SYSTEM FOR AIR CONDITIONING THE INTERIOR OF A BUILDING

Abstract

In a system for air-conditioning interior spaces of a building which are connected via at least one exhaust air duct, one or more interior spaces are provided with an air-conditioning unit which has a inlet line of outdoor air, which supplies inlet air or circulating air to the interior space or spaces, and which is connected to a fluid circuit of a heat pump. The exhaust air duct and a further fluid circuit of the heat pump are connected to an energy store installed outside the building, wherein the energy store is connected to a heat exchanger in a liquid reservoir for energy transfer and for energy storage, which is connected via the heat exchanger to another fluid circuit of the heat pump, the exhaust air being directed into the liquid reservoir via a heat exchanger.

Claims

1. A system for air-conditioning interior spaces (4) of a building (6), which are connected via at least one exhaust air duct (10), wherein one or more interior spaces (4) are provided with an air-conditioning unit (34), which has a inlet line (38) of outdoor air, which supplies inlet air or circulating air to the interior space or spaces (4), and which is connected to a fluid circuit (32) of a heat pump (30), wherein the exhaust air duct (10) and another fluid circuit (28) of the heat pump are connected to an energy store (14) arranged outside the building (6), wherein the energy store (14) is connected to a heat exchanger (18) in a liquid reservoir (16) for energy transfer and for energy storage, which is connected via the heat exchanger (18) to the further fluid circuit (28) of the heat pump (30), the exhaust air being guided into the fluid reservoir (16) via a heat exchanger (26).

2. The system according to claim 1, in which the exhaust air, after leaving the heat exchanger (18) in the liquid reservoir (16), is led as exhaust air to an air heat exchanger (22) which is also connected to the heat pump (30).

3. The system according to claim 2, in which the exhaust air mixes with outdoor air upstream of the air heat exchanger (22).

4. The system according to claim 2, in which the air heat exchanger (22) is arranged above the liquid reservoir (16) in such a way that a radial, inwardly directed air flow of exhaust air and outdoor air can be induced by the air heat exchanger (22) by means of a fan (48) arranged inside, the air flow leaving the system (2) in a central area (24).

5. The system according to claim 1, in which an outdoor air opening (50) for outdoor air is slot-shaped along the brim of a cover (52) and an air outlet for outdoor air and extract air is preferably designed centrally on the cover.

6. The system according to claim 1, wherein the air conditioning unit (34) is arranged on a ceiling, on a wall or on a parapet wall in the interior.

7. The system according to claim 1, in which the air-conditioning unit (34) is designed as a floor-standing unit.

8. The system according to claim 1, in which the air-conditioning unit (34), when heating is required, heats the outdoor air before it is discharged as supply air into the interior space (4) by means of the fluid circuit (32) of the heat pump (30).

9. The system according claim 1, in which the air-conditioning unit (34), when cooling is required, cools the outdoor air by means of the fluid circuit (32) of the heat pump (30) before supplying it as inlet air into the interior space (4).

10. The system according to claim 1, in which the air-conditioning unit (34) operates in recirculation mode.

Description

[0031] In the following, some embodiments are explained in more detail with reference to the figures. They show:

[0032] FIG. 1 shows a schematic side view of a system according to the invention,

[0033] FIG. 2 shows a sectional view through an energy storage device for use in a system according to FIG. 1,

[0034] FIG. 3 shows a top view of the energy store from FIG. 2, and

[0035] FIG. 4 shows a schematic representation of an air conditioning unit for use in a system according to FIG. 1.

[0036] In the figures, identical or functionally similar components are given the same reference signs.

[0037] FIG. 1 shows an embodiment of a system 2 according to the invention for air-conditioning the interior spaces 4 of a building 6. The building 6 may, for example, be a residential building or an office building. However, the invention can be applied to different types of buildings, thus the example shown should not be considered definite. Each of the interior spaces 4 is connected via an exhaust air opening 8 to an exhaust air duct 10, which removes exhaust air from the interior spaces 4.

[0038] The exhaust air duct 10 is connected via a supply line 12 to an energy storage device 14, which has a liquid reservoir 16 in a lower part, in which a heat exchanger 18 is located. The energy reservoir 14 is located outside the building 6 and is typically embedded below ground level. Above the liquid reservoir 16, an air heat exchanger 22 is located above an insulation layer 20.

[0039] The air heat exchanger 22 is arranged in several segments around a central area 24 of the energy reservoir 14. The exhaust air supplied via the supply line 12 is first passed through a heat exchanger not shown in FIG. 1, which is located below the insulation layer 20 and is marked with the reference sign 26 in FIG. 1, so that the energy contained in the exhaust air is first supplied to the liquid reservoir 16.

