Field of the invention

The invention relates to an arrangement in a shell structure of a building as defined in the preamble of independent claim 1.

The invention also relates to various uses of the arrangement as defined in claims 35 to

37.

With a shell structure of a building is in this context meant for example the roof and the facade of a building.

Various arrangements in shell structures of buildings are known in the art.

Publication US 6,494,200 presents a device for transferring heat between a panel heated by solar radiation and a wall surface, including an insulating plate mounted parallel between the panel and the wall surface, to define a closed external space between the panel and the insulating plate, and a closed internal space between the insulating plate and the wall. An air circulator is interposed between the external space and the internal space and can be put selectively in an open state allowing circulation of air between the external space and the internal space, and thus allowing thermal transfer between the panel and the wall, and a closed state preventing circulation of air between the external space and the internal space, and thus preventing thermal transfer between the panel and the wall.

Publication EP 1256767 presents a device for facade cladding of buildings. The device comprises at least one insulating panel, which comprises, on at least one flat side, grooves, into which pipelines are inserted, through which a liquid heat exchange medium flows. The device comprises also a final coating. First grooves are arranged in a first flat side of the insulating panel, into which first pipelines are inserted and second grooves lying opposite the first are arranged in a second flat side. The final coating comprises a first reinforced mortar layer, which is arranged on the first flat side of the insulating panel. At least the first and the second pipelines are to be at least partially connected to each other. Second pipelines are inserted into the second grooves and the final coating comprises a second reinforced mortar layer which is arranged on the second flat side.

Publication US 6,061978 presents a vented cavity radiant barrier assembly and method.

The vented cavity radiant barrier assembly includes a barrier, typically a PV module, having inner and outer surfaces. A support assembly is secured to the barrier and extends inwardly from the inner surface of the barrier to a building surface creating a vented cavity between the building surface and the barrier inner surface. A low emissivity element is mounted at or between the building surface and the barrier inner surface. At least part of the cavity exit is higher than the cavity entrance in order to promote cooling air flow through the cavity. Object of the invention

The object of the invention is to provide a simple arrangement for a shell structure of a building which arrangement can be used for heating and/or for cooling the building or a part of the building.

Short description of the invention

The arrangement of the invention is characterized by the definitions of independent claim

1.

Preferred embodiments of the arrangement are defined in the dependent claims 2 to 34. The arrangement comprises a first sheet that forms an outer surface of the shell structure of the building and that is in contact with the atmosphere surrounding the building.

The arrangement comprises furthermore a first air space that is in contact with the first sheet for exchanging thermal energy between air flowing in the first air space and the first sheet.

The arrangement comprises furthermore a second air space for exchanging thermal energy between air flowing in the second air space and heat accumulating material.

The arrangement comprises furthermore a connecting channel between the first air space and the second air space for feeding air from the first air space to the second air space.

The first air space and the second air space are being spaced apart from each other.

The first air space is provided with an inlet for feeding air into the first air space from the outside of the shell structure and the second air space is provided with an outlet for feeding air from the second air space to the outside of the shell structure.

In a particularly preferred embodiment of the invention, the arrangement comprises a first sheet in the form of a first corrugated profiled sheet having first parallel elongated protrusions and first parallel elongated depressions between two adjacent first parallel elongated protrusions, and a second sheet in the form of a second corrugated profiled sheet having second parallel elongated protrusions and second parallel elongated depressions between two adjacent second parallel elongated protrusions. In this preferred embodiment the arrangement comprises an insulation layer between the first sheet and the second sheet. In this preferred embodiment the arrangement comprises heat accumulating material in the form of a heat accumulating mass such as concrete that is poured into the second parallel elongated protrusions of the second corrugated profiled sheet on the side of the second corrugated profiled sheet that is faced against the first corrugated profiled sheet so that the concrete does not completely fill the second parallel elongated protrusions of the second corrugated profiled sheet on the side of the second corrugated profiled sheet that is faced against the first corrugated profiled sheet. In this preferred embodiment the arrangement comprises a first air space in the form of separate elongated first air channels which are formed by the first parallel elongated protrusions on the side of the first corrugated profiled sheet that is faced against the second corrugated profiled sheet and by the face of the insulation layer that is faced against the first corrugated profiled sheet. In this preferred embodiment the arrangement comprises a second air space in the form of separate elongated second air channels which are formed by the second parallel protrusions on the side of the second corrugated profiled sheet that is faced against the first corrugated profiled sheet and by the face of the insulation layer that is faced against the second corrugated profiled sheet.

The arrangement of the invention can be used for cooling and/or for heating of buildings or parts of buildings.

