WO2024188866A1

WO2024188866A1 - Hybrid heat pump frame kit

Info

Publication number: WO2024188866A1
Application number: PCT/EP2024/056200
Authority: WO
Inventors: Francesco ROBERTI VITTORY; Alberto FIORESE; Tiziano Marzaro
Original assignee: Bdr Thermea Group B.V.
Priority date: 2023-03-10
Filing date: 2024-03-08
Publication date: 2024-09-19
Also published as: WO2024188869A1; WO2024188867A1; WO2024188868A1

Abstract

The invention relates to a heat pump frame kit (1) for a hybrid energy transformation device, the heat pump frame kit (1) comprising a frame (2) for connecting the heat pump frame kit (1) to a wall and to a boiler unit (500) and a heat exchanger (9) for heat exchange between a refrigerant of a heat pump unit (200) and a load circuit (300) and a distributor (10) arranged within the volume delimited by the frame (2), in particular connected to the frame (2), and fluidically connected to the heat exchanger (9), wherein the distributor (10) comprises at least one load connector set (17) for connecting a cavity of the distributor (10) with at least one load circuit of an energy system (400) wherein the at least one load connector set (17) for connecting a cavity of the distributor (10) with at least one load circuit (300) of an energy system (400) comprises an outlet connector configured to convey water from the distributor (10) to the at least one load circuit (300) and a return connector configured to convey water from the at least one load circuit (300), via the heat exchanger (9), to the distributor (10), in particular to the cavity of the distributor (10).

Description

HYBRID HEAT PUMP FRAME KIT

The invention relates to a heat pump frame kit. The invention further relates to a boiler frame kit, a hybrid energy transformation device and an energy system. The invention further relates to the use of such a heat pump frame kit and/or boiler frame kit. The invention further relates to a method of installation a hybrid energy transformation device.

Heat pumps become more and more popular for heating and/or cooling of houses, more and more also in addition to a boiler. Using a heat pump alongside a boiler is referred to as a ‘hybrid heat pump’. In other words, this term refers to an energy transfer system that uses a heat pump alongside a further heat source. Typically, it describes fitting a heat pump alongside a natural gas, LPG or oil boiler. Systems comprising a common boiler and a common heat pump require additional installation space. This installation space is not always available, in particular in cases where an already existing boiler needs to be replaced.

In order to reduce the needed installation space for such hybrid heat pump system, more recent hybrid heat pump systems comprise a heat pump unit, an out-door unit, and a boiler unit in one compact system, sometimes referred to as a complete hybrid heat pump product. Such a complete hybrid heat pump product is designed for a cooperation of the individual units in the system, wherein the individual units are easy to transport and install. It is important that the installed system requires less installation space compared to a non-compact hybrid heat pump system comprising at least an individual conventional boiler and a conventional heat pump. These compact systems allow that the components of the units can be accessed from the front of the system. These known complete hybrid heat pump products are configured to determine cheap and energyefficient heating modes depending on the internal heating demand, energy prices and out-door temperatures. The complete hybrid heat pump product according to the prior art, comprising a heat pump unit with a heat exchanger, an out-door unit, and a boiler unit in one compact system comprises a load line of the heat pump unit and a load line of the boiler unit, which are directly fluidically connected via a T-piece to the load connector to the load circuit for a central heating. This has the disadvantage of recirculation. In other words, for example hot water enters the heat pump unit or in the boiler unit instead of to the load circuit. In addition, the parts of the known complete hybrid heat pump products are only accessible during maintenance via the front of the complete hybrid heat pump product. In a limited and poorly accessible installation space, this means that an installer, who needs to access the heat pump has to work at least partially behind the boiler parts, which leads to longer maintenance service times and reduced comfort for the installer.

EP2484990A2 is directed to providing a boiler assembly which comprises a removable boiler, alleviating the problem of in-situ servicing and maintenance which requires a large selection of spare parts being available and if the repair is a complex one, the household being without water and/or heating for a considerable period of time. In order to achieve this, EP2484990A2 discloses a boiler unit of a boiler assembly which can be removed from a manifold unit for servicing or repairs, a removable The boiler unit is detachably connected to a manifold unit, the arrangement being such that the manifold unit provides the boiler unit, in use, with a connection interface to a pipework system, the manifold unit comprising a rear section comprising at least one guide rail so positioned on the manifold unit that, during assembly, the boiler unit is moved along the guide rail which supports and guides the boiler unit on to the manifold unit, and such that, when assembled, the guide rail supports the weight of the boiler unit, characterised in that a rear portion of the boiler unit comprises a rearwardly directed exhaust gas flue duct, and the rear section of the manifold unit is provided with a flue box, a front portion of the flue box being provided with a forwardly directed exhaust gas flue inlet and a top portion of the flue box is provided with an upwardly directed exhaust gas flue outlet, the assembly being such that as the boiler unit is moved along the guide rail, the boiler unit exhaust gas flue duct sealingly connects with the manifold unit exhaust gas flue inlet, the exhaust gas flue outlet being arranged to be connected to a flue connection in the building. The boiler assembly of, EP2484990A2 further comprises a mounting bracket further comprises a renewable energy condenser connected to the flue box and also connected to a condenser interface. The condenser interface comprises connections that enable the interface to be connected to pipework from a renewable energy powered water preheating device such as a water heating solar panel or a ground source heat pump.

EP4145058A1 is directed to providing a climate control apparatus that is highly reliable, relatively easy to provide and at competitive costs and which is extremely compact so that it can be installed in an extremely practical manner. In order to achieve this goal, EP4145058A1 discloses a climate control apparatus, comprising a boiler assembly and a heat pump, said boiler assembly comprising a boiler structure and an accommodation compartment for an accumulation tank and for a hydraulic separator, said climate control apparatus comprising means for the hydraulic connection of said accumulation tank to said boiler structure and to said heat pump, wherein said accommodation compartment is provided with means for coupling to a wall and is configured to support said boiler structure. EP4145058A1 discloses further in figure 6 that the user devices’ feed flow is connected to the boiler structure and the return flow is connected the accommodation compartment. Thus, the central heating circuit of EP4145058A1 is directed through the boiler and thus disadvantageously requires that the boiler always must be turned on to process the fluid for the central heating circuit. The heat pump is fluidically connected to the accommodation compartment and in particular to the accumulation tank 13. Thus, the heating fluid of the heat pump is processed through the accumulation tank of EP4145058A1 which is fluidically connected to the boiler of EP4145058A1. Additionally, the heat pump has a higher volume flow compared to the boiler structure, which requires a balancing of volume flows to ensure that the volume flow of the heat pump is not choked and leads to unwanted stalling of the heat pump. This is mitigated in EP4145058A1 by way of the accumulation tank leading to temperature loss of the heated fluid. In other words, the accumulation tank is a buffer tank and the heated fluid of the heat pump will be conveyed to the user device through the accumulation tank, and in particular through the boiler structure of EP4145058A1 this leads to a loss of temperature of the heated fluid from the heat pump. This has the further disadvantage that the boiler structure leads to additional loss of temperature of the heated fluid from the heat pump until the fluid reaches the user devices, compared to a direct connection of the heat pump to the user devices. This temperature loss can be compared to the temperature loss resulting from conveying the fluid through a second user device. The heat pump flow rate results from the low deltaT between the inlet and outlet of the heat pump. In order to provide sufficient power, the heat pump thus has a comparatively high flow rate compared to the boiler to deliver the same defined kW output as a boiler which operates at a higher delta T. Thus, the boiler requires a lower flow rate to deliver the same defined kW output. Thus, a heat pump and a boiler in series as for example disclosed in EP4145058A1 have the disadvantage that this hybrid system in series has to be defined based on a compromise for the overall flow rate. The flow rate is either optimized for the heat pump and then the flow rate is too high for the boiler or the flow rate is optimized for the boiler unit and then the flow rate is too low for the heat pump.

WO2019155230A1 is directed to providing improvements to boiler assemblies comprising a removable boiler unit such as the boiler unit disclosed in EP2484990A2. WO2019155230A1 discloses to that end a boiler assembly comprising a removable boiler unit detachably connectable to a manifold unit, the arrangement being such that the manifold unit provides the boiler unit, in use, with a connection interface to a pipework system, wherein boiler unit comprises a rear boiler unit section and a base boiler unit section, and there is provided a support structure which extends from said base section to said rear section. The connection interface comprises a number of fluid ports provided on each of the boiler unit and the manifold unit.

DE29910961 U1 is directed to providing a condensing boiler with a water switch which occupies a reduced area of a building wall. In order to achieve this goal, DE29910961 U1 discloses a condensing boiler with a water switch, in which a boiler housing is provided on a rear wall with suspension hooks, which is assigned a hook receptacle, in which a switch wall of a switch housing is provided with attachment lugs for attachment to a building wall and in which the switch housing accommodates switch pipes, from which connecting pipes to a boiler housing and connection pieces for the radiators are directed and wherein the switch housing is arranged on the rear wall of the boiler housing, extending parallel thereto and that the switch housing is provided with the hook mount on the front and supports the boiler housing.

GB2409894B is directed to providing a boiler assembly comprising a removable boiler as disclosed in EP2484990A2 and in WO2019155230A1 and discloses a boiler assembly comprising a removable boiler unit detachably connected to a manifold unit, the arrangement being such that the manifold unit provides the boiler unit with a connection interface to a pipework system.

