Outdoor energy-storage device

Abstract

The invention relates to an outdoor energy-storage device (40) of a system (2) for the temperature conditioning of interiors (4) of a building (6), in particular for heating, cooling or air conditioning, wherein the outdoor energy-storage device (40) can be set up outside the building (6) and comprises, in a modular design, at least one energy store (14), an air heat exchanger (22) and a device unit (50), wherein the device unit (50) is arranged between the energy store (14) and the air heat exchanger (22) and has an exhaust air connection (56) for exhaust air of the building (6) such that inflowing exhaust air of the building (6) is distributed in the device unit (50), wherein an insulation unit (66) shields the device unit (50) with respect to the environment, and wherein the exhaust air of the building (6) is, after flowing through the device unit (50), guided by means of a fan (80) first to the energy store (14) and then to the air heat exchanger (22) such that heat is recovered in the energy store (14) and in the air heat exchanger (22).

Description

[0001] OUTDOOR ENERGY STORAGE UNIT

[0002] The invention relates to an outdoor energy storage unit for a system for air conditioning the interior of a building. Such an outdoor energy storage unit is arranged outside the building and at least partially submerged in the ground.

[0003] A system for air conditioning the interior of a building may include an energy storage unit for energy transfer and storage with a water heat exchanger in a liquid reservoir. The liquid reservoir is located outside the building, while a heat pump for the water heat exchanger and the building is located inside the building. Other building services components, such as heating and hot water, are also located inside the building. Although the devices are easily accessible and protected inside the building, they require considerable space.

[0004] GB 2 076 139 A shows a heat transfer device with a water heat exchanger in a liquid reservoir as a heat storage medium, to which exhaust air is directed, and an air heat exchanger positioned in the exhaust air stream. Heat pumps are provided for both the water heat exchanger and the air heat exchanger. The heat pump is arranged so that exhaust air flows over it. The air is preheated by the heat pump's motor-compressor unit before contact with the heat storage medium, and then transfers the heat to the heat storage medium.

[0005] DE 10 2020 119 653 B3 relates to a system for air conditioning interior spaces of a building, which are connected via at least one exhaust air duct, wherein one or more interior spaces are provided with an air conditioning unit that has a supply of outside air and delivers fresh air or recirculated air to the interior space(s). The air conditioning unit is connected to a fluid circuit of a heat pump, wherein the exhaust air duct and another fluid circuit of the heat pump are connected to an energy storage device arranged outside the building. The energy storage device is designed for energy transmission and energy storage with a heat exchanger in a liquid reservoir, which is connected via the heat exchanger to the further fluid circuit of the heat pump, wherein the exhaust air is guided into the liquid reservoir via a heat exchanger.

[0006] EP 2 090 838 A2 shows a heat pump system with a water storage tank embedded in the ground as the primary heat source of a heat pump, as well as an auxiliary pump that can be used to feed water from an additional heat reservoir into the water storage tank. When the heat supply in the water storage tank is exhausted, a control device activates the auxiliary pump until at least part of the water in the water storage tank has been replaced.

[0007] GB 2 247 072 A shows an integrated heating or cooling system that uses a heat pump and a phase-change heat storage tank to supply a building with space heating, space cooling, and domestic hot water. A heat exchanger in the exhaust air stream and another attached to the building's wastewater line extract heat from the stale air and greywater, which is transferred to the heat storage tank via an ethylene glycol circuit. This heat is then extracted from the heat storage tank to supply the evaporator in the heat pump when heating is required. A drinking water circuit runs through the condenser, a hot water tank, and, if necessary, a heat exchanger for the air conditioning system. Cooling is achieved via an extension of the ethylene glycol circuit, which leads to a heat exchanger. DE 10 2019 135 681 B4 describes an energy storage tank that is preferably at least partially buried in the ground.It comprises a water heat exchanger and an air heat exchanger arranged above the water heat exchanger. The water heat exchanger is arranged in a liquid reservoir formed on a floor between an inner wall and an outer wall. The inner wall encloses a cavity that is at least partially filled by at least a first container and a second container, the first container and the second container having equal volumes and each forming one pole of a redox flow battery.