The arrangement can for example be used for cooling down a building during a clear night as shown in figure 19. During a clear night the temperature of the first layer is lowered due to re-radiation of thermal energy back into the space. In figure 19 air is drawn into the first air space via the inlet. Due to the re-radiation of thermal energy back into the space, the temperature of the first sheet is lowered to a level lower than the temperature of the air surrounding the building. Because the temperature of the air that is drawn into the first air space will therefore be higher than the temperature of the first sheet, thermal energy will flow from air flowing in the first air space to the first sheet and the temperature of air flowing in the first air space will consequently decrease. Air, the temperature of which has been decreased in the first air space, is lead from the first air space to the second air space via the connection channel. Provided that the temperature of the heat accumulating material is higher than the temperature of the air flowing in the second air space, thermal energy will flow from the heat accumulating material to air flowing in the second air space and the temperature of the heat accumulating material will consequently decrease.

The arrangement can for example be used for heating up a building during a cold day when the sun shines as shown in figure 18. In figure 18 air is drawn into the first air space via the inlet. As the sun shines on the first sheet, the temperature of the first sheet raises to a level higher than the temperature of the air surrounding the building. Because the temperature of the air that is drawn into the first air space will therefore be lower than the temperature of the first sheet, thermal energy will flow from the first sheet to air flowing in the first air space and the temperature of air flowing in the first air space will consequently rise. Air, the temperature of which has been raised in the first air space, is lead from the first air space to the second air space via the connection channel. Provided that the temperature of the heat accumulating material is lower than the temperature of the air flowing in the second air space, thermal energy will flow from air flowing in the second air space to the heat accumulating material and the temperature of the heat accumulating material will consequently rise.

The arrangement of the invention can be formed by using ordinary building material. List of figures

In the following the invention will be described in more detail by referring to the figures, of which

figure 1 shows in cross-section a function principle of a sloping roof that is provided with building elements according to a preferred embodiment of the invention,

figure 2 shows a principle view of an embodiment of the arrangement that is in the form of a pre-fabricated building element,

figure 3 shows in cross-section two building elements which are functionally connected to each other,

figure 4 shows in top view a roof on which 14 building elements have been mounted, figure 5 shows a cross-section of a first preferred embodiment of the arrangement, figure 6 shows a cross-section of a second preferred embodiment of the arrangement, figure 7 shows a cross-section of a third preferred embodiment of the arrangement, figure 8 shows a cross-section of a fourth preferred embodiment of the arrangement, figure 9 shows a cross-section of a fifth preferred embodiment of the arrangement, figure 10 shows a cross-section of a sixth preferred embodiment of the arrangement, figure 11 shows a cross-section of a seventh preferred embodiment of the arrangement, figure 12 shows a cross-section of an eighth preferred embodiment of the arrangement, figure 13 shows a cross-section of a ninth preferred embodiment of the arrangement, figure 14 shows a cross-section of a tenth preferred embodiment of the arrangement figure 15 shows a cross-section of an eleventh preferred embodiment of the arrangement, figure 16 shows a cross-section of a twelfth preferred embodiment of the arrangement, figure 17 shows a cross-section of a thirteenth preferred embodiment of the arrangement, figure 18 shows the working principle of a preferred embodiment of the arrangement during the heating season,

figure 19 shows the working principle of a preferred embodiment of the arrangement during the cooling season,

figure 20 shows a cross-section of a fourteenth preferred embodiment of the arrangement, figure 21 shows the working principle of a preferred embodiment of the arrangement.

Detailed description of the invention

Figure 1 show a cross section of a building 33 that is provided with a shell structure 34 in the form of a sloping roof.

Figure 2 is a principle view of an embodiment of the arrangement of the invention where the arrangement is in the form of a pre-fabricated building element 32 which is intended to be arranged to a building 33 so that the building element 32 forms part of the shell structure 34 of the building 33 and so that the first sheet 1 of the building element 32 forms part of the outer surface of the building 33. Alternatively the arrangement may be formed at the building site on the building 33.

The figures 5 to 17 show in cross-section various embodiments of an arrangement in a shell structure 34 of a building 33 according to the invention. The arrangements may be applied both in facades and in roofs of buildings 33. The arrangement comprises a first sheet 1 that forms an outer surface of the shell structure 34 of the building 33.

The first sheet 1 is preferably made of metal or other material having good thermal conductivity.

The arrangement comprises a first air space 29 that is in contact with the first sheet 1 for exchanging thermal energy between air flowing in the first air space 29 and the first sheet 1.

The first air space 29 can be in direct contact with the first sheet 1 so that air flowing in the first air space 29 is in direct contact with the first sheet 1. Alternatively the first air space 29 can be in indirect contact with the first sheet 1 so that air flowing in the first air space 29 is in indirect contact with the first sheet 1 via another material.

The arrangement comprises a second air space 30 for exchanging thermal energy between air flowing in the second air space 30 and heat accumulating material 4.