US11300301 B2 is directed to providing a manifold which is suitable for coupling at least one heat exchange circuit to at least two heat sources for providing liquid heat transfer medium from the at least two heat sources to the at least one heat exchange circuit. The manifold for a heat exchange system being in particular suitable for coupling one or more heat exchange circuits to two or more conventional boilers where at least one of the boilers requires return heat exchange water to be at a temperature different to the temperature of the return heat exchange water required by one or more of the other boilers or heat sources. In order to achieve this goal, LIS11300301 B2 discloses a manifold having a hollow interior region divided to form a flow chamber configured to receive liquid heat transfer medium from at least two heat sources, and to provide the heat transfer medium to at least one heat exchange circuit, a return chamber configured to receive heat transfer medium returned from the heat exchange circuit, and to provide the returned heat transfer medium to one of the at least two heat sources, and a bypass chamber communicating with the flow chamber and configured to provide heat transfer medium from the bypass chamber to another one of the at least two heat sources. US11300301 B2 further discloses that adjacent chambers of the flow, return and bypass chambers are configured to communicate with each other to substantially equalize the pressure in the heat transfer medium in the hollow interior region. In addition, the flow chamber, the return chamber and bypass chamber are configured so that mixing of heat transfer medium in the return chamber with the heat transfer medium in the flow and the bypass chamber is minimized. LIS11300301 B2 discloses as a particularly important advantage of the invention that the manifold is suitable for returning return liquid heat transfer medium to different heat sources at different return heat transfer medium temperatures in order to enable the heat sources to operate at optimum efficiency. Additionally, the manifold creates a neutral point within the hollow interior region thereof for the heat exchange system, whereby the pressures of the heat transfer medium in the heat exchange system are equalized at the neutral point. This equalizing of the pressures of the heat transfer medium in the heat exchange system at the neutral point in the manifold is achieved by virtue of the fact that the pressures of the heat transfer medium in the flow chamber, the return chamber and the bypass chamber of the manifold are equalized at the neutral point therein through the communicating apertures in the partition walls of the manifold. LIS11300301 B2 discloses in particular in fig. 1 a system with a boiler and a heat pump. The boiler and the heat pump are fluidically connected to pipes that are fluidically connected to a connector of the manifold. Additionally, the heat pump is fluidically connected to a connector of the manifold. This leads to that the distributor does not separate the boiler fluid flow from the heat pump fluid flow so that there is a mixing of the two fluid flows. However, according to the invention such a mixing shall be prevented. Additionally, due to the structure of the system and the distributor it is not possible that the boiler unit is shut off when the heat pump is sufficient for heating purposes. In LIS11300301 B2 the heat pump fluid will mix with the boiler fluid being in the pipes resulting in a temperature and thus energy loss. US11300301 B2 further discloses in fig. 1 a flow heat exchange water from the conventional boiler, the heat pump and the solid fuel boiler which is delivered into the flow chamber of the manifold through the first and second inlet ports. Flow heat exchange water is delivered from the flow chamber through the flow ports to the first and second heat exchange circuits, and through the flow port to the lower heat exchange coil in the indirect domestic hot water cylinder.

EP3220063B1 relates to a plant configured to heat sanitary water intended to supply the users of a sanitary plant and to heat or cool water intended for an air conditioning plant. Hybrid plants of a known type comprise at least two heat sources: a heat pump and a gas boiler. However, the connection between the heat sources, the sanitary water plant and the air conditioning plant is carried out by means of a very complex connecting hydraulic circuit. Moreover, the connecting hydraulic circuit currently used does not allow an optimal exploitation of the heat sources used. EP3220063B1 is therefore directed to providing an interface module for the connection of the heat sources with the sanitary water plant and with the air conditioning plant, which simplifies the connection between the heat sources, the sanitary water plant and the air conditioning plant and at the same time allows an optimal exploitation of the heat sources used. In order to achieve this goal, EP3220063B1 discloses a hybrid thermal plant comprising a boiler provided with a burner, a boiler supply conduit supplied with technical water heated by the burner, and a boiler return conduit; a heat pump provided with a heat pump supply conduit supplied with technical water heated or cooled, directly or indirectly, by the heat pump, and a heat pump return conduit; an interface module comprising a first inlet coupled to the heat pump supply conduit configured to receive technical water heated by a heat pump; a second inlet coupled to the air-conditioning return conduit configured to receive return technical water from an air-conditioning plant; a first outlet coupled to the boiler return conduit configured to supply return technical water to the boiler; a second outlet coupled to the heat pump return conduit configured to supply return technical water to the heat pump; characterized in that the interface module being configured so as to selectively connect the first inlet with the first outlet and/or the second inlet with the second outlet or the second inlet with the first outlet on the basis of the operative conditions of the boiler and of the heat pump; the interface module comprising a tank provided with a separating septum adapted to divide the tank into a first chamber in communication with the first inlet and the first outlet, and a second chamber in communication with the second inlet and the second outlet.

EP2420747B1 is directed to a heat pump including a boiler. The heat pump may include the boiler which may be selectively operated based on a temperature of external air or an electric power rate per unit heat quantity. When the heat pump is used for heating a room, the heat pump may replace fossil fuel. However, if a temperature of external air drops, heating efficiency may deteriorate drastically, or a sufficient heating function might not be provided in a case that the heat pump is used as a heating source. As a result, the heat pump often alone cannot provide sufficient heating or quick-hot-water-supply. Also, the heat pump and a boiler may be used together for heating. In this case, when a power rate or gas rate per unit heat quantity is changed, methods for minimizing a total rate of energy consumed for heating may be required. EP2420747B1 discloses a heat pump, comprising an outdoor device configured to compress a refrigerant; a hydrodevice configured to heat-exchange the compressed refrigerant with water; a boiler configured to selectively heat water circulating through the hydro-device or water supplied from a commercial water supply system; a radiation heater configured to perform heating using the water heated by the hydro-device or the boiler; and a controller configured to control the outdoor device, the hydro-device, and the boiler, wherein the boiler comprises: a combustion heater configured to combust fossil fuels to heat water to be supplied to the radiation heater using combustion heat; and a heat exchange heater configured to heat water supplied from the commercial water supply system using the water heated by the combustion heater, and wherein the combustion heater is configured to heat the water supplied via a floor supply pipe, characterized in that the floor supply pipe includes a first boiler valve and a second boiler valve and is connected to a boiler supply pipe and a boiler collection pipe which pass through the boiler, the first and second boiler valves are configured to supply the water supplied from the hydro-device to the radiation heater directly or via the boiler, and the supply of the water to the radiation heater via the boiler along with operating the boiler and stopping the operation of the hydro-device is performed when a temperature of external air is equal to or less than a preset temperature.

EP2420745B1 is directed to a heat pump including a boiler is disclosed. The heat pump may include a quick-hot-water-supply tank and the boiler, which may be operated selectively based on a temperature of external air or an electric power rate per unit heat quantity. When the heat pump is used for heating a room or for supplying hot water quickly, the heat pump may replace fossil fuel. However, if the temperature of external air decreases, heating efficiency might deteriorate drastically, or sufficient heating or quick-hot-water-supply might not be provided in a case in which the heat pump is used as a heating source for heating or quick-hot-water-supply. As a result, the heat pump often alone cannot provide sufficient heating or quick-hot-water-supply. Also, the heat pump and a boiler may be used together for heating or quick-hot-water-supply. In this case, when a power rate or gas rate per unit heat quantity is changed, methods for minimizing a total rate of energy consumed for the heating or the quick-hot-water-supply may be required. EP2420745B1 discloses a heat pump, comprising an outdoor device comprising a compressor; a hydro-device comprising at least one heat exchanger that heat-exchanges refrigerant supplied by the outdoor device with water; a boiler configured to selectively heat water circulating through the hydro-device or water supplied from a commercial water supply system; a quick-hot-water-supply tank configured to heat and store water supplied by the commercial water supply system using the water heat- exchanged with the refrigerant in the hydro-device or to store, after heating, the water supplied by the commercial water supply system; a radiation heater configured to perform heating using water heated by at least one of the hydro-device or the boiler; and a controller configured to control the outdoor device, the hydro-device, and the boiler, wherein the refrigerant supplied to the hydro-device by the outdoor device is heat- exchanged with water circulating through the radiation heater and the quick-hot-water- supply tank, characterized in that the hydro-device comprises: a first heat exchanger that heat-exchanges the refrigerant supplied by the outdoor device with water circulating through the quick-hot-water-supply tank; and a second heat exchanger that heatexchanges the refrigerant supplied by the outdoor device with water circulating through the radiation heater.

EP1946020B1 is directed to refrigerant systems, and more particularly to heat pump refrigerant systems equipped with supplemental heating. Some heat pump systems are equipped with supplemental gas heating means. During operation of these systems, when the ambient temperature falls below a certain level (at specified indoor conditions), it becomes more efficient to switch from utilizing electric energy and running a heat pump in a heating mode to heating an indoor environment by engaging supplemental gas (natural gas, propane, butane, etc.) heat, supplemental heat from other commodities such as oil, heated water, and/or heated air. Currently this is accomplished by setting a thermostat within a conditioned (heated in this case) environment that switches between the heat pump mode of operation, and gas heating at a predetermined ambient temperature, normally at about 20°F, for a conventional indoor temperature range about 70°F+/-5°F. A major drawback of having the predetermined setting of switching between the heat pump mode of operation and the supplemental heating is that this setting cannot be changed in real time, as it corresponds to a certain predetermined value that is established either at the factory or by the user, i.e., installer. The value of this predetermined setting is based on rule-of-thumb knowledge regarding heat pump system operation, thermal behavior of the heated structure, as well as electricity and gas (or other commodity) prices. EP1946020B1 is therefore directed to providing a system and method that allows for adjustment of the switching set point between supplemental gas heating and electric operation of the heat pump system in real time, in response to changes in gas and electricity prices, to maximize savings to the consumer and to possibly prevent electric grid overloading. In order to achieve this goal, EP1946020B1 discloses a method for control of a heating system having a heat pump and supplemental heating, via a computer system. The method includes at least periodically receiving data related to current prices of at least one of electricity and a source of the supplemental heating, and automatically changing a switching set point in response to price changes in at least one of the electricity prices and prices of the source of the supplemental heating.