[0008] JP 2002-267214 A relates to an air-cooled heat storage air conditioner. A casing contains an exhaust air circulation fan duct, a heat storage air fan duct with a heat storage tank that performs heat exchange with the exhaust air, an air supply fan duct on which an evaporator is provided, an exhaust air fan duct with a condenser provided therein, and a compressor for driving the evaporator, the condenser, and the heat storage tank. The compressor and the circulation exhaust air fan passage are arranged side by side and in parallel, sandwiched between the air supply fan passage and the exhaust air fan passage. The heat storage fan passage is arranged while adjoining the former passages at the ends of the aforementioned air passages in a column-like direction to form the casing.

[0009] The task is to provide a space-saving device for an air conditioning system.

[0010] This object is achieved by an energy storage external unit of a system for temperature conditioning of interior spaces of a building, in particular for heating, cooling or air conditioning, wherein the energy storage external unit can be installed outside the building and comprises, in a modular design, at least one energy storage unit, an air heat exchanger and a device unit, wherein the energy storage unit is designed with a liquid reservoir with a water heat exchanger for energy transmission and energy storage, the air heat exchanger surrounds a radial fan at least in sections around an outer circumference, so that an air flow is created through the air heat exchanger radially from the outside to the inside, which air flow escapes axially upwards at the radial fan, wherein the device unit is arranged between the energy storage unit and the air heat exchanger and has an exhaust air connection for the building's exhaust air, so that incoming exhaust air from the building is distributed in the device unit,and wherein an insulation unit shields the device unit from the environment with thermal insulation, wherein the exhaust air of the building, after flowing through the device unit, is first guided by a fan to the energy storage unit and then to the air heat exchanger, so that heat recovery takes place at least in the energy storage unit and optionally also in the air heat exchanger.

[0011] The energy storage outdoor unit is modularly constructed in the form of individual units, which can be delivered pre-installed and do not require any space inside the building. In order to achieve the goal of a compact design and the lowest possible energy loss in the liquid reservoir, the arrangement of the units is important. According to the invention, all units are stacked on top of each other. In the energy storage unit, the liquid reservoir enables energy to be stored in the liquid. The energy transfer takes place via both the air heat exchanger and the water heat exchanger. The individual functional modules important for the function are then located in the device unit. The exhaust air is the room air removed from the building, the thermal energy of which is passed through the energy storage unit for heat recovery or cold recovery. Previously, it was used for temperature control, i.e.In winter, it heats the functional modules; in summer, it cools the functional modules of the device unit in the energy storage outdoor unit, ensuring safe operation even at low outside temperatures. "Temperature control" therefore encompasses both heating and cooling. The operation of the functional modules in the device unit with cold-sensitive electrical circuits is thus insensitive to cold even at low outside temperatures in winter due to the temperature control of the water pump and the optional additional functional modules via the exhaust air, meaning that no heating is required in the energy storage outdoor unit.

[0012] In an embodiment according to the invention, the device unit has at least one heat pump which is coupled to the water heat exchanger and the air heat exchanger via a connecting plate.

[0013] In contrast to other known systems, in which only the energy storage unit with its liquid reservoir is installed outside the house, other functional modules in the device unit, in particular the heat pump that would otherwise be provided in the building, are relocated outside.

[0014] In a further embodiment of the invention, the appliance unit contains the devices required for the function of the energy storage unit and the air heat exchanger. Furthermore, the appliance unit can have a hot water tank for drinking water or domestic water. Alternatively or additionally, the appliance unit can have an energy buffer, for example in the form of a water tank, which serves to temporarily release energy and supports the function of the heat pump.

[0015] The interior of the device unit forms a space that is decoupled from the outside temperature and heated by the building's exhaust air. The same principle is used to control the temperature of other functional modules, in particular their electrical circuits. The functional module forms a closed functional unit, usually with its own housing within the energy storage external unit. The functional modules are replaceable, which facilitates maintenance and repair. In the electrical circuit, electrical and / or electromechanical components are combined into a functionally appropriate arrangement that, for example, controls the functional module or its interaction with other functional modules, the energy storage system, or other components of the system, which may also be buildings.Electrical circuits are sensitive to cold and are often the limiting factor for the operation of the functional module at low temperatures, so temperature control, especially of the electrical circuits, improves the operational reliability of the entire energy storage outdoor unit.

[0016] In a further embodiment of the invention, the device unit is surrounded on its outside by an insulation unit.

[0017] The device unit with the insulation unit is arranged between the energy storage unit and the air heat exchanger in the form of a highly insulated “warm room”, which can also accommodate the hot water tank for drinking water or domestic water, so that it has only minimal energy losses to the environment.