[0040] After passing through the heat exchanger 26, the air is guided radially from the outside through the air heat exchanger 22 and leaves the system 2 in the central area 24. For the operation of the heat exchanger 18, a fluid circuit 28 is provided which connects the heat exchanger 18 with a heat pump 30 preferably arranged inside the building 6. A further fluid circuit 32 connects the heat pump 30 to an air conditioning unit 34 which, in addition to the connection to the further fluid circuit 32, has a supply of outdoor air through an opening 36 by means of the supply line 38.

[0041] Furthermore, the heat pump 30 can also be connected to other components, such as a hot water tank 40 which is connected to a heating system 42. However, these components do not form part of the invention, so that a detailed description thereof can be dispensed with.

[0042] In FIG. 2, the energy storage device 14 is shown in a cross-sectional view. The energy storage device 14 has multiple pipes in the fluid reservoir 16 which are connected to the heat pump 30 via the fluid circuit 28. Typically, the fluid reservoir 16 will be filled with water or a paraffin solution. Above the fluid is the heat exchanger 26, through which the exhaust air of the building 6 flows radially outwards, so that the exhaust air leaves as extract air 44 through a slot between the insulation layer 20 and an outer shell 46. A fan 48 in the central area 24, which draws the extract air 44 together with outdoor air 50, which can flow in radially from outside between the sleeve 26 and a cover 52, in the direction of the central area 24, where the air then leaves the system 2.

[0043] The air heat exchanger 22 is above the liquid reservoir 16 above the insulation layer 20. The exhaust air supplied via the supply line 12 is first passed over the heat exchanger 26 so that the energy contained in the exhaust air is first transferred to the liquid reservoir 16. After passing through the heat exchanger 26, the air is led radially from the outside through the air heat exchanger 22 and leaves the system 2 in the central area 24. For the operation of the heat exchanger 18, in addition to the fluid circuit 28, which connects the heat exchanger 18 to a heat pump 30 preferably installed inside the building 6, a further fluid circuit not shown in the figures is provided, which connects the air heat exchanger 22 to the heat pump 30 installed inside the building 6.

[0044] With reference to FIG. 3, the distribution of the exhaust air from the building 6 is shown in more detail. The exhaust air is fed to the heat exchanger 26 at one point, so that after passing through the heat exchanger 26 it leaves it radially outwards. The heat exchanger 26 can be made of metal with multiple, particularly radially aligned fins, which direct the air flow as shown in FIG. 3.

[0045] With reference to FIG. 4, a schematic view of the air conditioning unit 34 is shown. In addition to supplying the outdoor air via the supply line 38, air can also be supplied via an inlet opening 60 and a connecting piece 62 via a fan 64 to a cooling or heating device 66 which is connected to the fluid circuit 32. Subsequently, the air thus tempered leaves the air-conditioning unit 34 through an outlet opening 68. Additional components, such as a bypass line for bypassing the cooling or heating device 66 in recirculation mode, can of course be added within the scope of expert knowledge.

[0046] In the system 2 for air-conditioning the interior spaces 4, the air-conditioning unit 34 is used for heating and cooling the outdoor air by means of the heat pump 30. The space heaters that are often present in regions where heating is required can be abandoned. The exhaust air from the interior rooms 4 of the building 6 is led over the energy storage 14 and blown out as extract air. A large part of the energy is thereby recovered by the heat pump 30 via the fluid circuit 28.

[0047] The features as described above, and in the claims, as well as those shown in the figures, can be advantageously implemented both individually and in various combinations. The invention is not limited to the described embodiments but can be modified in various ways within the scope of skilled craftsmanship.

LIST OF REFERENCE NUMBERS

[0048] 2 system

[0049] 4 interior spaces

[0050] 6 building

[0051] 8 exhaust air opening

[0052] 10 exhaust air duct

[0053] 12 supply line

[0054] 14 energy store

[0055] 16 liquid reservoir

[0056] 18 heat exchanger

[0057] 20 insulation layer

[0058] 22 air heat exchanger

[0059] 24 central area

[0060] 26 heat exchanger

[0061] 28 another fluid circuit

[0062] 30 heat pump

[0063] 32 fluid circuit

[0064] 34 air conditioning unit

[0065] 36 opening

[0066] 38 inlet line

[0067] 40 hot water tank

[0068] 42 heating system

[0069] 44 extract air

[0070] 46 outer shell

[0071] 48 fan

[0072] 50 outdoor air opening

[0073] 52 cover

[0074] 60 inlet opening

[0075] 62 connecting piece

[0076] 64 fan

[0077] 66 cooling or heating device

[0078] 68 outlet opening