FR2935781 B1 is directed to a method for regulating a fluid circulation heating installation comprising a heating circuit, a heat pump and at least one additional heating means for heating said fluid. FR2935781 B1 discloses that methods for regulating such installations are imprecise. In particular, regulation processes lead, in certain cases, to unnecessary triggering of the boiler backup when the power of the heat pump is sufficient to reach the desired heating temperature, in conditions of heating determined. Thus, in these cases, the operation of the boiler could be avoided, and the energy consumption reduced. In other cases, the heat pump is used alone to reach the necessary heating temperature while its power is too low to obtain the desired heating temperature under determined heating conditions. Consequently, in these cases, the installation takes too long to reach the desired temperature, which is detrimental to user comfort. FR2935781 B1 is thus directed to providing a method of regulation which allows for the optimization of energy consumption and satisfactory comfort of use. In order to achieve this goal, FR2935781 B1 discloses a method for regulating a heating installation with circulation of heat transfer fluid, comprising at least one heating circuit, a heat pump and additional heating means for heating said fluid, said installation having at least a first mode of operation in which only the heat pump ensures the heating of the heat transfer fluid and a second mixed mode of operation in which the heat pump and the additional heating means jointly heat the heat transfer fluid; said method comprising the following steps: determining an instantaneous heating power Pi to be supplied so that the heat transfer fluid reaches a set temperature Tc; comparison of said instantaneous heating power Pi to be supplied, with at least one power threshold; and determining the appropriate mode of operation of the installation, depending on the result of the comparison of the previous step.

EP3705786A1 relates to a module for integrating two heat generators into a heating system. EP3705786A1 is directed to integrating heat pumps into the existing heating system in the event of a renovation of the heating system or heating system, on the one hand to avoid the need for to avoid electrical reheating and also to be able to keep the costs of the renovation low. In order to integrate a heat pump into an existing heating system, modifications must be made, in particular in order to be able to address and manage all components from a central controller. Good knowledge of the system is required here, which is usually not always apparent at first glance. An intensive study of the existing components leads to a personnel effort that is associated with the retrofitting. It is also possible that the previous system parts of the heating system are not designed and arranged for hybrid operation with a heat pump. Integrating new actuators and sensors can therefore be difficult. EP3705786A1 is therefore directed to providing a module that enables integration with as little effort as possible, a module for integrating two heat generators into a heating system. The heating system can be an existing heating system that is being retrofitted or a newly constructed heating system. The module has connections for connecting a first heat generator. The first heat generator is, for example, a heat pump that is to be retrofitted or installed. The connections for connecting the first heat generator include a connection for a flow, i.e. through which a fluid, usually water, flows into the module and a return, i.e. a connection from which the fluid flows back to the first heat generator. This creates a circuit through the first heat generator, which is connected via the connections in the module. The module also has connections for connecting a second heat generator. The connections for connecting the second heat generator are functionally identical to those of the first heat generator, ie they preferably have a flow connection and a return connection. The second heat generator is preferably a thermal bath and/or a boiler that can be operated, for example, using conventional fossil fuels such as gas or the like. In some preferred configurations of the module according to the invention, the second heat generator is already integrated in the heating system, while the first heat generator is retrofitted and can be connected to the heating system with little effort using the module according to the invention. The module also has connections for connecting a heat accumulator, in particular a hot water accumulator. In the heat accumulator is preferably service water, ie drinking water, which is stored at a desired temperature. The water stored in the heat accumulator as a heat storage medium is decoupled from the medium flowing through the connections in order to take hygiene regulations into account. The module also has connections for connecting a heat consumer, in particular a heating circuit. These connections, like those of the heat accumulator, also include a flow connection and a return connection, to which a flow or return of the heat accumulator or heat consumer can be connected. The module further includes a hydraulic arrangement provided between the various ports. The hydraulic arrangement also has a mixing valve. The module includes a controller that is set up to implement regulation of the heating system based on efficiencies of the first heat generator and the second heat generator.

EP0092032A2 relates to a device for transferring heat stored in a fluid from a supply line to a consumer, with supply flow, return, consumer flow, return, bypass and/or safety line. EP0092032A2 is directed to creating a compact and lightweight device of the generic type that is easy to manufacture. In order to achieve this goal, EP0092032A2 discloses a device for transferring heat stored in a fluid from a supply line to a customer, with supply flow, return, customer flow, return, bypass and/or safety line, characterized in that arranged in the form of a matrix, at least partially intersecting ingot longitudinal and transverse lines are provided; that the lines at least some of their crossing points communicate with each other without interposed branch pipe parts; that in the lines barrier walls are provided which have a longitudinal section extending parallel to the line direction; that in the longitudinal section of a barrier wall a closable passage is formed and that a closable opening is aligned with the passage, the opening being at least has the same large diameter as the passage.

EP3184930A1 relates to an arrangement consisting of a refrigeration installation and a building (B), the installation comprising at least one heat exchanger included in a refrigerating machine inside the building and through which a refrigerant passes. The arrangement comprises a sealed box containing said refrigerating machine and comprising a sealed conduit opening outside the building.

FR3064723A1 is directed to make the installation of wall-mounted gas boilers faster and more efficient, by simplifying the installation, in particular in the case of irregular walls, by reducing to a minimum the connections to be made on the construction site and to allow them to be protected against theft and discloses a wall-mounted gas boiler backsplash comprising a frame to be applied to a wall and to receive the boiler. The frame has a hoop pivotally mounted on the uprights of the frame. The arch has two arms connected by a crosspiece carrying the fittings of the boiler. The arch is pivotable between the uprights between a folded position in the frame, and a deployed position in front of the frame to receive the boiler.

GB2378747A is directed to domestic boiler repairs and relates to a boiler assembly comprising a removable boiler unit and a method for servicing and maintaining a boiler unit.

JP1998325612A is directed to provide a combustion device in which a maintenance characteristic is improved with little restriction for an installing position. In order to achieve this goal JP1998325612A discloses a combustion device is provided with a lengthwise long box shaped housing with a sidewise long rectangular shape in plan view in which a burner and a heat exchanger are housed. Two perpendicular surfaces of the peripheral side plates of the housing are formed as attachable front panel and side panel. A first operating window hole is provided on the front panel and a second operating window hole is provided on the side panel. A display and operating part faces either the first operating window hole of the front panel or the second operating window hole of the side panel and a cover plate faces the other. The display and operating part and the cover plate are movably assembled in the housing to be exchangeable with each other so that they can face both the first operating window hole and the second operating window hole.

The object of the invention is therefore, to constructively facilitate the easy and safe installation and connection of hybrid heat pump systems and of their components wherein recirculation in the hybrid energy transfer system is reduced or avoided in a constructively simple manner. It is also an object of the invention to improve the flow rate decoupling of a hybrid heat pump system compared to a conventional hybrid heat pump system, such as the example shown in fig. 6 of EP4145058A1 where the heat pump and the boiler are fluidically connected in series. The hybrid heat pump system should additionally have a good lifespan and be sustainable in how it can be controlled effectively and be compact, easy to transport and install.

The object is solved by a heat pump frame kit for a hybrid energy transformation device, the heat pump frame kit comprising a frame for connecting the heat pump frame kit to a wall and to a boiler unit, in particular a boiler frame kit as described below, and a heat exchanger for heat exchange between a refrigerant of a heat pump unit and a load circuit, wherein the heat exchanger is arranged within a volume delimited by the frame and a distributor arranged within a volume delimited by the frame, in particular connected to the frame, and fluidically connected to the heat exchanger, wherein the distributor comprises at least one load connector set for connecting a cavity of the distributor with at least one load circuit of an energy system wherein the at least one load connector set for connecting a cavity of the distributor with at least one load circuit of an energy system comprises an outlet connector configured to convey water from the distributor to the at least one load circuit and a return connector configured to convey water from the at least one load circuit, via the heat exchanger, to the distributor, in particular to the cavity of the distributor.

The term heat pump frame kit according to the invention means that the heat pump frame kit is a frame kit for fluidically connecting a heat pump to at least one load circuit and/or a boiler unit. The heat pump kit constructively allows to install and connect a heat pump unit and a boiler unit to form a hybrid energy transfer system in a standardized, easy manner, reducing the chance of errors. The installation further requires few changes to the existing installation site, in particular, extensive interventions in the piping system of the existing, e.g. boiler installation can be reduced to a minimum or even avoided. Thus, the heat pump frame kit according to the invention allows for a constructively easy, fast, error-reduced and safe installation and connection to provide a hybrid energy transfer system and of its components. The heat pump frame kit according to the invention further allows for the reduction or even avoidance of recirculation in the hybrid energy transfer system in a constructively simple manner.

In addition, the hybrid energy transfer system is compact. Compact within the meaning of this application means that the installation space needed for a boiler unit of such a system is only extended in one dimension of the required installation space for a conventional boiler unit, wherein the dimension is height, width, or depth. Preferably said dimension is depth of the boiler unit installation space. This means that the heat pump frame kit preferably constructively fits behind the boiler unit of the hybrid energy transfer system and only extends the system in terms of adding to the depth of the boiler unit.

Another advantage of the heat pump coupling frame kit to transform an existing heat pump unit and/or boiler unit in an existing installation to become a compact hybrid heat pump system which allows for the boiler to be used only as a secondary heat source when needed, is constructively easy and safe and does not require additional training and can be connected by an installer trained for boiler installation.

The heat pump frame kit can be fluidical ly connected to a heat pump unit. The heat pump unit can be a split heat pump. Further the heat pump can be an air source heat pump or ground source heat pump.

The heat pump frame kit is to be connected to the wall and the boiler unit is to be connected to the heat pump frame kit such that the heat pump frame kit is in between the wall and the boiler unit.