[0018] In a further embodiment of the invention, the insulation unit spans a floor area to the energy storage device.

[0019] The insulation unit can be reinforced around its circumference with a collar. This is particularly advantageous for an outdoor energy storage unit that is partially buried in the ground, with this collar covering the part of the unit that is buried in the ground. The unit and the air heat exchanger can be provided with side covers above the insulation unit. The air heat exchanger can have a lid.

[0020] The building's exhaust air can enter the unit via a pipe connection, preferably laid underground, on the underside of the unit.

[0021] The building's exhaust air, along with the waste heat from electrical components in the unit, serves to regulate the temperature within the unit. The unit typically contains several functional modules, which are advantageously designed to control heating, cooling, and / or ventilation within the system. The functional modules are arranged so that the exhaust air flows between the functional modules to the energy storage unit, where it regulates the temperature of the functional modules.

[0022] In one embodiment, a fan is installed in the device unit, which guides the exhaust air to the energy storage unit. The fan directs the exhaust air to the energy storage unit. The energy storage unit advantageously has an exhaust-conducting heat exchanger designed to direct the exhaust air over the liquid reservoir before it flows to the air heat exchanger in the energy storage unit. In this way, an energy transfer already takes place between the exhaust air and the liquid in the liquid reservoir before the thermal energy of the exhaust air is utilized in the air heat exchanger.

[0023] In one design, the energy storage outdoor unit comprises a base plate, a cover, and a continuous side wall between the base plate and cover, enclosing the space in which the energy storage unit and the functional modules are housed. The base plate can have a raised edge, resulting in a tub-like shape. The energy storage outdoor unit can be partially installed in the ground, so that only the cover and the upper side wall protrude above the ground. They can be integrated into the design of the outdoor space, for example, by planting plants or creating a garden pond on the cover.

[0024] Below, some examples are explained in more detail using the drawings. They show:

[0025] Figure 1 shows an embodiment of a system for air conditioning the interior of a building,

[0026] Figure 2 is a three-dimensional exploded view of an embodiment of an outdoor energy storage device,

[0027] Figure 3 shows a three-dimensional view of the interior of the energy storage external unit,

[0028] Figure 4 is a three-dimensional view of the device unit of the energy storage outdoor unit, and

[0029] Figure 5 shows another three-dimensional view of the interior of the energy storage external unit.

[0030] In the figures, identical or functionally equivalent components are provided with the same reference numerals.

[0031] Figure 1 shows an exemplary embodiment of a system 2 for air conditioning interior spaces 4 of a building 6. The building 6 can be, for example, a residential building or an office building. However, such a system 2 can be applied to various building types. The example shown should therefore be considered non-limiting. Each of the interior spaces 4 is connected via an exhaust air opening 8 to an exhaust air duct 10, which discharges exhaust air from the interior spaces 4.

[0032] An outdoor energy storage unit 40 is arranged outside the building 6, for example in the garden or on the outdoor area. The outdoor energy storage unit 40 is at least partially submerged in the ground 30, so that only the upper region of the outdoor energy storage unit 40 protrudes from the ground 30. The outdoor energy storage unit 40 has an energy storage unit 14 with a water heat exchanger 18 in a liquid reservoir 16 and an air heat exchanger 22 above the liquid reservoir 16. The outdoor energy storage unit 40 further has a device unit 50 with a heat pump 52 as a functional module of the device unit 50, which is coupled to the water heat exchanger 18 and the air heat exchanger 22. The device unit 50 further comprises a hot water tank 54 for drinking and / or service water, from which drinking and / or service water can be provided for the building 6.

[0033] Building 6 is equipped with a transfer point 12 that connects building 6 to the energy storage outdoor unit 40 via a connection 42. For this purpose, connection 42 can include, for example, a supply line for exhaust air from building 6, an electrical connection, drinking or domestic water supply lines, or even fluid lines for the heat pump 52, which are required for the function of the energy storage outdoor unit 40 or which are to be led back into the building in order to fulfill the temperature conditioning of the interior spaces 4 of building 6 for heating, cooling, or air conditioning, as well as for hot water supply. The illustrated coupling between building 6 and the energy storage outdoor unit 40 by means of transfer point 12 and connection 42 to the energy storage outdoor unit 40 is to be understood as an example only.Of course, individual lines can also be routed in separate supply ducts or combined in another way between the building 6 and the energy storage external unit 40 or can penetrate the building 6 at several points other than just the transfer point 12.

