WO2024240331A1

WO2024240331A1 - Heat pump coupling frame kit with an aligned connector set

Info

Publication number: WO2024240331A1
Application number: PCT/EP2023/063644
Authority: WO
Inventors: Jörg MARCH
Original assignee: BDR Thermea Group BV
Current assignee: BDR Thermea Group BV
Priority date: 2023-05-22
Filing date: 2023-05-22
Publication date: 2024-11-28
Anticipated expiration: 2025-11-22

Abstract

The invention relates to a heat pump coupling frame kit (1) for a hybrid energy transformation device (600), the heat pump coupling frame kit (1) comprising a frame (2) for connecting the heat pump coupling frame kit (1) to a wall and to a boiler unit (500), in particular a boiler frame kit (100), and a distributor (10) arranged within a volume delimited by the frame (2), in particular connected to the frame (2), wherein the distributor (10) comprises at least one load connector (17) of a connector set, fluidically connecting a cavity of the distributor (10) with at least one load circuit (30) of an energy system (400), wherein the at least one load connector (17) is configured to be coaxially connected to a corresponding connector (28) of a corresponding connector set of the load circuit (30) in case the distributor (10) is fluidically connected to the load circuit (30).

Description

HEAT PUMP COUPLING FRAME KIT WITH AN ALIGNED CONNECTOR SET

The invention relates to a heat pump coupling 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 coupling 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, which are easy to transport and install such a compact system. 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 energy-efficient heating modes depending on the internal heating demand, energy prices and out-door temperatures. A disadvantage of such known complete hybrid heat pump systems is that the heat pump is directly connected to the central heating load circuit, this leads to highly fluctuating volume flow during operation, which can reduce the service life of a heat pump. In addition, the thermostatic radiator valves are constantly active during operation, which changes the volume flow constantly. In addition, the heater valves can be opened and closed manually, which also leads to changes in the volume flow. Also these volume flow changes lead to reduced service life of a heat pump.

Commonly known hybrid heat pumps including complete hybrid heat pump products have the further disadvantage that the installation requires an installer who is trained on refrigeration system mechatronics including the required certifications. As part of the energy transition requirements and regulations, a large number of replacement and upgrading of existing installations is expected, which leads to a need that also installers who are trained in boiler installations, only, need to be able to upgrade or replace an existing boiler installation without the need for refrigeration system mechatronic training and certification.

The object of the invention is therefore, to facilitate the constructively easy, fast, error- reduced and safe installation and connection of hybrid heat pump systems and of their components wherein the installation and connection does not require specific refrigeration system training of the installer and wherein recirculation in the hybrid energy transfer system is reduced or avoided in a constructively simple manner, optimally changes in the negative impact of volume flow within the central heating load circuit on the service life of the hybrid heat pump system is reduced, preferably avoided.

The object is solved by a heat pump coupling frame kit for a hybrid energy transformation device, the heat pump coupling frame kit comprising a frame for connecting the heat pump coupling frame kit to a wall and to a boiler unit, in particular a boiler frame kit as described below, and a distributor arranged within a volume delimited by the frame, in particular connected to the frame, wherein the distributor comprises at least two receiving portions for at least two load connectors of a connector set, fluidically connecting a cavity of the distributor with at least one load circuit of an energy system, wherein the at least one load connector is configured to be coaxially connected to a corresponding connector of a corresponding connector set of the load circuit in case the distributor is fluidically connected to the load circuit and wherein the frame comprises at least two corresponding receiving portions.

The receiving portions of the at least two load connectors and/or of the frame preferably have a central axis, more preferably the receiving portions have a rotationally symmetric shape, even more preferably the receiving portions have a round or circular shape.

In an embodiment, the distributor can have a rectangular shape or a cylindrical shape. The distributor has a geodetical bottom and a geodetical top, defined in mounting position of the of a hybrid energy transformation device. The heat pump coupling frame kit is to be connected to the wall and the boiler unit is to be connected to the heat pump coupling frame kit such that the heat pump coupling frame kit is in between the wall and the boiler unit.

The heat pump coupling 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 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.

In addition, the heat pump coupling unit according to the invention allows for the decoupling of the volume flow to the heat pump and to the central heating load circuit. Thus, the heat pump coupling 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 installation and connection does not require specific refrigeration system training of the installer and in addition, the heat pump coupling frame kit ensures that changes in the negative impact of volume flow within the central heating load circuit on the service life of the hybrid heat pump system is reduced, preferably avoided. The heat pump coupling 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 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 coupling 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 installation and connection does not require specific refrigeration system training of the installer and in addition, the heat pump coupling frame kit ensures that changes in the negative impact of volume flow within the central heating load circuit on the service life of the hybrid heat pump system is reduced, preferably avoided. 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.

The heat pump coupling frame kit according to the invention further allows for the decoupling of the volume flow to the heat pump and to the central heating load circuit by provision of the distributor. The heat pump coupling frame kit according to the invention thereby reduces or even avoids the negative impact of volume flow fluctuation within the central heating load circuit on the service life of the energy system. The heat pump coupling frame kit according to the invention can further be installed by an installer without requiring a specific refrigeration system training.

The heat pump coupling frame kit can be fluidically connected to a heat pump unit. The heat pump unit can be a monobloc heat pump, in particular an outdoor unit of a heat pump. Further the heat pump can be an air source heat pump or ground source heat pump.

Another advantage of the heat pump coupling frame kit to an existing heat pump unit and/or boiler unit in an existing installation is constructively easy and safe and does not require additional training and can be connected by an installer trained for boiler installation.