The heat pump frame kit allows to install and connect a heat pump unit and a boiler unit to form a hybrid energy transfer system in a standardized, easy manner, reducing the chance of errors. The boiler unit uses fuel, which may be oil, natural gas, propane, hydrogen or a mixture of hydrogen and another fuel, such as natural gas or propane. The boiler unit comprises a burner, a burner chamber and a heat exchanger and can comprise valves, at least one control unit, a control panel and an expansion valve.

The distributor is a hydronic or hydraulic distributor by means of which a liquid, in particular water, as an energy carrier is distributed between the heat pump unit and/or boiler on one side and at least one load circuit on the other side. The terms hydraulic and hydronic are used as synonymously. The term is used in this application to mean a liquid, in particular a liquid aqueous system, in particular water, as a heat-transfer medium in heating and/or cooling system, as also the term hydraulic is used in the field of heating and cooling for such a heat-transfer medium system, the terms are used synonymously in this application. The distributor is fluidly connected with a heat pump unit and a boiler unit to receive water from the heat pump unit and the boiler unit that is to be distributed to the one or more load circuits of the energy system. The distributor according to the invention allows for the boiler to run simultaneously with the heat pump in cases where the heat pump alone cannot provide enough power to fulfil the required heat demand. The distributor according to the invention allows for the heat pump unit and for the boiler unit to run on their respective required flow rate without having to compromise. The volume flow rates are coupled in the distributor and the produced heat is integrated from both appliances for distribution to the load circuits, in particular the load circuit for central heating/cooling.

A 4-way distributor is especially preferred as a distributor within the meaning of the application due to the size, costs and ease of installation of the 4-way distributor; also a 6-way distributor is suitable as a distributor within the meaning of the application.

The heat exchanger may be a refrigerant-destination medium heat exchanger. The destination medium may be water to be cycled through a load circuit. The refrigerant is a medium used by the heat pump unit to transfer heat. The heat exchanger is fluidly connected to and part of a refrigerant circulation system to receive warmed (or cooled) refrigerant for warming (or cooling) water. The received refrigerant is used in the heat exchanger to warm (or cool) water. The heat exchanger is also fluidly connected to and part of the refrigeration circulation system to discharge refrigerant from the heat exchanger. The discharged refrigerant is used in the remainder of the refrigerant circulation system to be reheated (or re-cooled). The refrigerant circulation system is part of the heat pump unit. Hence, the at least one load connector set of the distributor connects a cavity of the distributor to at least one load circuit of an energy system via a first connector of the load connector set directly and via a second connector of the load connector set indirectly via the heat exchanger.

The heat exchanger comprises at least one heat pump connector set for a heat pump unit. The distributor comprises at least one boiler connector set for a boiler unit.

The term connector set is used to refer to a set of connectors, comprising at least one connector functioning as a fluid outlet from the distributor and one corresponding connector functioning as a fluid inlet to the distributor. Connector sets may be provided as pairs. More generally, connectors sets may also comprise one or more connector functioning as a fluid outlet from the distributor and one or more corresponding connectors functioning as a fluid inlet to the distributor.

The load connector set, in particular for connecting the distributor with a central heating circuit, may be arranged at a standard distance from the wall (or the parts of the heat pump frame kit to be positioned against the wall, i.e. the back panel(s)) and at a standard mutual distance relative to each other, i.e. the first connector of a set and the second connector of a set are at a standard mutual distance relative to each other. The distances are all measured from the centre point of the connectors. The distance from the wall may be in the range of 70 - 80 mm, for instance 60 mm. The mutual distance may be in the range of 60 - 70 mm, for instance 75 mm.

According to an embodiment the heat pump frame kit comprises a set of coupling elements to fluidically connect a first boiler connector set to a first load circuit.

The coupling elements may be hollow members which each are on one end configured to be connected to a first boiler connector set (via suitable piping) and which each are on the other end configured to be connected to a first load circuit. The first load circuit may be a domestic heat water circuit, comprising a heat exchanger in which the warm water received from the boiler unit and passed on to the first load circuit is allowed to exchange heat with the actual domestic water. The coupling element establish a direct connection between the boiler unit and the first load circuit. The heat pump frame kit may comprise a second boiler connector set, configured to fluidically connect the boiler unit to the distributor, in particular to the cavity of the distributor. Via the second boiler connector set the distributor is fluidly connected to the boiler unit to receive warmed water from the boiler unit and to discharge water from the distributor to the boiler unit to be heated by the boiler unit.

According to an embodiment the heat pump frame kit comprises a jig, the jig holds

• the at least one load connector set and/or

• the coupling elements and/or

• a fuel connection.

According to an embodiment the jig is connected to the heat pump frame kit and is attached to the wall at a pre-defined distance to the heat pump frame kit. It is conceivable that the jug is alternatively or additionally attached to the heat pump frame kit, in particular to the frame or to back panels of the heat pump frame kit.

The jig may be a steel plate having receiving holes for receiving connectors of a connector set. The holes may be provided at standardized mutual distances to be aligned with connector sets of load circuits.

According to an embodiment the heat pump frame kit comprises two side panels, in particular a right-hand side panel and a left-hand side panel.

The side panels are provided at opposite sides of the heat pump frame kit to shield the interior of the heat pump frame kit comprising the distributor and other components, like the deaerator, the pump, the supply pipe, diverting valve. In particular, the side panels can be opposite to each other regarding a plane comprising the central body axis of the heat pump frame kit. The side panels refer to the sides of the heat pump frame kit that are covered by the wall or the boiler unit when the heat pump coupling panel is connected to the wall and the boiler unit.

According to an embodiment the side panels can comprise at least one of steel, aluminium, a polymeric, in particular a thermoplastic material, and a composite material or can be made of steel, aluminium, a polymeric, in particular a thermoplastic material, and a composite material. Steel provides the side panels with strength. The aluminium, the polymeric, in particular the thermoplastic material, and the composite material may be used to reduce the noise generated by the heat pump frame kit and the boiler unit and reduce the weight of the respective unit.

According to an embodiment the side panels are configured to be attached to the frame in an operational state of the heat pump frame kit and are configured to be opened or removed from the heat pump frame kit in a maintenance state.

In the operational state the side panels cover the inside of the heat pump frame kit and close off the inside of the heat pump frame kit to prevent accidental access of by-passers or dust. At least one side panel, in particular two side panels can be removed or opened to provide access to the inside of the heat pump frame kit. This allows maintenance personnel to access the heat pump frame kit without the need to remove the boiler unit and/or the boiler frame kit. Depending on the circumstances, the maintenance personnel may access from one side or the other side. In case one side panel can be removed for servicing of components of the heat pump frame kit, the heat pump frame kit according to the invention can be provided selectively accessible from the left-hand side or the right-hand side in an installation position. Selectively means within the application that only a specific selection among a limited number of options is made.

According to an embodiment the heat pump frame kit comprises a control unit. The control unit is used for controlling the heat pump unit and/or the boiler unit. Additionally, the control unit can be used to control the components discussed above that are arranged in the heat pump frame kit.

According to an embodiment the heat pump frame kit comprises an expansion vessel. The expansion vessel comprises air and water from a load circuit for the central heating. The expansion vessel maintains a predetermined level of pressure in the load circuit. Expansion vessels are also referred to as expansion tanks. Expansion vessels have various designs. One common design is a rectangular shaped container. Also known are cylinder or disk shaped expansion vessels. The expansion vessel is split in two parts by diaphragm. One part is filled with water from the load circuit, the other part is filled with nitrogen. An expansion vessel further comprises an air valve which allows for the expansion vessel to be depressurized and repressurized as needed. The air valve is used to check the pressure of the expansion vessel and correct it if necessary. For testing, the expansion vessel on the water side must first be depressurized. According to an embodiment the heat pump frame kit comprises a mounting fixture for a boiler unit or the heat pump unit. The mounting fixture allows for easy installation, in particular only requiring one installer. The mounting fixture can be comprised in or part of the support panels. The mounting fixture can comprise two protruding sheet metal strips on the top right and on the top left, respectively (in installation position). The mounting fixture can be designed such, that the out-out in a rear panel of a boiler unit, in particular a boiler frame kit, can be accommodated and the weight of the boiler unit, in particular the boiler frame kit, is introduced into the frame of the heat pump frame kit. In other words, the frame of the heat pump frame kit replaces a mounting rail of the boiler unit, in particular a boiler frame kit, which is otherwise attached to the wall with screws. The mounting fixture can be a mounting bracket.

According to an embodiment the heat pump frame kit comprises a receiving portion in which selectively an expansion vessel or a control unit can be arranged.

In case the control unit is selected to be arranged in the receiving portion of the heat pump frame kit, the expansion vessel can be arranged in the boiler unit or can be arranged outside an energy system. This has the advantage, that the configuration of the heat pump frame kit can be constructively easily optimized to the respective installation needs, requirements and limitations.

The heat pump coupling kit according to the invention allows for particularly easy optimization of the configuration of the heat pump coupling kit to fit the needs, requirements and limitations of the respective installation space. In case the control unit selected to be arranged in the receiving portion of the heat pump frame kit, the expansion vessel can be arranged in the boiler unit or can be arranged outside an energy system. This has the advantage, that the configuration of the heat pump frame kit can be constructively easily optimized to the respective installation needs, requirements and limitations.

The control unit may be integrated in the heat pump frame kit. The control unit may be configured to control the heat pump unit and/or the boiler unit to which the heat pump frame kit may be connected. The control unit comprises one or more processors or be a processor. Alternatively, the control unit can be a control board circuit or can be part of a control board circuit. Any or all sensors, pumps, actuators, room units of the energy system can be connected the controller unit, wirelessly or via electric lines. According to an embodiment the at least one load connector set for connecting a cavity of the distributor with at least one load circuit of an energy system comprises an outlet connector configured to convey water from the distributor to the at least one load circuit and a return connector configured to convey water from the at least one load circuit, via the heat exchanger, to the distributor, in particular to the cavity of the distributor.

Downstream from the return connector and upstream of the heat exchanger a pump may be provided to convey the water through the system.