[0034] The exhaust air duct 10 is coupled to the energy storage unit 14 and the heat pump 52, so that the incoming exhaust air is distributed in the device unit 50 before the exhaust air flows into the energy storage unit 14.

[0035] Located in the liquid reservoir 16 of the energy storage unit 14 is the water heat exchanger 18, which comprises a plurality of tubes connected to the heat pump 52 via a fluid circuit. A heat transfer medium flows through the tubes, dissipating heat or cold transferred from the liquid in the liquid reservoir 16. Typically, the liquid reservoir 16 is filled with water or a paraffin compound.

[0036] Above the liquid reservoir 16, above an insulation layer 20, is an air heat exchanger 22. The air heat exchanger 22 is arranged in several segments around a central region 24 of the energy storage device 14. A heat exchanger 44 with flow guides is arranged below the insulation layer 20. The heat exchanger 44 is designed so that an air flow is directed over the liquid in the liquid reservoir 16 before the air flows onto the air heat exchanger 22 in the energy storage device 14. As a result, the energy contained in the air flow is first supplied to the liquid reservoir 16. The heat exchanger 44 directs the air radially outward over the liquid. The air is then guided radially from the outside through the air heat exchanger 22.Located in the central area 24 is a radial fan, which draws air from the air heat exchanger 22, along with air flowing in radially from outside, toward the central area 24, where the air then leaves the energy storage unit 14. The heat pump 52 is connected to the fluid circuit of the water heat exchanger 18. The heat pump 52 is also connected to a fluid circuit of the air heat exchanger 22, which comprises a plurality of tubes. A heat transfer medium flows through the tubes, removing heat or cold from the air flowing past the tubes. Pumping devices can be provided in the heat pump 52 for the water heat exchanger 18 and the air heat exchanger 22.A fluid circuit 32 in the building 6 is coupled to the energy storage external unit 40 via the connection 42, so that the heat pump 52 is connected to an air conditioning unit 34, which, in addition to the connection to the further fluid circuit 32, has a supply of outside air via an opening 36 by means of the supply line 38.

[0037] A pump coupled to the hot water tank 54 for drinking and / or domestic water can be provided as a further module. It is designed to pump drinking and / or domestic water from the hot water tank 54 for drinking and / or domestic water into building 6. For this purpose, a drinking and / or domestic water connection is provided on the energy storage external unit 40, which is connected to a hot water pipe leading into building 6.

[0038] Figure 2 shows a three-dimensional view of an embodiment of an energy storage outdoor unit 40. In addition to the features already explained above in connection with Figure 1, an exhaust air connection 56 can also be seen, which is laid underground within the ground 30 and supplies the exhaust air from the building 6 to the energy storage outdoor unit 40 in the area of ​​the device unit 50.

[0039] It can also be seen that the liquid reservoir 16 is surrounded by soil 30, whereby the air heat exchanger and parts of the device unit can be arranged above the soil 30, whereby these components are protected from environmental influences by side covers 58 and a lid 60. In the lid 60, an opening can be seen in the central region 24 through which the air passed through the air heat exchanger leaves the energy storage outdoor unit 40. The side covers 58 give the energy storage outdoor unit 40 a visually appealing appearance, so that it blends pleasantly into a garden plot or other visible area of ​​land, for example. The lid 60 can also be planted or filled with water, so that a bed or garden pond can be formed on top of the energy storage outdoor unit 40. It is also possible to fill the trough-shaped lid with decorative sand or gravel.

[0040] Located beneath the side covers 58 is a thermal insulation 62, which is reinforced, particularly in the area of ​​the ground 30, by an additional collar 64 with thermally insulating properties. The thermal insulation 62 and the collar 64 form an insulation unit 66 for thermal insulation, particularly of the device unit 50.

[0041] Figure 3 shows a three-dimensional view of the interior of the energy storage external unit 40 without elements that obstruct the view into the interior, such as the side covers 58, the lid 60 or the casing of the liquid reservoir 16.

[0042] It can be seen that a radial fan 70 is provided above the air heat exchanger 22 for discharging the air flowing through the air heat exchanger 22. The air heat exchanger 22, together with the radial fan 70, is designed as a modular unit that is mounted on the device unit 50. The device unit 50, in turn, is surrounded by the insulation unit 66. The insulation unit 66 extends beyond the thermal insulation 62 and the collar 64 into removable side panels 68, which surround the warm area within the device unit 50 as vacuum insulation. The removable side panels 68 allow access to the interior of the device unit 50 from all four directions.