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 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, connector 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 corresponding connector is part of a pipe that is attached to the wall of the housing.

According to an embodiment, the receiving portions of the distributor can be provided in the geodetical bottom of the distributor.

According to an embodiment the receiving portion of the frame can be provided in the geodetical bottom of the frame. The frame has a geodetical bottom and a geodetical top, which is defined in mounting position of the hybrid energy transformation device.

According to an embodiment the receiving portions of the distributor are concentric with the receiving portions of the frame. According to an embodiment the receiving portions of the distributor and the receiving portions of the frame are concentric to the main axis of the corresponding connector of the corresponding connector set of the load circuit in case the distributor is fluidically connected to the load circuit.

According to an embodiment at least one further receiving portion is provided in the geodetical top of the distributor, wherein the receiving portion is concentric to one receiving portion of the distributor provided in the geodetical bottom of the distributor.

According to an embodiment the heat pump frame kit comprises a flow pipe, wherein one load connector is fluidically connected to the flow pipe.

In case one load connector, in particular for central heating, is fluidically connected to the flow pipe, the fluidical connection can be provided via a switch valve in a further embodiment. The connection of the load connector is preferably provided via a receiving portion in the geodetical bottom of the frame, the receiving portion in the geodetical bottom of the distributor and the receiving portion in the geodetical top of the distributor. The respective receiving portions in the frame, the bottom and in the top of the distributor are concentric to each other and are concentric to the main axis of the corresponding connector of the corresponding connector set of the load circuit, in particular for central heating, in case the distributor is fluidically connected to the load circuit.

According to an embodiment the distributor further comprises at least two receiving portions for at least two load connectors of a connector set, in particular for domestic hot water, fluidically connecting a cavity of the distributor with at least one load circuit, in particular for domestic hot water, of an energy system, wherein the at least one load connector is configured to be coaxially connected to a corresponding connector of a corresponding connector set of the load circuit in case the distributor is fluidically connected to the load circuit and wherein the frame comprises at least two corresponding receiving portions.

According to an embodiment one load connector is fluidically connected to the flow pipe.

In case one load connector, in particular for domestic hot water, is fluidically connected to the flow pipe, the fluidical connection can be provided via the switch valve, in a further embodiment. The connection of the load connector is preferably provided via a receiving portion in the geodetical bottom of the frame, the receiving portion in the geodetical bottom of the distributor and the receiving portion in the geodetical top of the distributor. The respective receiving portions in the frame, the bottom and in the top of the distributor are concentric to each other and are concentric to the main axis C of the corresponding connector of the corresponding connector set of the load circuit, in particular for domestic hot water, in case the distributor is fluidically connected to the load circuit.

The receiving portions of the at least two load connectors, in particular for domestic hot water, and/or of the frame preferably have a central axis, more preferably the receiving portions have a rotationally symmetric shape, even more preferably the receiving portions have a round or circular shape.

According to an embodiment the corresponding connector of the corresponding connector set comprises or is a shut-off valve.

According to an embodiment the at least one load connector set is fluidically connected to the corresponding connector set of the load circuit without intermediate piping.

According to an embodiment the frame comprises at least one back panel which is configured to be positioned against the wall, where the distance between the back panel and the centre of a first and second connector of the at least one load connector set is in the range of 45 - 55 mm, preferably 50mm.

According to an embodiment the centre of a first and second connector of the at least one load connector set are at a mutual distance in the range of 120 - 140 mm, preferably 130 mm.

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 coupling 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 45 - 55 mm, for instance 50 mm. The mutual distance may be in the range of 120 - 140 mm, for instance 130 mm.

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 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 (first inner space of 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 (first inner space of the) distributor is also fluidly connected to the one or more load circuits to discharge water received from the heat pump unit and the boiler unit to the one or more load circuits. The (second inner space of the) distributor is also fluidly connected to the one or more load circuits to receive water from the one or more load circuits that is to be distributed to the heat pump unit and the boiler unit for heating or cooling (the latter only with respect to the heat pump unit). The (second inner space of the) distributor is also fluidly connected to the heat pump unit and the boiler unit to distribute water received from the one or more load circuits to the heat pump unit and the boiler unit to be heated or cooled, the latter only with respect to the heat pump unit. The terms first and second inner space are defined below.

According to an embodiment the distributor comprises a separation wall separating the cavity in a first inner space and a second inner space. The separation wall separates the liquid flowing from the boiler unit and heat pump unit into the first inner space from the liquid flowing from the at least one load circuit into the second inner space. Thus, it can be prevented that the inflowing liquids having different temperatures mix resulting in a lower efficiency of the energy system.

The first inner space may be above the second inner space. The first and second inner spaces are within the distributor. The first inner space may be configured to comprise warm water received from the heat pump unit and/or boiler unit. The second inner space may be configured to comprise cold water received from the one or more load circuits of the energy system.

According to an embodiment the distributor has a connection line fluidically connecting the first inner space and the second inner space. This prevents a short circuit in the distributor. Water coming from the heat pump unit enters the first inner space, then via the connection line to the second inner space and from there, back to the heat pump unit. Water that flows in, must also flow out. Depending on the requirements, part of the water flows towards the one or more load circuits, to also end up in the second inner space. The mass flows are independent.

The connection line may be connected to any connection set comprising at least one connector having an open end in the first inner space and/or at least one other connector having an open end in the second inner space.