According to a further embodiment the heat pump frame kit comprises a filter, in particular a magnetic filter, positioned downstream of a return connector of the load connector set, the return connector being configured to convey water from the at least one load circuit to the distributor, in particular via the heat exchanger.

The (magnetic) filter is configured to filter pollution from the water returning from the load circuit(s), to prevent pollution from reaching the pump and the heat exchanger. The (magnetic) filter is preferably positioned downstream from the return connector and upstream of the pump and heat exchanger.

According to a further aspect there is provided a boiler frame kit for a hybrid energy transformation device, comprising o a frame for connecting the boiler frame kit to a heat pump frame kit and/or o at least one control unit wherein the control unit is configured for controlling a boiler unit and/or a heat pump unit.

The hybrid energy transformation device comprises a heat pump frame kit as described herein, further comprises at least one boiler unit, in particular comprising a boiler frame kit as described herein, wherein the heat pump frame kit supports the boiler unit, in particular the boiler frame kit and wherein the hybrid energy transformation device comprises at least one heat pump unit and wherein preferably the heat pump frame kit is fluidically connected to the at least one heat pump unit.

The boiler frame kit is configured to be attached to the heat pump frame kit. The boiler frame kit may be a newly installed boiler unit which is now combined with a heat pump unit using the heat pump frame kit. According to an embodiment the boiler frame kit comprises a mounting fixture for a control unit.

According to an embodiment the boiler frame kit comprises a mounting fixture for a boiler control unit.

The boiler control unit may be integrated in the boiler frame kit. The boiler control unit may be configured to control the boiler unit, the heat pump unit and/or the heat pump frame kit.

According to an embodiment the boiler frame kit comprises a control panel, which is configured to or configurable to communicate with the boiler control unit.

The boiler control unit may be configured to control and communicate with boiler parts, including sensors, pumps, actuators, room units via wired or wireless connections (including internet). The control unit comprises one or more processors or be a processor. Alternatively, the control unit can be a control board circuit or can be part of a control board circuit. Any or all sensors, pumps, actuators, room units of the energy system can be connected the controller unit, wirelessly or via electric lines. The boiler control unit may comprise recesses for receiving plugs.

According to an aspect there is provided a hybrid energy transformation device comprising a heat pump frame kit as described, further comprising a boiler unit, comprising a boiler frame kit as described wherein the heat pump frame kit supports the boiler unit, in particular the boiler frame kit, and wherein the hybrid energy transformation device comprises at least one heat pump unit, and wherein the heat pump frame kit is fluidically connected to the at least one heat pump unit.

According to an aspect there is provided an energy system, comprising a hybrid energy transformation device as described and a heat pump unit.

According to an embodiment, there is provided an energy system, further comprising at least one load circuit. The load circuit can be a central heating circuit or a domestic hot water circuit. The central heating circuit can comprise a radiator for heating a room and/or can be a floor heating. The domestic hot water circuit provides hot water for e.g. showering. An energy system comprising more load circuits can comprise one or more central heating circuits and/or one or more domestic hot water circuits. The energy system may comprise one load circuit, or two or more load circuits. The load circuits may be selected from a central heating or cooling circuit and a domestic hot water circuit.

When the energy system is used for cooling purposes, the pipes and components are preferably insulated, in particular diffusion-proof insulated, to prevent condensation formation. Diffusion-proof, also referred to as diffusion-tight insulation is diffusion-proof cold and heat insulation.

The invention further relates to the use of the heat pump frame kit and/or boiler frame kit in a hybrid energy transformation device as described or in an energy system as described.

According to an aspect there is provided a method of installation a hybrid energy transformation device as described, the method comprising a) installing a heat pump frame kit as described by connecting it to a wall and b) installing a boiler unit, in particular a boiler frame kit according to the invention to the heat pump frame kit.

According to an embodiment the method further comprises removing an existing boiler unit before commencing with a). The method may further comprise connecting the at least one load connector set for connecting a cavity of the distributor with at least one load circuit of an energy system. The method may further comprise connecting the first boiler connector set to a first load circuit via the set of coupling elements. The method may further comprise selectively arranging an expansion vessel or a control unit in a receiving slot of the heat pump frame kit.

According to an embodiment, an energy system as described comprises a hybrid energy transformation device, which can be installed in a first and second implementation. The boiler unit is installed to a wall and a heat pump frame kit can be installed behind the existing boiler unit as part of an energy system (first implementation) or the boiler unit can be replaced by a heat pump frame kit and a replacement boiler unit, in particular a boiler frame kit (second implementation) and the frame kits are connected to provide a hybrid energy transformation device as part of the energy system.

Dismantling of existing boiler unit As preceding steps prior to the removal of the boiler unit from the wall, the following can be performed. In a step, a system on the water and gas side is shut off using an existing connector set of a load circuit, in particular shut-off valves, in particular a set of shut off valves for gas and a central heating load circuit. The boiler unit is drained. The connector set, in particular the set of shut-off valves can remain in place but can also be replaced if necessary. In case of a second heating circuit, a respective pump or pump group of said second heating circuit is shut off, pipes of the second heating circuit to the boiler unit are drained and respective the connections are uninstalled. If needed, in a further step, a drinking water storage tank which can be located under the boiler unit, can be uninstalled. In a further step, electrical connections of the boiler unit are disconnected, a condensate drain and a flue gas connection of a flue gas system to the boiler unit can be uninstalled. If needed, a new flue gas system can be installed.

Installation of a hybrid energy transformation device according to the first implementation

In the first implementation, in a first step, the heat pump frame kit is installed by connecting it to the wall and the previously removed boiler unit is installed in a further step by connecting the boiler unit to the heat pump frame kit. The boiler unit can advantageously be installed using the two protruding sheet metal strips of the mounting fixture positioned on the top right and on the top left (in installation position) of the frame of the heat pump frame kit, respectively. The mounting fixture can be designed such, that the out-out in a rear panel of the boiler unit can be accommodated and the weight of the boiler unit is introduced into the frame of the heat pump frame kit. The mounting fixture can be a mounting bracket as described. In other words, the frame of the heat pump frame kit replaces a mounting rail of the boiler unit, in particular a boiler frame kit, which is otherwise attached to the wall with screws. Further details of the installation process are described for the second implementation and also apply to the first implementation.

Installation of a hybrid energy transformation device according to the second implementation

In a first step of the second implementation, a heat pump frame kit is installed by connecting it to the wall and a boiler unit, in particular a boiler frame kit, is installed in a further step by connecting the boiler unit, in particular the boiler frame kit, to the heat pump frame kit. The heat pump frame kit comprises at least one load connector of a connector set which is hold by the jig and which fluidically connects a cavity of the distributor with at least one load circuit of an energy system. The at least one connector is configured to be connected to a corresponding connector, in particular a shut-off valve, of a corresponding connector set of the load circuit in case the distributor is fluidically connected to the load circuit.

The frame of the heat pump frame kit can be aligned with the aid of an integrated spirit level. In the upper left and right corner of the frame of the heat pump frame kit two drill holes each can be provided, through which the frame of the heat pump frame kit can be screwed to the wall, for example by means of key screws.

Optional Right /Left Selection

Depending on the conditions on site (niches, walls, fixtures, closets, etc.), a pump, a heat exchanger, and optionally a switch valve of the heat pump frame kit may not be accessible in the frame of the heat pump frame kit without having to remove the boiler unit, in particular in the form of the boiler frame kit. In the event of maintenance, repair, replacement or to carry out a hydraulic balancing, side panels as described of the heat pump frame kit according to the invention can be easily removed. For example, in case of a niche installation with a accessibility of an installed hybrid energy transformation device from the right side, a removable right-hand side panel could be removed to access the pump, the heat exchanger and the switch valve. It is conceivable that an installer in a planning step prior to the installation, can choose for a product as a right-hand version or a left-hand version. In other words, in case one side panel can be removed for servicing of components of the heat pump frame kit, the heat pump frame kit according to the invention can be provided selectively accessible from the left-hand side or the right-hand side in the installation position.

Boiler unit, in particular a boiler frame kit installation

As a subsequent step, a boiler unit, in particular a boiler frame kit as described can be installed on the heat pump frame kit. This can be constructively easily achieved by hooking the boiler unit, in particular the boiler frame kit into the mounting fixture of the heat pump frame kit. The mounting fixture can for example provided as a mounting bracket, configured to be arranged on the frame of the heat pump frame kit. The connecting set for boiler flow, boiler return flow and gas can be connected to the heat pump frame kit. The offset from the old to the new connection on the boiler preferably is 150 mm which is the depth of the frame of the heat pump frame kit. The flue gas connection can be re-established to a new flue gas system or to the existing system.

Installation of a control unit

The boiler unit, in particular the boiler frame kit, can be opened and a control unit can be installed, which control unit can be pre-mounted in the boiler frame kit or in the boiler unit. The control unit can also be arranged, in particular pre-mounted, in the heat pump frame kit, allowing for constructively easy adaption of the installation depending on the specific conditions on site. Existing electrical lines of the energy system can be rewired to the control unit, such as a domestic hot water sensor, a room unit, an outdoor sensor, a pump and mixer of a second heating circuit. The control unit according to the invention can comprise pre-installed lines.

Plug in connectors of the pump and the switch valve of the heat pump frame kit can be connected to the control unit. Subsequently, a boiler front cover can be installed.

All system components connected to the control unit, such as the heat pump unit, the boiler unit and any consumers of the energy system, can be controlled via a boiler unit control panel.

The commissioning of the installed boiler unit, including leak test, flue gas measurement, etc., can be carried out as usual.

The invention further relates to a method of operation of an energy system according to the invention, wherein an operation mode of a heat pump unit and of a boiler unit is selected dependent on an outside air temperature and/or an outlet temperature of a load circuit liquid, and/or a threshold value of at least 2,5 COP for the heat pump unit. The COP value is defined as the relationship between the power (kW) that is drawn out of the heat pump as cooling or heat, and the power (kW) that is supplied to the compressor. The COP value can be determined according to DIN EN 14511.