[0043] The energy storage unit is arranged below the device unit 50, also in a modular design, whereby in the illustration shown only a support structure 72 can be seen, which supports the water heat exchanger 18 and the casing surrounding the liquid reservoir 16. Due to its modular design, the energy storage external unit 40 can be installed particularly flexibly and cost-effectively, whereby individual properties in the temperature control of the building 6 can be taken into account by selecting the functional modules provided in the device unit 50. Thus, the hot water tank 54 can remain unequipped in some installations, for example if the hot water supply to the building 6 is to be implemented in a different way. It is of course possible to integrate additional functional modules into the device unit 50.

[0044] Figure 4 shows a three-dimensional view of the interior of the device unit 50 of the energy storage outdoor unit 40. In addition to the heat pump 52 and hot water tank 54 already described, additional functional modules 74 are arranged in the device unit 50, which can be, for example, system modules for operating the energy storage outdoor unit 40 or an energy buffer in the form of a water tank. The individual modules are connected via a connecting plate 76, which significantly simplifies the laying of the hydraulic lines for connecting to the components of the energy storage outdoor unit 40 and back to building 6. The connecting plate 76 is arranged on a side wall of the device unit 50 in order to achieve the most space-saving design of the device unit 50. As already described above, exhaust air from building 6 is supplied to the device unit 50 via the exhaust air connection 56. In the case of external cold, e.g.In winter, the temperature control by the exhaust air causes the functional modules 74 as well as the components of the heat pump 52 and the hot water tank 54 to be heated, thus increasing their operational reliability and performance. The temperature control effect is supported by the waste heat from the electrical circuits in the individual modules, which also contribute to heating. Heating of the energy storage external unit 40 is not necessary. In outside heat, e.g. in summer, the temperature control causes the individual modules to be cooled, since the cooler exhaust air also dissipates heat from the electrical circuits. The path of the exhaust air through the device unit 50 is described below with reference to Figure 5.

[0045] Figure 5 shows a three-dimensional view of the interior of the energy storage outdoor unit 40 to illustrate the path of the exhaust air.

[0046] A fan 80 is arranged inside the device unit 50 and is mounted on a base plate 82, which separates the device unit 50 from the underlying energy storage unit 14 with its liquid reservoir 16. The exhaust air from building 6 entering through the exhaust air connection 56 is initially distributed inside the device unit 50 in order to temper it, as already described.

[0047] The first part of the air flow of the incoming exhaust air from building 6 is designated by reference numeral 90 in Figure 5. The exhaust air is directed by the fan 80 into a region above the water in the liquid reservoir 16.

[0048] The second part of the air flow is marked with the reference numeral 92.

[0049] There, both the energy of the exhaust air of the building 6 and the heat of the modules within the device unit 50 are transferred to the liquid reservoir 16 via a heat exchanger 44 (see Figure 1 ).

[0050] The third part of the airflow is designated 94 and carries the exhaust air from the device unit 50 to the air heat exchanger 22, which absorbs the remaining energy. The exhaust air is directed directly to the air heat exchanger 22 via an insulated hose (not shown in the figures). Condensate from the heat exchanger, as well as water introduced by precipitation from the openings of the radial fan 70, is also conveyed through this hose downward into the energy storage unit 14. The exhaust air then leaves the energy storage external unit 40 in the central area 24 as exhaust air.

[0051] The energy storage outdoor unit 40 offers many advantages over conventional systems. The energy storage outdoor unit 40 is highly efficient, which is due to the intelligent placement of all components, in particular the hot water tank 54 for drinking and / or domestic water, in the insulation unit 66 designed as a "warm room." The arrangement of the modules 74, the heat pump 52, and, if applicable, the hot water tank 54 in the device unit 50 creates a modular system. The energy storage outdoor unit 40 is characterized by a compact above-ground installation space that requires little outdoor space and can be implemented as a quick and simple underground construction. This results in lower overall costs due to less material and faster assembly.

[0052] Quick and easy assembly as well as optimal accessibility for maintenance and service is also possible, as all technical components are accessible from all four sides.