According to an embodiment the distributor comprises at least one heat pump connector set for a heat pump unit. By providing more than one heat pump connector set, the installer may select the heat pump connector set that is best accessible in the given situation. In particular, the installer can use the connector set that can be easier connected to the lines that fluidically connect the distributer to the heat pump unit. Also, the non-used heat pump connector set may be used to connect the connection line fluidically connecting the first inner space and the second inner space as mentioned above.

According to an embodiment the distributor comprises a first heat pump connector set and a second heat pump connecting set, wherein the first heat pump connector set and the second heat pump connector set are positioned at opposite sides of the distributor.

The opposite sides are opposite in horizontal direction, when the heat pump coupling frame kit is in its normal operation orientation. The first heat pump connector set may be positioned on the left, and the second heat pump connector set may be positioned right, when seen in a direction perpendicular to the wall to which the heat pump coupling frame kit is to be connected.

According to an embodiment the distributor comprises a boiler connector set for a boiler unit.

According to an embodiment the distributor comprises at least one load connector set arranged coaxially to a corresponding connector set of a load circuit. The at least one load connector of a first load connector set connects the cavity of the distributor fluidically with at least one load circuit of an energy system for example a central heating circuit. The at least one connector is configured to be coaxially connected to a corresponding connector of a corresponding connector set of the load circuit in case the distributor is fluidically connected to the load circuit. The corresponding connector of the corresponding connector set comprises or is a shut-off valve. The boiler connector set for connecting the distributor to the boiler unit may be positioned centrally in the distributor.

According to an embodiment each connector set comprises a first connector to the first inner space and a second connector to the second inner space.

This applies to all connector sets, including the load connector set(s), as well as to the heat pump and boiler connector sets.

According to an embodiment the heat pump coupling frame kit comprises a flow pipe fluidically connected to the first inner space.

Assuming the energy system is used for heating purposes, the flow pipe is connected to the first inner space and configured to receive warm water from the first inner space and transport the warm water to the at least one load circuit(s). Said flow pipe can be arranged in an inner space of the heat pump coupling frame kit. The inner space is delimited by panels of the heat pump coupling frame kit.

According to an embodiment the flow pipe extends along a central body axis of the heat pump coupling frame kit.

The central body axis may be a vertical central body axis, where the term vertical is used to refer to the normal operation or installation position and orientation of the heat pump coupling frame kit. By providing the flow pipe centrally, the flow pipe is reachable from different sides. In use, the heat pump coupling frame kit is positioned in between the wall and the boiler unit, so the heat pump coupling frame kit can easiest be maintained from the sides. By providing the flow pipe centrally, it is accessible from both sides. The flow pipe may run in upward direction from the distributor. The flow pipe may be perpendicular to the distributor, connected to the upper side of the distributor. The term upper side is used to the normal operation orientation of the heat pump coupling frame kit.

According to an embodiment the flow pipe is fluidically connected with a pump and/or a deaerator.

Assuming the energy system is used for heating purposes, the pump is provided to pump warm water to the at least one load circuit. The deaerator is provided to allow entrapped air to escape, thereby preventing air to reach the pump and/or the load circuits. Preferably the deaerator is provided upstream with respect to the pump. A deaerator is a device that is used for the removal of air and other dissolved gases from water.

The pump may be positioned between the central body axis or flow pipe and a first side panel of the heat pump coupling frame kit or between the central body axis or flow pipe and a second side panel of the heat pump coupling frame kit. The installer has the choice to position the pump on either side, depending on which side is best accessible for installation and maintenance. This may depend on the geometry of the installation room in which the heat pump coupling frame kit is installed and the exact position of the heat pump coupling frame kit in the installation room.

According to an embodiment wherein the heat pump coupling frame kit comprises a switch valve, fluidly connected to the flow pipe, the switch valve configured to divide the water over two or more load circuits.

The switch valve is preferably positioned downstream of the pump. The switch valve is with an inlet side fluidly connected to the flow pipe via the pump (and the deaerator if present) and with an outlet side to two or more load circuits. A switch valve actuator may be provided to actuate the switch valve to divide the water as desired. The switch valve may be configured to send a first portion of the water to a first load circuit and a second, remaining, portion of the water to a second load circuit. Alternatively, the switch valve can be configured such that the water flows only into one load circuit.

According to an embodiment the heat pump coupling 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 coupling frame kit to shield the interior of the heat pump coupling frame kit comprising the distributor and other components, like the deaerator, the pump, the flow 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 coupling panel. The side panels refer to the sides of the heat pump coupling 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 coupling 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 coupling frame kit and are configured to be opened or removed from the heat pump coupling frame kit in a maintenance state.

In the operational state the side panels cover the inside of the heat pump coupling kit and close off the inside of the heat pump coupling kit to prevent accidental access of bypassers or dust. The side panels can be removed or opened to provide access to the inside of the heat pump coupling frame kit. This allows maintenance personnel to access the heat pump coupling 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.

According to an embodiment the heat pump coupling 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 coupling frame kit. The control unit may preferably be arranged in a receiving portion of the heat pump coupling frame kit. The receiving portion can in particular comprise a mounting fixture for the control unit. The control unit may be configured to control the switch valve of the heat pump coupling frame kit, the heat pump unit and/or the boiler unit to which the heat pump coupling frame kit may be connected. The control unit comprises one or more processors or can 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 control unit, wirelessly or via electric lines.

According to an embodiment the heat pump coupling frame kit comprises a receiving portion in which selectively an expansion vessel or a control unit can be arranged. The expansion vessel may preferably be arranged in a receiving portion of the heat pump coupling frame kit. The receiving portion can in particular comprise a mounting fixture for the 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.

