moins une source de chaleur primaire (2) qui peut être actionnée à l'aide de combustibles, au moins une pompe à chaleur à fonctionnement électrique (3), au moins un échangeur thermique eau-air (4) et au moins un dispositif de stockage d'eau de service (5) pour stocker temporairement de l'eau de service (11). Une conduite d'alimentation d'échangeur thermique (LWT, zu) du système de conduite (7) est en communication fluidique avec la source de chaleur primaire (2) et avec l'échangeur thermique eau-air (4) et une conduite d'évacuation de pompe à chaleur (LWP, ab) du système de conduite (7) est en communication fluidique avec la pompe à chaleur (3) et avec la source de chaleur primaire (2). L'invention concerne également un procédé de fonctionnement et/ou de commande et/ou de régulation d'un tel système de chauffage central (1). En particulier, l'exigence de carburant pour la source d'énergie primaire (2) est réduite au minimum de manière distribuée sur l'année en ce qu'une première soupape à 3/2 voies (21.1) est disposée dans la ligne d'alimentation d'échangeur thermique (LWT, zu) et en ce qu'une première pièce de liaison à 3 voies (26.1) est disposée dans la ligne de décharge de pompe à chaleur (LWP, ab), de telle sorte qu'un circuit d'écoulement de ramification (KAB) du système de ligne (7) est formé au moyen d'une branche de la soupape à 3/2 voies (21.1) et d'une branche de la pièce de liaison à 3 voies (26.1), le fluide de transfert thermique (6) pouvant être pompé à travers le circuit d'écoulement de ramification (KAB) au moyen de ladite au moins une pompe (8, 9, 9b) et l'eau de service (11) pouvant être chauffée à l'aide du fluide de transfert thermique (6) s'écoulant à travers le circuit d'écoulement de ramification (KAB).
PCT/EP2024/068146 2023-06-28 2024-06-27 Système de chauffage central et procédé de fonctionnement et/ou de commande et/ou de régulation d'un système de chauffage central Ceased WO2025003336A1 (fr)

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DE102023117101.1A DE102023117101A1 (de) 2023-06-28 2023-06-28 Zentralheizungssystem und Verfahren zum Betrieb und/oder zur Steuerung und/oder zur Regelung eines Zentralheizungssystems

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Citations (7)

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DE2919751C2 (de) 1979-05-16 1982-12-09 Dietrich H. 6923 Waibstadt Weisse Betriebsschaltung für eine mit einem Heizkessel kombinierte Wärmepumpe
US4385723A (en) * 1981-07-22 1983-05-31 E-Tech, Inc. Connection assembly
US20120018129A1 (en) * 2009-03-26 2012-01-26 Mitsubishi Electric Corporation Temperature adjusting apparatus, fluid supply system, heating system, installation method of temperature adjusting apparatus, and fluid supply method
GB2503781A (en) * 2012-05-30 2014-01-08 Clk Corp Hybrid heat pump boiler system
EP3252382A1 (fr) * 2016-05-31 2017-12-06 Daikin Industries, Limited Appareil de chauffage des locaux et approvisionnement en eau chaude
EP3705786A1 (fr) * 2019-03-08 2020-09-09 Stiebel Eltron GmbH & Co. KG Module d'intégration des générateurs de chaleur dans un système de chauffage
EP3657091B1 (fr) * 2017-07-18 2021-10-27 Mitsubishi Electric Corporation Dispositif d'alimentation en eau chaude

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2659806C2 (de) * 1976-12-16 1983-12-08 Buderus Ag, 6330 Wetzlar Warmwasserzentralheizungsanlage mit zwei Wärmeerzeugern
DE102019216857A1 (de) * 2019-10-31 2021-05-06 Robert Bosch Gmbh Verfahren zur Steuerung einer Wärmevorrichtung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2919751C2 (de) 1979-05-16 1982-12-09 Dietrich H. 6923 Waibstadt Weisse Betriebsschaltung für eine mit einem Heizkessel kombinierte Wärmepumpe
US4385723A (en) * 1981-07-22 1983-05-31 E-Tech, Inc. Connection assembly
US20120018129A1 (en) * 2009-03-26 2012-01-26 Mitsubishi Electric Corporation Temperature adjusting apparatus, fluid supply system, heating system, installation method of temperature adjusting apparatus, and fluid supply method
GB2503781A (en) * 2012-05-30 2014-01-08 Clk Corp Hybrid heat pump boiler system
EP3252382A1 (fr) * 2016-05-31 2017-12-06 Daikin Industries, Limited Appareil de chauffage des locaux et approvisionnement en eau chaude
EP3657091B1 (fr) * 2017-07-18 2021-10-27 Mitsubishi Electric Corporation Dispositif d'alimentation en eau chaude
EP3705786A1 (fr) * 2019-03-08 2020-09-09 Stiebel Eltron GmbH & Co. KG Module d'intégration des générateurs de chaleur dans un système de chauffage

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