[0053] The features specified above, those in the claims, and those evident from the illustrations can be advantageously implemented both individually and in various combinations. The invention is not limited to the described embodiments, but can be modified in many ways within the scope of expert knowledge.

[0054] List of reference symbols:

[0055] 2 systems

[0056] 4 interiors

[0057] 6 buildings

[0058] 6 building

[0059] 8 Exhaust air opening

[0060] 10 exhaust air duct

[0061] 12 Transfer point

[0062] 14 energy storage

[0063] 16 Liquid reservoir

[0064] 18 water heat exchangers

[0065] 20 insulation layer

[0066] 22 air heat exchangers

[0067] 24 area

[0068] 30 Soil

[0069] 32 Fluid circuit

[0070] 34 air conditioner

[0071] 36 Opening

[0072] 38 Supply line

[0073] 40 Energy storage outdoor unit

[0074] 42 connection

[0075] 44 heat exchangers

[0076] 50 device unit

[0077] 52 modules

[0078] 52 heat pump

[0079] 54 hot water tanks

[0080] 56 Exhaust air connection

[0081] 58 covers

[0082] 60 Lid 62 Thermal insulation

[0083] 64 collars

[0084] 66 Isolation Unit

[0085] 68 Side panel 70 Radial fan

[0086] 72 stud frame

[0087] 74 functional modules

[0088] 76 Connecting plate

[0089] 80 Fan 82 Base plate

[0090] 90 airflow

[0091] 92 Airflow

[0092] 94 Airflow

Claims

Claims:

1. An external energy storage unit (40) of a system (2) for temperature conditioning of interior spaces (4) of a building (6), in particular for heating, cooling, or air conditioning, wherein the external energy storage unit (40) can be installed outside the building (6) and comprises, in a modular design, at least one energy storage unit (14), one air heat exchanger (22), and one device unit (50), wherein the energy storage unit (14) is designed with a liquid reservoir (16) with a water heat exchanger (18) for energy transmission and energy storage, the air heat exchanger (22) surrounds a radial fan (70) at least in sections around an outer circumference, so that an air flow through the air heat exchanger (22) is created radially from the outside to the inside, which air flow escapes axially upwards at the radial fan (70), wherein the device unit (50) is arranged between the energy storage unit (14) and the air heat exchanger (22), and has an exhaust air connection (56) for exhaust air from the building (6),so that incoming exhaust air from the building (6) is distributed in the device unit (50), and wherein an insulation unit (66) shields the device unit (50) from the environment, wherein the exhaust air from the building (6), after flowing through the device unit (50), is first guided by a fan (80) to the energy storage unit (14) and then to the air heat exchanger (22), so that heat recovery takes place at least in the energy storage unit (14).

2. Energy storage outdoor unit (40) according to claim 1, wherein the device unit (50) has at least one heat pump (52) which is coupled to the water heat exchanger (18) and the air heat exchanger (22) via a connecting plate (76).

3. Energy storage external device (40) according to claim 1 or 2, wherein the device unit (50) has the functions required for the function in the energy storage device (14) and the Contains the devices required for the air heat exchanger (22) and further comprises a hot water storage tank (54) for drinking water or service water or an energy buffer, in particular in the form of a water storage tank.

4. Energy storage external device (40) according to one of claims 1 to 3, wherein the device unit (50) is surrounded on an outer side by the insulation unit (62, 62', 68).

5. The energy storage external unit (40) according to claim 4 or 5, wherein the insulation unit (66) spans a portion of the base plate (82) to the energy storage unit (14).

6. Energy storage external device (40) according to claim 4 or 5, wherein the insulation unit (66) is reinforced circumferentially by means of a collar (64).

7. The outdoor energy storage device (40) according to claim 6, which is partially sunk into a soil (30), wherein the collar (64) covers the part of the device unit (50) sunk into the soil (30).

8. Energy storage outdoor unit (40) according to one of the preceding claims, in which the device unit (50) is of modular construction, the interior of the device unit forming a space decoupled from the outside temperature and heated by the exhaust air of the building.

9. Energy storage outdoor unit (40) according to one of the preceding claims, wherein the device unit (50) and the air heat exchanger (22) above the insulation unit are provided with side covers (58) and the air heat exchanger (22) is provided with a cover (60).

10. Energy storage external unit (40) according to one of the preceding claims, in which the exhaust air of the building (6) enters the device unit (50) via a pipe connection (56) preferably laid in the ground (30) on the edge-side underside.

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