In case the control unit is selected to be arranged in the receiving portion of the heat pump coupling 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 coupling 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 coupling frame kit. The control unit may be configured to control the switch valve. The control unit may be configured to control the heat pump unit and/or the boiler unit to which the heat pump coupling 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 heat pump coupling 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 coupling frame kit. In other words, the frame of the heat pump coupling 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 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 coupling 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 boiler frame kit is configured to be attached to the heat pump coupling 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 coupling frame kit.

According to an embodiment the boiler frame kit comprises a mounting fixture for a control unit, in particular for fixing the control unit to the frame of the boiler frame kit.

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

According to an embodiment the boiler frame kit comprises a control panel, which is configured to or configurable to communicate with the at least one control unit. In case the control unit is selected to be arranged in the receiving portion of the heat pump coupling 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 coupling frame kit can be constructively easily optimized to the respective installation needs, requirements and limitations.

The 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 may comprise recesses for receiving plugs.

According to an aspect there is provided a hybrid energy transformation device comprising a heat pump coupling frame kit as described, further comprising further comprising a boiler unit, in particular a boiler frame kit as described wherein the heat pump coupling frame kit supports the boiler unit, in particular the boiler frame kit. According to an aspect there is provided an energy system, comprising a hybrid energy transformation device as described and a heat pump unit.

The heat pump unit may be a monobloc 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 can comprise more load circuits. The energy system 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 coupling 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 coupling frame kit by connecting it to a wall and b) installing a boiler frame kit or a boiler unit to the heat pump coupling frame kit.

According to an embodiment the method further comprises removing an existing boiler unit before commencing with a).

According to an embodiment the method further comprises fluidically connecting the heat pump coupling frame kit by connecting at least one load connector set of the heat pump coupling frame to a corresponding connector set of a load circuit which is arranged coaxially to the at least one load connector set.

This connection can be made without the need to adjust the position of the at least one load connector set of the heat pump coupling frame or the corresponding connector set of a load circuit, and without the need for intermediate piping. As intermediate piping it is understood a piping that is fluidically arranged between the load connector of the distributor and the connector of the piping attached to the wall.

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 coupling 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 coupling 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 coupling 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 coupling frame kit. The mounting fixture can be a mounting bracket as described. In other words, the frame of the heat pump coupling 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 coupling 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 coupling frame kit. The heat pump coupling frame kit comprises least one load connector of a distributor of a connector set which is fluidically connecting a cavity of the distributor with at least one load circuit of an energy system. The at least one load connector is configured to be coaxially 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. This can in other words be described as a pin-to-pin fit of connection geometry of the existing connector set of the previous boiler unit installation. The frame 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 coupling frame kit can be screwed to the wall, for example by means of key screws.

Optional Right /Left Execution

Depending on the conditions on site (niches, walls, fixtures, closets, etc.), a pump and a switch valve of the heat pump coupling frame kit may not be accessible in the frame of the heat pump coupling 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 coupling frame kit according to the invention can be easily removed. For example, in case of a niche installation, a removable right-hand side panel could be of no use, because the pump and the switch valve would not be accessible due to the niche installation. In order to be able to adapt the installation constructively easily to the specific conditions on site, the pump and switch valve positioning can be converted on site from a right-hand version to a left-hand version. The conversion is achieved by way of the positioning the pump and the switch valve of the heat pump coupling frame kit on a flow pipe of the heat pump coupling frame kit. The flow pipe is positioned centrally, along a central body axis B, such that the pump, the switch valve and a switch valve actuator can be positioned during the installation on the left of the flow pipe. In this example, the components are accessible from the left for maintenance and servicing in the niche installation blocking the righthand side panel.

Depending on the installation location of the heat pump outdoor unit or site conditions, the connectors are available in right-hand or left-hand version. This provides even greater flexibility during installation.

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 coupling 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 coupling frame kit. The mounting fixture can for example provided as a mounting bracket, configured to be arranged on the frame of the heat pump coupling 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 coupling 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 coupling 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.

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. Additionally or 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. Additionally or 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 , 2 schematically show a heat pump coupling frame kit according to an embodiment,

Figure 3 schematically shows a hybrid energy transformation device according to an embodiment,

Figures 4, 5 schematically show more detailed views of part of a heat pump coupling frame kit according to an embodiment,

Figure 6 schematically shows an energy system according to an embodiment and first and second installation implementation,

Figures 7a, b schematically show a heat pump coupling frame kit according to different embodiments,

Figure 8 schematically shows a complete hybrid heat pump product according to the prior art, and

Figure 9. schematically shows a mounting bracket for mounting a boiler unit according to an embodiment. Figures 1 and 2 schematically show a heat pump coupling frame kit 1. In Fig. 1 the heat pump coupling frame kit 1 is shown with the side panels removed for better visibility. The side panels are in position in Fig. 2.

The heat pump coupling 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 coupling frame kit 1 to the wall with screws, hooks, nails or the like.

The frame 2 further comprises a top panel 4 and two support panels 5 to support the top panel 4 and connect it to the back panels 3. Further provided are two side panels 6. The support panels 5 further are a mounting fixture 34 for a boiler. The mounting fixture 34 in this embodiment comprises two protruding sheet metal strips 35 on the top right and on the top left (in installation position), respectively. The mounting fixture 34 is designed such, that the out-out in a rear panel of a boiler unit 500, in particular a boiler frame kit 100 (not shown), can be accommodated and the weight of the boiler unit 500, in particular the boiler frame kit 100, is introduced into the frame 2. 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).