A further problem to be solved by the application is to provide a method to optimize the use of renewable energies during operation of an energy system, wherein the energy system is a compact energy system which allows for improved sustainability compared to known compact hybrid systems, such as the system described in EP4145058A1 , in particular in fig. 6, which in particular allows for the boiler to be used only if the use fulfils pre-defined requirements and wherein the boiler can be in particular shut-off and wherein the temperature loss is reduced compared to a known energy system such as the system described in in fig. 6 EP4145058A1.

According to an embodiment, the method further comprises that the heat pump unit and/or the boiler unit is selected such that in a first operation mode the boiler unit is operated and the heat pump unit is deactivated when the outside air temperature is 0 °C, in particular -4 °C, in particular -5 °C, in particular -7°C, in particular -10 °C or less. Alternatively, such that in a first operation mode the heat pump unit is operated and the boiler unit is deactivated or only provides peak load coverage when the outside air temperature is greater than -10 °C, in particular -7 °C , in particular -5 °C, in particular -4 °C, in particular 0 °C and the outlet temperature of the load circuit liquid is less than 55 °C, in particular less than 52 °C, in particular less than 50 °C, in particular less than 45 °C, in particular less than 35 °C. Alternatively, such that in a first operation mode the boiler unit is operated and the heat pump unit is deactivated when the outlet temperature of the load circuit liquid is 35 °C, in particular, 45 °C , in particular 50°C , in particular 53 °C, in particular 55 °C or greater.

According to an embodiment, the heat pump unit and/or the boiler unit is selected such that a heat load of the heat pump unit is at least 30% at 2 °C outside air temperature and 35 °C outlet temperature of the load circuit liquid.

This has the additional advantage that the method is particularly optimized to the use of renewable energies.

In a further embodiment, the first mode comprises that the selection comprises a delay time for switching on the boiler unit depending on at least one outside temperature condition I threshold.

This has the additional advantage that the heat pump use is further optimized by delaying the use of the boiler even further.

In a further embodiment, the first mode comprises a step of selecting a heating zone or room in a building, The first mode can further comprise a pre-heating setting wherein a target temperature is reached over a time period. The time period is selected, received or inputted. This pre-heating step has the additional advantage, that the heat pump unit and/or the boiler unit can operate in a low power mode, whereby the efficiency is further enhanced.

Instead of the first operation mode or additionally, in a further embodiment, the method comprises an alternative or second operation mode, wherein the heat pump unit and/or the boiler unit is alternatively or additionally selected based on the actual or forecasted energy cost price. The method further comprising a step of selecting, receiving or inputting at least one cost parameter.

This has the additional advantage that in addition or as a starting point for the user, the optimization can be based on cost price of the energy used.

Instead of the first operation mode or additionally, in a further embodiment, the method comprises an alternative or third operation mode, wherein the heat pump unit and/or the boiler unit is alternatively or additionally selected based on actual, simulated or forecasted CO2 emission threshold.

The method can further comprise the step of selecting, receiving or inputting at least one CO2 parameter.

This has the additional advantage that flexible to renewable, sustainable energies are chosen based on their CO2 footprint parameters.

In a further embodiment, the method comprises a step of using surplus energy of a PV module of the energy system, wherein the energy of the PV module can be transferred to a buffer tank or used in the operational mode of the heating unit or the boiler unit. This has the additional benefit that the efficiency is further enhanced.

This has the additional advantage that local renewable energy can be stored optimally and enhance sustainability.

The invention further relates to a computer program product comprising programmed instructions for controlling an energy management system as described, wherein the programmed instructions, when executed on a processor of a control unit configured for controlling a boiler unit as described and/or a heat pump unit as described, cause the control unit to carry out the method as described for selecting the heat pump unit and/or the boiler unit. In the figures, the subject-matter of the invention is schematically shown, wherein identical or similarly acting elements are usually provided with the same reference signs.

Figures 1 schematically show a heat pump frame kit according to an embodiment,

Figures 2a, b schematically show a hybrid energy transformation device according to an embodiment,

Figures 3 schematically shows a back view of a heat pump frame kit according to an embodiment,

Figure 4 schematically shows an energy system according to an embodiment and first and second installation implementation, and

Figure 5 schematically depicts a mounting bracket, and

Figure 6 schematically shows a complete hybrid heat pump product according to the prior art.

Fig. 1 schematically depicts a heat pump frame kit 1 for a hybrid energy transformation device 600.

The heat pump frame kit 1 comprises a frame 2, which is configured to be attached to a wall. The frame 2 may comprise one or more back panels 3 which, when installed, are positioned against the wall. The back panels 3 may comprise one or more holes for to facilitate attaching the heat pump frame kit 1 to the wall with screws, hooks, nails or the like.

The frame 2 may further be configured to connect to a boiler unit 500, in particular a boiler frame kit 100. When installed, the heat pump frame kit 1 is positioned in between the wall and the boiler unit 500, in particular the boiler frame kit 100. Fig.’s 2a and 2b show the heat pump frame kit 1 connected to a boiler unit 500 shown as the boiler frame kit 100.

The frame 2 may further comprise two side panels 6, shown in Fig. 2b. Fig. 2a shows the same, without side panels 6.

The side panels 6 can comprise at least one of steel, aluminium, a polymeric, in particular a thermoplastic material, and a composite material or can be made of steel, aluminium, a polymeric, in particular a thermoplastic material, and a composite material. Steel provides for strong and durable side panels. The aluminium, the polymeric, in particular the thermoplastic material, and the composite material may be used to reduce the noise generated by the heat pump frame kit and the boiler unit and reduce the weight of the respective unit.

The side panels 6 may be attached to the frame 2 in a removable or openable manner. The side panels 6 may be configured to be attached to the frame 2 in an operational state to close off the interior of the heat pump frame kit 1 and are configured to be opened or removed from the frame in a maintenance state to allow access to the interior of the heat pump frame kit 1 . The side panels 6 may be connected to the frame 2 via a hinge, allowing the side panels 6 to be opened.

The heat pump frame kit 1 is configured to be connected to a heat pump unit 200. The heat pump frame kit 1 comprises at least one heat pump connector set 14 for connection to a heat pump unit 200. The heat pump unit 200 may be any kind of suitable heat pump unit 200. Heat pump units 200 comprise a refrigerant circulation system in which a refrigerant is circulated to transfer heat. Such a refrigerant circulation system comprises a compressor, an expansion valve, a source medium-refrigerant heat exchanger and a refrigerant-destination medium heat exchanger. According to the embodiment, the refrigerant-destination medium heat exchanger 9 is arranged in the frame 2 of the heat pump frame kit 1 , while the other components are in the heat pump unit 200. The heat pump unit 200 may be a split heat pump comprising all further components of the refrigerant circulation system or may comprise an indoor and an outdoor unit together comprising all further components of the refrigerant circulation system, the outdoor unit comprising the source medium refrigerant heat exchanger. The source medium may be air or water. The destination medium may be water.

As shown in Fig. 1 , the heat pump frame kit 1 comprises a heat exchanger 9 for heat exchange between a refrigerant of a heat pump unit 200 and a load circuit 300.

Further provided is a distributor 10, which is fluidically connected to the heat exchanger 9 to receive water from the heat exchanger 9 which is heated or cooled by the refrigerant in the heat exchanger 9. The distributor 10 comprises a cavity in which water can be collected from the heat exchanger 9, the boiler unit 500 and from which water can be discharged to the boiler unit 500 and to the one or more load circuits. The distributor 10 is arranged within a volume delimited by the frame 2, in the figure the distributor 10 is connected to the frame 2. The distributor 10 shown is a 4-way distributor. Also a 6-way distributor is a suitable example for the distributor 10. The distributor 10 is a hydronic or hydraulic distributor by means of which a liquid, in particular water, as an energy carrier is distributed between the heat pump unit and/or boiler on one side and at least one load circuit on the other side. The terms hydraulic and hydronic are used synonymously.

The heat pump frame kit 1 comprises a set of coupling elements 15 to fluidically connect a first boiler connector set 18 to a first load circuit. The coupling elements 15 may be short tubes or intermediate piping elements. These coupling elements 15 facilitate fluidically connecting a first boiler connector set to for instance a domestic warm water load circuit.

The distributor 10 comprises at least one load connector set 17 for connecting a cavity of the distributor 10 with at least one further load circuit of an energy system 400, e.g. central heating circuit). Preferably, at least one load connector set 17 is positioned such that it is connected with a corresponding connector set of a load circuit. The load connector set 17 may be arranged at a standard distance from the wall (or the parts of the heat pump frame kit to be positioned against the wall, i.e. the back panel(s)) and at a standard mutual distance relative to each other, i.e. the first connector and the second connector are at a standard mutual distance relative to each other. The distances are all measured from the centre point of the connectors. The distance from the wall may be in the range of 70 - 80 mm, for instance 60 mm. The mutual distance may be in the range of 60 - 70 mm, for instance 75 mm.

As shown in Fig. 1 , the heat pump frame kit 1 comprises a jig 4 holding the at least one load connector set 17, the coupling elements 15 and a fuel connection 19. The jig is connected to the frame 2 and provides for a standardized, easy to reach place to make different connections.

The fuel connection 19 facilitates connecting a fuel supply, such as for instance a domestic gas line, to the boiler unit 500.