The side panels 6 can comprise at least one of steel, aluminium, a polymeric, in particular a thermoplastic martial, and a composite material or can be made of steel, aluminium, a polymeric, in particular a thermoplastic martial, 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 coupling 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 coupling 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 coupling 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 frame 2 has a geodetical bottom 44 and a geodetical top 51 , which is defined in mounting position of a hybrid energy transformation device 600.

The frame 2 may further be configured to connect to a boiler unit 500. When installed, the heat pump coupling frame kit 1 is positioned in between the wall and the boiler unit 500. Fig. 3 shows the boiler 100 in position attached to the wall.

The heat pump coupling frame kit 1 further comprises a distributor 10 which 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 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 distributor 10 is more clearly depicted in Fig.’s 4 and 5. The distributor 10 comprises a first inner space 11 and a second inner space 12. The distributor 10 may have a block shape or rectangular shape or any other suitable shape, such as a cylindrical shape. The distributor 10 may comprise a cavity in which a separation wall 13 is provided to divide the cavity in the first and second inner spaces 11 , 12. In heating mode, the first inner space 11 is used to receive warm water from the heat pump unit 200 and/or the boiler unit 500 and discharge water to the one or more load circuits 300. The second inner space 12 is used to receive water back from the one or more load circuits 300 and discharge water back to the heat pump unit 200 and/or the boiler unit 500. The distributor has a geodetical bottom 43 and a geodetical top 46, defined in mounting position of the of the hybrid energy transformation device 600.

The distributor 10 comprises at least two receiving portions 41 for at least two load connectors 17. In the figures, a plurality of connector sets is shown, each connector set comprising a first connector to the first inner space 11 and a second connector 12 to the second inner space are shown. Some connector sets may be provided below the second inner space 12, preferably at the bottom of the heat pump coupling frame kit 1 . This may be the case for the heat pump connector set and the boiler connector set, which will be described in more detail below. The first connectors of these connecting sets may therefore be connected to the first inner space 11 by a connection running through the second inner space 12. The receiving portions 41 of the distributor 10 are provided in the geodetical bottom 43 of the distributor 10. The frame 2 comprises at least two corresponding receiving portions 42. The at least two corresponding receiving portions

42 are provided in the geodetical bottom 44 of the frame 2.

The receiving portions 42 of the distributor 10 are concentric with the receiving portions 44 of the frame 2. The receiving portions 41 of the distributor 10 and the receiving portions 42 of the frame 2 are in particular concentric to the main axis C of the corresponding connector 28 of the corresponding connector set 17 of the load circuit 30 in case the distributor 10 is fluidically connected to the load circuit 30.

The distributor 10 further comprises at least one further receiving portion 45 in the geodetical top 46 of the distributor 10, wherein the receiving portion 45 is concentric to one receiving portion 41 of the distributor 10 provided in the geodetical bottom 43 of the distributor 10.

The heat pump frame kit 1 comprises a flow pipe 20, wherein one load connector 17 is fluidically connected to the flow pipe 20.

The distributor 10 further comprises at least two receiving portions 47 for at least two load connectors 18 of a connector set, fluidically connecting a cavity of the distributor 10 with at least one load circuit 48, in particular for domestic hot water, of an energy system 400, wherein the at least one load connector 18 is configured to be coaxially connected to a corresponding connector 28 of a corresponding connector set 18 of the load circuit 48, in particular for domestic hot water, in case the distributor 10 is fluidically connected to the load circuit 48.

The heat pump coupling frame kit 1 comprises a boiler connector set 15 for connection to a boiler unit 500.

The heat pump coupling frame kit 1 comprises at least one heat pump connector set 14 for connection to a heat pump unit 200. In the embodiment shown, a first heat pump connector set 14 is provided on the left and a second heat pump connector set 14’ is provided on the right. The first heat pump connector set 14 is connected to a heat pump unit 200. The second heat pump connector set 14’ is used for a different purpose, i.e. the connectors of the second heat pump connector set 14’ are mutually connected by a connection line 16, which forms a direct fluidical connection between the first inner space 11 and the second inner space 12. The connection line 16 may be a U-shape connection. The first and second heat pump connector sets may switch roles, depending on which side the heat pump unit 200 is located relative to the heat pump coupling frame kit 1.

The distributor 10 comprises at least one load connector 17 of a first load connector set for fluidically connecting the cavity (i.e. the first and second inner spaces 11 , 12) of the distributor 10 with at least one load circuit of an energy system 400 (e.g. central heating circuit). The at least one connector 17 is configured to be coaxially connected to the corresponding connector 28 of a corresponding connector set of the load circuit in case the distributor 10 is fluidically connected to the load circuit 30. The corresponding connector 28 of the corresponding connector set comprises or is a shut-off valve. The load connector set 17 may be arranged at a standard distance from the wall (or the parts of the heat pump coupling 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 45 - 55 mm, for instance 50 mm. The mutual distance may be in the range of 120 - 140 mm, for instance 130 mm.

The distributor 10 further comprises a second load connector set 18, which may be connected or connectable to a second load circuit of the energy system (e.g. domestic hot water).

Fig. 1 and 2 further show a flow pipe 20, which runs upwards from the distributor 10 to fluidly connect the first inner space 11 of the distributor 10 to an inlet of a pump 22. In between the inner space 11 and the pump 22 there is provided a deaerator 21 to prevent air from reaching the pump 22. The outlet of pump 22 is fluidically connected to a first connector of first load connector set 17 and to a first connector of second load connector set 18. A switch valve 23 may be provided to connect the outlet of pump 22 with both the first and second load circuits. The switch valve 23 may be operated with a switch valve actuator 24 to divide the water from the first inner space 11 over the load circuits. In case one load connector 17 is fluidically connected to the flow pipe 20, the fluidical connection can be provided via the switch valve 23. The connection of the load connector 17 is provided via a receiving portion 42 in the geodetical bottom 44 of the frame 2, the receiving portion 41 in the bottom 43 of the distributor 10 and the receiving portion 45 in the geodetical top 46 of the distributor 10. The receiving portions 41 , 42 and 45 are concentric to each other and are concentric to the main axis C of the corresponding connector 28 of the corresponding connector set 17 of the load circuit 30 in case the distributor 10 is fluidically connected to the load circuit 30.

In case one load connector 18 is fluidically connected to the flow pipe 20, the fluidical connection can be provided via the switch valve 23. The connection of the load connector 18 is provided via a receiving portion 49 in the geodetical bottom 44 of the frame 2, the receiving portion 47 in the bottom 43 of the distributor 10 and the receiving portion 50 in the geodetical top 46 of the distributor 10. The receiving portions 47, 49 and 50 are concentric to each other and are concentric to the main axis C of the corresponding connector 28 of the corresponding connector set 18 of the load circuit 48 in case the distributor 10 is fluidically connected to the load circuit 48.

The flow pipe 20 is positioned centrally, along central body axis B of the heat pump coupling frame kit 1. This allows the pump 22, the switch valve 23 and the switch valve actuator 24 to be positioned on the left (as in Fig. 2) or right (as in Fig. 1) of the flow pipe 20, depending on the circumstances. For instance, in Fig. 3 the heat pump coupling frame kit 1 is attached to a wall, close to a corner. In this situation, it would be more convenient to position the pump 22, the switch valve 23 and the switch valve actuator 24 as shown in Fig. 2, as this allows the pump 22, the switch valve 23 and the switch valve actuator 24 to be reachable for maintenance via the left-side panel 6, where the rightside panel 6 is blocked.

Fig. 6 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 coupling frame kit 1 , a boiler frame kit 100 or a boiler unit 500. The boiler frame kit 100 is configured to be connected to the heat pump coupling frame kit 1 by means of a frame. The boiler frame kit 100 may further comprise a control unit configured for controlling a boiler unit and a heat pump unit. For clarity, the lines through which cold water runs (when used in heating mode) are depicted as dotted lines.

The heat pump coupling frame kit as described above may be used in combination with a heat pump unit 200, being a monobloc heat pump unit 200 in which all the components of a heat pump unit 200 are provided in a single unit: including a compressor, an expansion valve, a source medium-refrigerant heat exchanger and a refrigerantdestination medium heat exchanger. The energy system 400 as shown schematically in Fig. 6 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 36, 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 36, 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 coupling 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 coupling frame kit 1 . The boiler unit 500 can advantageously be installed using the two protruding sheet metal strips 35 of the mounting fixture 34 positioned on the top right and on the top left (in installation position) of the frame 2, respectively. The mounting fixture 34 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. 9. 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 coupling 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 coupling frame kit 1. At least one load connector 17 of a distributor 10 of a connector set is fluidically connecting 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 coaxially connected to a corresponding connector 28, in particular a shut-off valve 36, of a corresponding connector set of the load circuit in case the distributor 10 is fluidically connected to the load circuit 300. This can in other words be described as a pin-to-pin fit of connection geometry of the existing connector set of the previous boiler unit 500 installation. 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.

Optional Right/Left Execution

Depending on the conditions on site (niches, walls, fixtures, closets, etc.), a pump 22 and 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, a removable righthand side panel 6 could be of no use, because the pump 22 and the switch valve 23 would not be accessible due to the niche installation (not shown). In order to be able to adapt the installation constructively easily to the specific conditions on site, the pump 22 and switch valve 23 positioning can be converted on site from a right-hand version to a left-hand version. The conversion is achieved by way of the positioning the pump 22 and the switch valve 23 on a flow pipe 20, which is positioned centrally, along central body axis B, such that the pump 22, the switch valve 23 and also a switch valve actuator 24 can be positioned during the installation on the left (as in Fig. 2) of the flow pipe 20. In this example, the components are accessible from the left for maintenance and servicing in the niche installation blocking the right-hand side panel 6.

Depending on the installation location of the heat pump outdoor unit (not shown) or site conditions, the connectors 17, 18 are available in right-hand or left-hand version. This provides even greater flexibility during installation.

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 coupling 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 34, 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 coupling 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 37. The commissioning of the boiler unit 500, including leak test, flue gas measurement, etc., can be carried out as usual.

Fig.’s 7a schematically depict an embodiment in which the heat pump coupling frame kit 1 comprises a control unit 25.

The control unit 25 may be integrated in the heat pump coupling frame kit 1. The control unit 25 may preferably be arranged in a receiving portion 33 of the heat pump coupling frame kit 1 . The receiving portion 33 can in particular comprise a mounting fixture for the control unit 25. The control unit 25 may be configured to control the switch valve 23, the heat pump unit 200 and/or the boiler unit 500 to which the heat pump coupling frame kit 1 may be connected. The control unit 25 comprises one or more processors or can be a processor. Alternatively, the control unit 25 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 control unit 25, wirelessly or via electric lines (not shown).