Fig. 1 further shows expansion vessel 26. The expansion vessel 26 comprises air and water from a load circuit 300 for the central heating. The expansion vessel 26 maintains a predetermined level of pressure in the load circuit 300. Expansion vessels 26 are also referred to as expansion tanks. Expansion vessels 26 have various designs. One common design is a rectangular shaped container. Also known are cylinder or disk shaped expansion vessels. The expansion vessel 26 is split in two parts by diaphragm. One part is filled with water from the load circuit 300, the other part is filled with nitrogen. An expansion vessel 26 further comprises an air valve which allows for the expansion vessel 26 to be depressurized and repressurized as needed. The air valve is used to check the pressure of the expansion vessel 26 and correct it if necessary. For testing, the expansion vessel 26 on the water side must first be depressurized.

The heat pump frame kit 1 may comprise a control unit 25. An example of this is shown in Fig. 3, schematically showing a back view of a heat pump frame kit 1 , comprising a control unit 25. For reasons of clarity, the frame 2 is not shown. In case the control unit 25 is selected to be arranged in the receiving portion of the heat pump frame kit 1 , the expansion vessel 26 can be arranged in the boiler unit 500 or can be arranged outside an energy system 400. This has the advantage, that the configuration of the heat pump frame kit 1 can be constructively easily optimized to the respective installation needs, requirements and limitations.

The heat pump frame kit may comprise a receiving portion in which selectively an expansion vessel 26 or a control unit 25 can be arranged.

The control unit 25 may be integrated in the heat pump frame kit. The control unit may be configured to control, the heat pump unit and/or the boiler unit to which the heat pump frame kit may be connected. The control unit comprises one or more processors or be a processor. Alternatively, the control unit can be a control board circuit or can be part of a control board circuit. Any or all sensors, pumps, actuators, room units of the energy system can be connected the controller unit, wirelessly or via electric lines (not shown).

Fig. 4 shows a more schematic overview of the system, showing an energy system 400. The energy system 400 comprises a heat pump unit 200 connected to a so-called hybrid energy transformation device 600, which is formed by the heat pump frame kit 1 and a boiler unit 500, in particular a boiler frame kit 100. The boiler unit 500 is configured to be connected to the heat pump frame kit 1 by means of frame 2, which is not shown in Fig. 4.

Fig. 4 schematically shows a first boiler connection set 18, which fluidically connects the boiler unit 500 to a first load circuit 300, by-passing the coupling elements 15 and nonshown connectors of the load circuit 300. The first load circuit 300 may be a domestic warm water circuit, used for tap-water and showering. The distributor 10, in particular a cavity of the distributor 10, is depicted, being fluidly connected to the boiler unit 500 via a second boiler connector set 18’ and corresponding boiler pipes 28. That means, the boiler unit 100 is fluidically connected with the distributor 10 by means of the second boiler connector set 18’. The heat exchanger 3 is shown, which is fluidly connected to a heat pump unit 200 via heat pump connector set 14 and corresponding refrigerant pipes. The distributor 10 is connected to a second load circuit 300 via load connector set 17. The second load circuit 300 may be a central heating circuit.

Load connector set 17 for connecting a cavity of the distributor 10 with at least one load circuit of an energy system 400 comprises an outlet connector 17 configured to convey water from the distributor 10 to the at least one load circuit 300 and a return connector 17 configured to convey water from the at least one load circuit to the distributor 10, in particular to the cavity of the distributor 10. This return flow is not directly connected to the distributor 10, but to the heat exchanger 9 from which the water flows to the distributor 10, in particular to the cavity of the distributor 10. The connection between the return connector 17 and the heat exchanger is provided by a return pipe 29.

The return pipe comprises a pump 30 to pump water from the load circuit 300 to the heat exchanger 9.

The return pipe comprises a filter 31. In the embodiment depicted there is provided a magnetic filter, filtering pollution from the returning water, thereby protecting the heat exchanger 9 and the pump 30. The filter 31 is positioned upstream from the pump 30 and the heat exchanger 9.

Further provided is a further return pipe 32, which fluidically connects the heat exchanger 9 and the collector 10 to convey water from the heat exchanger 9 to the collector 10. The further return pipe 32 may comprise a flow meter.

When the outside temperatures are such that the heat pump unit 200 does not work (efficiently), the boiler unit 500 takes water from the distributor 10, returns heated water to the distributor 10 via the second boiler connector set 18’. From the distributor 10 warm water is send to the load circuit 300 and returned from the load circuit 300 via load connector set 17. This water flows through the heat exchanger 9, without exchanging heat with the refrigerant. When the outside temperatures are such that the heat pump unit 200 and the boiler unit 500 work together, water that is returned from the load circuit 300 is heated by the refrigerant from the heat pump unit 200 in the heat exchanger 9 before it is returned to the distributor. To heat the water further, the boiler unit 500 still takes water from the distributor 10 and returns heated water to the distributor 10 via second boiler connector set 18’.

When the outside temperatures are such that the heat pump unit 200 can work without support from the boiler unit 500, water that is returned from the load circuit 300 is heated by the refrigerant from the heat pump unit 200 in the heat exchanger 9 before it is returned to the distributor. The boiler unit 500 is idle and no water it taken from the distributor 10 and returned to the distributor 10 via second boiler connector set 18’.

The energy system 400 as shown schematically in Fig. 4 comprises a hybrid energy transformation device 600, which can be installed in a first and second implementation. The boiler unit 500 is installed to a wall and a heat pump frame kit 1 can be installed behind the existing boiler unit 500 as part of an energy system 400 (first implementation) or the boiler unit 500 can be replaced by a heat pump frame kit 1 and a replacement boiler unit 500, in particular a boiler frame kit 100 (second implementation) and the frame kits are connected to provide a hybrid energy transformation device 600 as part of an energy system 400.

Dismantling of existing boiler unit 500

As preceding steps prior to the removal of the boiler unit 500 from the wall, the following is performed. In a step, a system on the water and gas side (not shown) is shut off using an existing connector set 17 of a load circuit 300, in particular shut-off valves 43, in particular a set of shut off valves 36 for gas and a central heating load circuit. The boiler unit 500 is drained. The connector set 17, in particular the set of shut-off valves can remain in place but can also be replaced if necessary. In case of a second heating circuit, a respective pump or pump group of said second heating circuit is shut off, pipes of the second heating circuit to the boiler unit 500 are drained (not shown) and respective the connections are uninstalled. If needed, in a further step, a drinking water storage tank (not shown) which can be located under the boiler unit 500, can be uninstalled. In a further step, electrical connections of the boiler unit 500 are disconnected, a condensate drain (not shown) and a flue gas connection of a flue gas system (not shown) to the boiler unit 500 can be uninstalled. If needed, a new flue gas system (not shown) can be installed.

Installation of a hybrid energy transformation device 600 according to the first implementation

In the first implementation, in a first step, the heat pump frame kit 1 is installed by connecting it to the wall and the previously removed boiler unit 500 is installed in a further step by connecting the boiler unit 500 to the heat pump frame kit 1. The boiler unit 500 can advantageously be installed using the two protruding sheet metal strips 42 of the mounting fixture 39 positioned on the top right and on the top left (in installation position) of the frame 2, respectively. The mounting fixture 39 is designed such, that the out-out in a rear panel of the boiler unit 500 can be accommodated and the weight of the boiler unit 500 is introduced into the frame 2. The mounting fixture can be a mounting bracket 40 as shown in Fig. 5. In other words, the frame 2 replaces a mounting rail (not shown) of the boiler unit 500, in particular a boiler frame kit 100, which is otherwise attached to the wall with screws (not shown). Further details of the installation process are described for the second implementation and also apply to the first implementation.

Installation of a hybrid energy transformation device 600 according to the second implementation

In a first step of the second implementation, a heat pump frame kit 1 is installed by connecting it to the wall and a boiler unit 500, in particular a boiler frame kit 100, is installed in a further step by connecting the boiler unit 500, in particular the boiler frame kit 100, to the heat pump frame kit 1. At least one load connector 17 of a connector set, which is hold by the jig 4 and which fluidically connects a cavity of the distributor 10 with at least one load circuit 300 of an energy system 400. The at least one connector 17 is configured to be connected to a corresponding connector, in particular a shut-off valve, of a corresponding connector set of the load circuit in case the distributor 10 is fluidically connected to the load circuit 300. T. The frame 2 can be aligned with the aid of an integrated spirit level (not shown). In the upper left and right corner of the frame 2 two drill holes each can be provided, through which the frame 2 can be screwed to the wall, for example by means of key screws.

/Left Execution Depending on the conditions on site (niches, walls, fixtures, closets, etc.), a pump, a heat exchanger 41 and optionally a switch valve 23 may not be accessible in the frame 2 without having to remove the boiler unit 500, in particular in the form of the boiler frame kit 100. In the event of maintenance, repair, replacement or to carry out a hydraulic balancing, the side panels 6 can be easily removed. For example, in case of a niche installation, in case of a niche installation with an accessibility of an installed hybrid energy transformation device 600 from the right side, a removable right-hand side panel 6 could be removed to access the pump, the heat exchanger and the switch valve. It is conceivable that an installer in a planning step prior to the installation, can choose for a product as a right-hand version or a left-hand version. In other words, in case one side panel 6 can be removed for servicing of components of the heat pump frame kit 1 , the heat pump frame kit 1 can be provided selectively accessible from the left-hand side or the right-hand side in the installation position.

Boiler unit 500, in particular a boiler frame kit 100 installation

As a subsequent step, a boiler unit 500, in particular a boiler frame kit 100 can be installed on the heat pump frame kit 1. This can be constructively easily achieved by hooking the boiler unit 500, in particular the boiler frame kit 100 into the mounting fixture 39, for example provided as a mounting bracket 40 as shown in fig. 9, provided on the frame 2. The connecting set 15 for boiler flow, boiler return flow and gas to the heat pump frame kit 1. The offset from the old to the new connection on the boiler preferably is 150 mm which is the depth of the frame 2. The flue gas connection can be re-established to a new flue gas system or connection to the existing system (not shown).