Fig. 7b shows an alternative embodiment in which the heat pump coupling frame kit 1 comprises an expansion vessel 26. The expansion vessel 26 may preferably be arranged in a receiving portion 33 of the heat pump coupling frame kit 1. The receiving portion 33 can in particular comprise a mounting fixture for the 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.

Together, Fig.’s 7a and 7b show an embodiment in which the heat pump coupling frame kit 1 comprises a receiving portion in which selectively an expansion vessel 26 or a control unit 25 can be arranged. In case the control unit 25 is selected to be arranged in the receiving portion of the heat pump coupling 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 coupling frame kit 1 can be constructively easily optimized to the respective installation needs, requirements and limitations.

Fig. 8 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 31 of the heat pump unit 900 and a load line 32 of the boiler unit 900 are directly fluidically connected via a T-piece 29 to the load connector to the load circuit for a central heating 30. 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 coupling frame kit

2. Frame

3. Back panel

4. Top panel

5. Support panel

6. Side panel

10. Distributor

11. First inner space

12. Second inner space

13. Separation wall

14., 14’. Heat pump connector set

15. Boiler connector set

16. Connection line

17. Load connector set (heating/cooling)

18. Load connector set (domestic hot water)

20. Flow pipe

21. Deaerator

22. Pump

23. Switch valve

24. Switch valve actuator

25. Control unit

26. Expansion vessel

27. load connector

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

29. T-piece

30. load circuit for a central heating

31. load line (heat pump unit 800)

32. load line (boiler unit 900)

33. receiving space

34. mounting fixture for a boiler

35. sheet metal strips

36. shut-off valve

37. boiler unit control panel

38. mounting fixture for a control unit

40. Mounting bracket 41. Receiving portion of the distributor

42. Receiving portion for a load connector 17 in the frame

43. Geodetical bottom of the distributor

44. Geodetical bottom of the frame

45. Receiving portion for a load connector 17 in the geodetical top of the distributor

46. Geodetical top of the distributor

47. Receiving portion for a load connector 18

48. Load circuit for domestic hot water

49. Receiving portion for a load connector 18 in the frame

50. Receiving portion for a load connector 18 in the geodetical top of the distributor

51. Geodetical top of the frame

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

B. central body axis

C. Main axis of the connector set of the load circuit

Claims

PATENT CLAIMS

1. Heat pump coupling frame kit (1) for a hybrid energy transformation device (600), the heat pump coupling frame kit (1) comprising a frame (2) for connecting the heat pump coupling frame kit (1) to a wall and to a boiler unit (500), in particular a boiler frame kit (100), and a distributor (10) arranged within a volume delimited by the frame (2), in particular connected to the frame (2), wherein the distributor (10) comprises at least two receiving portions (41) for at least two load connectors (17) of a connector set, fluidically connecting a cavity of the distributor (10) with at least one load circuit (30) of an energy system (400), wherein the at least one load connector (17) is configured to be coaxially connected to a corresponding connector (28) of a corresponding connector set of the load circuit (30) in case the distributor (10) is fluidically connected to the load circuit (30) and wherein the frame (2) comprises at least two corresponding receiving portions (42).

2. Heat pump coupling frame kit (1) according to claim 1 , wherein the receiving portions (41) of the distributor (10) are provided in the geodetical bottom (43) of the distributor (10).

3. Heat pump coupling frame kit (1) according to claim 1 or claim 2, wherein the receiving portion (42) of the frame (2) are provided in the geodetical bottom (44) of the frame (2).

4. Heat pump coupling frame kit (1) according to any of the preceding claims, wherein the receiving portions (41) of the distributor (10) are concentric with the receiving portions (42) of the frame (2).

5. Heat pump coupling frame kit (1) according to any of the preceding claims, wherein the receiving portions (41) of the distributor (10) and the receiving portions (42) of the frame (2) are concentric to the main axis (C) of the corresponding connector (28) of the corresponding connector set (17) of the load circuit (30) in case the distributor (10) is fluidically connected to the load circuit (30).

6. Heat pump coupling frame kit (1) according to any of the preceding claims, wherein at least one further receiving portion (45) is provided in the geodetical top (46) of the distributor (10), wherein the receiving portion (45) is concentric to one receiving portion (41) of the distributor (10) provided in the geodetical bottom (43) of the distributor

(10).

7. Heat pump coupling frame kit (1) according to any of the preceding claims, wherein the heat pump frame kit (1) comprises a flow pipe (20), wherein one load connector (17) is fluidically connected to the flow pipe (20).

8. Heat pump coupling frame kit (1) according to any of the preceding claims, wherein the distributor (10) further comprises at least two receiving portions (47) for at least two load connectors (18) of a connector set, in particular for domestic hot water, fluidically connecting a cavity of the distributor (10) with at least one load circuit (48), in particular for domestic hot water, of an energy system (400), wherein the at least one load connector (18) is configured to be coaxially connected to a corresponding connector (28) of a corresponding connector set (18) of the load circuit (48) in case the distributor (10) is fluidically connected to the load circuit (48) and wherein the frame (2) comprises at least two corresponding receiving portions (49).

9. Heat pump coupling frame kit (1) according to claim 8, wherein one load connector (18) is fluidically connected to the flow pipe (20).

10. Heat pump coupling frame kit (1) according to any of the preceding claims, wherein the corresponding connector (28) of the corresponding connector set comprises or is a shut-off valve (36).

11. Heat pump coupling frame kit (1) according to any one of the preceding claims, wherein the at least one load connector set (17) is fluidically connected to the corresponding connector (28) of the corresponding connector set of the load circuit (300) without intermediate piping.

12. Heat pump coupling frame kit (1) according to any one of the preceding claims, wherein the frame (2) comprises at least one back panel (3) which is configured to be positioned against the wall, where the distance between the back panel (3) and the centre of a first and second connector of the at least one load connector set is in the range of 45 - 55 mm, preferably 50mm.

13. Heat pump coupling frame kit (1) according to any one of the preceding claims, wherein the centre of a first and second connector (17) of the at least one load connector set are at a mutual distance in the range of 120 - 140 mm, preferably 130 mm.

14. Heat pump coupling frame kit (1) according to any one of the preceding claims, wherein the distributor (10) comprises a separation wall (13) separating the cavity in a first inner space (11) and a second inner space (12).

15. Heat pump coupling frame kit (1) according to claim 14, wherein the distributor (10) has a connection line (16) fluidically connecting the first inner space (11) and the second inner space (12).

16. Heat pump coupling frame kit (1) according to any one of preceding claims, wherein the distributor (10) comprises at least one heat pump connector set (14) for a heat pump unit (200).

17. Heat pump coupling frame kit (1) according to claim 16, wherein the distributor (10) comprises a first heat pump connector set (14) and a second heat pump connecting set (14’), wherein the first heat pump connector set (14) and the second heat pump connector set (14’) are positioned at opposite sides of the distributor (10).

18. Heat pump coupling frame kit (1) according to any one of the preceding claims, wherein the distributor (10) comprises a boiler connector set (15) for a boiler unit (500), in particular a boiler frame kit (100).

19. Heat pump coupling frame kit (1) according to any one of the preceding claims 6 - 10, wherein each connector set comprises a first connector to the first inner space (11) and a second connector to the second inner space (12).

20. Heat pump coupling frame kit (1) according to any one of the preceding claims, wherein the flow pipe (20) is fluidically connected to the first inner space (11).

21. Heat pump coupling frame kit (1) according to claim 20, wherein the flow pipe (20) extends along a central body axis (B) of the heat pump coupling frame kit (1).

22. Heat pump coupling frame kit (1) according to any one of the claims 20 - 21 , wherein the flow pipe (20) is fluidically connected with a pump (22) and/or a deaerator (21).

23. Heat pump coupling frame kit (1) according to any one of the claims 20 - 22, wherein the heat pump coupling frame kit (1) comprises a switch valve (23), fluidly connected to the flow pipe (20), the switch valve (23) configured to divide the water over two or more load circuits (300).

24. Heat pump coupling frame kit (1) according to claim 23, wherein the switch valve (23) is fluidically connected to one load connector (17).

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

26. Heat pump coupling frame kit (1) according to claim 25, 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.

27. Heat pump coupling frame kit (1) according to any one of the claims 25 - 26, wherein the side panels (6) are configured to be attached to the frame (2) in an operational state of the heat pump frame kit (1) and are configured to be opened or removed from the heat pump frame kit (1) in a maintenance state.

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

29. Heat pump coupling frame kit (1) according to any one of the preceding claims, wherein the heat pump coupling frame kit (1) comprises a receiving portion (33) in which selectively an expansion vessel (26) or a control unit (25) can be arranged.

30. Boiler frame kit (100) for a hybrid energy transformation device (600), comprising o a frame for connecting the boiler frame kit (100) to a heat pump coupling frame kit (1) according to at least one of claims 1 to 29 and o at least one control unit (25) wherein the control unit (25) is configured for controlling a boiler unit (500) and/or a heat pump unit (200).

31. Boiler frame kit (100) according to claim 30, wherein the boiler frame kit (100) comprises a mounting fixture for a control unit (25).

32. Boiler frame kit (100) according to claim 31 , wherein the boiler frame kit (100) comprises a control panel (37), which is configured to or configurable to communicate with the at least one control unit (25).

33. Hybrid energy transformation device (600) comprising a heat pump coupling frame kit (1) according to any one of the claims 1 - 29, further comprising boiler unit (500), in particular a boiler frame kit (100) according to any one of the claims 30 - 32, wherein the heat pump coupling frame kit (1) supports the boiler unit (500), in particular the boiler frame kit (100).

34. Energy system, comprising a hybrid energy transformation device (600) according to claim 33 and a heat pump unit (200).

35. Energy system according to claim 34, further comprising at least one load circuit (300).

36. Use of the heat pump coupling frame kit (1) and/or boiler frame kit (100) in a hybrid energy transformation device (600) according to claim 30 or in an energy system (400) according to any one of the claims 34 - 35.

37. Method of installation a hybrid energy transformation device (600) according to claim 33, the method comprising a) installing a heat pump coupling frame kit (1) according to at least one of claims 1 to 29 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 30 to 32, to the heat pump coupling frame kit (1).

38. Method according to claim 37, wherein the method further comprises removing an existing boiler unit (500) before commencing with a).

39. Method according to any one of the claims 37 or 38, wherein the method comprises fluidically connecting the heat pump coupling frame kit (1) by connecting at least one load connector set (17) of the heat pump coupling frame (1) to a corresponding connector set of a load circuit (300) which is arranged coaxially to the at least one load connector set (17).

40. Method of operation of an energy system according to claims 34 or 35, 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).

41 . Method according to claim 40, 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 temperature 0 °C, in particular -4 °C, in particular -5 °C, in particular -7°C, in particular -10 °C or less; and/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; and/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.

42. Method according to claim 40 or claim 41 , 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.

43. A computer program product comprising programmed instructions for controlling an energy management system (400) according to at least one of claims 34 or 35, 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 40 to 42.