Installation of a control unit 25

The boiler unit 500, in particular the boiler frame kit 100, can be opened and a control unit 25 can be installed, which can be pre-mounted in the boiler frame kit 100, in the boiler unit 500. The control unit 25 can also be arranged, in particular pre-mounted, in the heat pump frame kit 1 , allowing for constructively easy adaption of the installation depending on the specific conditions on site. The existing electrical lines of the energy system 400 can be rewired to the control unit 25, such as a domestic hot water sensor, a room unit, an outdoor sensor, a pump and mixer of a 2^nd heating circuit. The controller 25 according to the invention can comprise pre-installed lines. Plug in connectors of the pump 22 and the switch valve 23 can be connected to the control unit 25. Subsequently, a boiler front cover can be installed.

All system components connected to the control unit 25, such as the heat pump unit 200, the boiler unit 500 and any consumers (not shown), can be controlled via a boiler unit control panel 44.

The commissioning of the boiler unit 500, including leak test, flue gas measurement, etc. , can be carried out as usual.

Fig. 5 schematically depicts a mounting bracket 40.

Fig. 6 shows a complete hybrid heat pump product 700 according to the prior art, comprising a heat pump unit 800 with an heat exchanger, an out-door unit (not shown), and a boiler unit 900 in one compact system, wherein a load line 36 of the heat pump unit 800 and a load line 37 of the boiler unit 900 are directly fluidically connected via a T-piece 34 to the load connector to the load circuit for a central heating 35. The complete hybrid heat pump product 700 allows for components of the units (800, 900) to be accessed from the front F of the complete hybrid heat pump product 700.

Reference Signs

1. Heat pump frame kit

2. Frame

3. Back panel

4. Jig

6. Side panel

9. Heat exchanger

10. Distributor

14. Heat pump connector set

15. Coupling elements

17. Load connector set (heating/cooling), feed flow or return flow

18. (First/second) boiler connection set

19. Fuel connection

25. Control unit

26. Expansion vessel

27. Refrigerant pipes

28. Boiler pipes

29. Return pipe

30. Pump

31. Filter

32. load connector

33. corresponding connector of a corresponding connector set of the load circuit

34. T-piece

35. load circuit for a central heating

36. load line (heat pump unit 800)

37. load line (boiler unit 900)

38. receiving portion

39. mounting fixture for a boiler

40. Mounting bracket

41. Heat exchanger

42. sheet metal strips

43. shut-off valve

44. boiler unit control panel

45 connecting set for boiler flow

100. Boiler frame kit 200. Heat pump unit

300. Load circuit

400. Energy system

500. Boiler unit

600. Hybrid energy transformation device

700. Complete hybrid heat pump product

800. Heat pump unit

900. Boiler unit

F. Front

Claims

PATENT CLAIMS

1. Heat pump frame kit (1) for a hybrid energy transformation device, the heat pump frame kit (1) comprising a frame (2) for connecting the heat pump frame kit (1) to a wall and to a boiler unit (500) and a heat exchanger (9) for heat exchange between a refrigerant of a heat pump unit (200) and a load circuit (300), wherein the heat exchanger (9) is arranged within a volume delimited by the frame (2) and a distributor (10) arranged within the volume delimited by the frame (2), in particular connected to the frame (2), and fluidically connected to the heat exchanger (9), wherein the distributor (10) comprises at least one load connector set (17) for connecting a cavity of the distributor (10) with at least one load circuit of an energy system (400) wherein the at least one load connector set (17) for connecting a cavity of the distributor (10) with at least one load circuit (300) of an energy system (400) comprises an outlet connector configured to convey water from the distributor (10) to the at least one load circuit (300) and a return connector configured to convey water from the at least one load circuit (300), via the heat exchanger (9), to the distributor (10), in particular to the cavity of the distributor (10).

2. Heat pump frame kit (1) according to any one of the preceding claims, wherein the heat pump frame kit (1) comprises a set of coupling elements (15) to fluidically connect a first boiler connector set (18) to a first load circuit (300).

3. Heat pump frame kit (1) according to any one of the preceding claims, wherein the heat pump frame kit (1) comprises a jig (4), the jig (4) holds

• the at least one load connector set (17) and/or

• the coupling elements (15) and/or

• a fuel connection (19).

4. Heat pump frame kit (1) according to claim 3, wherein the jig (4) is connected to the heat pump frame kit (1), in particular to the frame (2) or to back panels (3) of the heat pump frame kit (1).

5. Heat pump frame kit (1) according to any one of the preceding claims, wherein the heat pump frame kit (1) comprises two side panels (6).

6. Heat pump frame kit (1) according to claim 5, wherein the side panels (6) comprise at least one of steel, aluminium, a polymeric, in particular a thermoplastic material, and a composite material or can be made of steel, aluminium, a polymeric, in particular a thermoplastic material, and a composite material.

7. Heat pump frame kit (1) according to any one of the claims 5 - 6, wherein the side panels (6) are configured to be attached to the frame (2) in an operational state of the heat pump support frame kit (1) and are configured to be opened or removed from the heat pump support frame kit (1) in a maintenance state.

8. Heat pump frame kit (1) according to any one of the preceding claims, wherein the heat pump frame kit (1) comprises a control unit (25).

9. Heat pump frame kit (1) according to any one of the preceding claims, wherein the heat pump frame kit (1) comprises an expansion vessel (26).

10. Heat pump frame kit (1) according to any one of the preceding claims, wherein the heat pump frame kit (1) comprises a receiving portion (38) in which selectively an expansion vessel (26) or a control unit (25) can be arranged.

11. Heat pump frame kit (1) according to any one of the preceding claims, wherein the at least one load connector set (17) for connecting a cavity of the distributor (10) with at least one load circuit (300) of an energy system (400) comprises an outlet connector configured to convey water from the distributor (10) to the at least one load circuit (300) and a return connector configured to convey water from the at least one load circuit (300), via the heat exchanger (9), to the distributor (10).

12. Heat pump frame kit (1) according to any one of the preceding claims, wherein the heat pump frame kit (1) comprises a filter (31), in particular a magnetic filter, positioned downstream of a return connector of the load connector set (17) and/or the return connector being configured to convey water from the at least one load circuit (300) to the distributor (10), in particular via the heat exchanger (9).

13. Boiler frame kit (100) for a hybrid energy transformation device, comprising o a frame for connecting the boiler frame kit (100) to a heat pump frame kit (1) and/or o at least one control unit wherein the control unit is configured for controlling a boiler unit (500) and/or a heat pump unit (200).

14. Boiler frame kit (100) according to claim 13, wherein the boiler frame kit (100) comprises a mounting fixture (39) for a boiler control unit (25).

15. Boiler frame kit (100) according to claim 14, wherein the boiler frame kit (100) comprises a control panel (44), which is configured to or configurable to communicate with the boiler control unit (25).

16. Hybrid energy transformation device comprising (600) a heat pump frame kit (1) according to any one of the claims 1 - 12, further comprising at least one boiler unit (500), comprising a boiler frame kit (100) according to any one of the claims 13 - 15, wherein the heat pump frame kit (1) supports the boiler unit (500), in particular the boiler frame kit (100), and wherein the hybrid energy transformation device (600) comprises at least one heat pump unit (200) and wherein the heat pump frame kit (1) is fluidically connected to the at least one heat pump unit (200).

17. Energy system (400), comprising a hybrid energy transformation device according to claim 16 and a heat pump unit (200).

18. Energy system (400) according to 16, further comprising at least one load circuit (300).

19. Use of the heat pump frame kit (1) and/or boiler frame kit (100) in a hybrid energy transformation device according to claim 16 or in an energy system (400) according to any one of the claims 17 - 18.

20. Method of installation a hybrid energy transformation device (600) according to claim 16, the method comprising a) installing a heat pump frame kit (1) according to any one of the claims 1 - 12 by connecting it to a wall and b) installing a boiler unit (500), in particular a boiler frame kit (100) according to at least one of claims 13 to 15 to the heat pump frame kit (1).

21. Method according to claim 20, wherein the method further comprises removing an existing boiler unit (500) before commencing with a).

22. Method of operation of an energy system (400) according to claims 17 or 18, wherein an operation mode of a heat pump unit (200) and of a boiler unit (500) is selected dependent on an outside air temperature and/or an outlet temperature of a load circuit liquid and/or a threshold value of at least 2,5 COP for the heat pump unit (200).

23. Method according to claim 22, wherein the method further comprises that the heat pump unit (200) and/or the boiler unit (500) is, in particular selectively, selected a) such that in a first operation mode the boiler unit (500) is operated and the heat pump unit (200) is deactivated when the outside air 0 °C, in particular -4 °C, in particular -5 °C, in particular -7°C, in particular -10 °C or less; or b) such that in a first operation mode the heat pump unit (200) is operated and the boiler unit (500) is deactivated or only provides peak load coverage when the outside air temperature is greater than -10 °C, in particular -7 °C , in particular -5 °C, in particular -4 °C, in particular 0 °C and the outlet temperature of the load circuit liquid is less than 55 °C, in particular less than 52 °C, in particular less than 50 °C, in particular less than 45 °C, in particular less than 35 °C; or c) such that in a first operation mode the boiler unit (500) is operated and the heat pump unit (200) is deactivated when the outlet temperature of the load circuit liquid is 35 °C, in particular, 45 °C , in particular 50°C, in particular 53 °C , in particular 55 °C or greater.

24. Method according to claim 22 or claim 23, wherein the method further comprises that the heat pump unit (200) and/or the boiler unit (500) is selected such that a heat load of the heat pump unit (200) is at least 30% at 2 °C outside air temperature and 35 °C outlet temperature of the load circuit liquid.

25. A computer program product comprising programmed instructions for controlling an energy management system (400) according to at least one of claims 17 or 18, characterised in that the programmed instructions, when executed on a processor of a control unit (25) configured for controlling a boiler unit (500) and/or a heat pump unit (200), cause the control unit (25) to carry out the method of any one of claims 22 to 24.