The heat accumulating material 4 may be part of the arrangement. For example if the arrangement is in the form of a pre-fabricated building element 32 as shown in figure 2, the pre- fabricated building element 32 may comprise heat accumulating material 4. Alternatively, the heat accumulating material 4 may be constituted of the building 33 itself or of a part of the building 33 on which the arrangement is applied or constructed.

The heat accumulating material 4 may be a material capable of phase transition such as vaporization, condensation, freezing, melting, deposition, and sublimation.

The heat accumulating material 4 may be in the form of a heat accumulating mass 22 such as concrete. The heat accumulating material 4 may also be in the form of granulate material such as gravel, whereby a part of the air flowing in the second air space 30 may flow trough the heat accumulating material 4 in the form of granulate material an in this manner enhance the exchanging of thermal energy between air flowing in the second air space 30 and the heat accumulating material 4.

The second air space 30 can be in direct contact with the heat accumulating material 4 so that air flowing in the second air space 30 is in direct contact with the heat accumulating material 4. Alternatively the second air space 30 can be in indirect contact with the heat accumulating material 4 so that air flowing in the second air space 30 is in indirect contact with the heat accumulating material 4 via another material.

The arrangement comprises connecting channels 5 between the first air space 29 and the second air space 30 for feeding air from the first air space 29 to the second air space 30.

The first air space 29 and the second air space 30 are arranged spaced apart from each other.

The first air space 29 is provided with an inlet 6 for feeding air into the first air space 29 from the outside of the shell structure 34 of the building 33, and the second air space 30 is provided with an outlet 7 for feeding air from the second air space 30 to the outside of the shell structure 34 of the building 33. The first air space 29 is preferably, but not necessarily, designed so that air is drawn into the first air space 29 solely from the outside of the shell structure 34.

The first air space 29 is preferably, but not necessarily, designed so that air is drawn into the first air space 29 solely from the outside of the building 33.

The first air space 29 is preferably, but not necessarily, provided with an inlet 6 or inlets 6 for solely drawing air into the first air space 29 from the outside of the shell structure 34.

The first air space 29 is preferably, but not necessarily, provided with an inlet 6 or inlets

6 for solely drawing air into the first air space 29 from the outside of the building 33.

The first air space 29 is preferably, but not necessarily, designed so that air is removed from the first air space 29 solely to the second air space 30.

The first air space 29 is preferably, but not necessarily, provided with a connecting channel 5 or connecting channels 5 for solely removing air from the first air space 29 to the second air space 30.

The second air space 30 is preferably, but not necessarily, designed so that air is drawn into the second air space 30 solely from the first air space 29.

The second air space 30 is preferably, but not necessarily, provided with a connecting channel 5 or connecting channels 5 for solely drawing air into the second air space 30 from the first air space 29.

The second air space 30 is preferably, but not necessarily, designed so that air is removed from the second air space 30 solely to the outside of the shell structure 34.

The second air space 30 is preferably, but not necessarily, designed so that air is removed from the second air space 30 solely to the outside of the building 33.

The second air space 30 is preferably, but not necessarily, provided with an outlet 7 or outlets 7 for solely removing air from the second air space 30 to the outside of the shell structure 34.

The second air space 30 is preferably, but not necessarily, provided with an outlet 7 or outlets 7 for solely removing air from the second air space 30 to the outside of the building 33.

The second air space 30 can also, but not necessarily, provided with an outlet 7 or outlets

7 for solely removing air from the second air space 30 to the inside of the building 33. In such case the outlet 7 or the outlets 7 are preferably, but not necessarily, provided with filtering means (not shown) for removing impurities from the air before the air enters the inside of the building.

The first air space 29 is preferably, but not necessarily, divided into several separate first air channels 2 which are essentially parallel and which are in contact with the first sheet 1 for exchanging thermal energy between air flowing in the several separate first air channels 2 and the first sheet 1.

The second air space 30 is preferably, but not necessarily, divided into several separate second air channels 3 which are essentially parallel and which are in contact with the heat accumulating material 4 for exchanging thermal energy between air flowing in the several separate second air channels 3 and the heat accumulating material 4.

If the first air space 29 is divided into several separate first air channels 2, which are essentially parallel and if the second air space 30 is divided into several separate second air channels 3, which are essentially parallel, the separate first air channels 2 and the separate second air channels 3 are preferably, but not necessarily, essentially parallel and the separate first air channels 2 are arranged spaced apart from the separate second air channels 3.

In figure 2 the first air space 29 is divided into several separate first air channels 2, which are essentially parallel and the second air space 30 is divided into several separate second air channels 3, which are essentially parallel and the several separate first air channels 2 are arranged in a first plane 8 and several separate second air channels 3 are arranged in a second plane 9 that is essentially parallel with the first plane 8.

If the first air space 29 is divided into several separate first air channels 2, an inlet 6 is preferably provided at one end of each separate first air channel 2 and each second opposite end of each separate first air channel 2 is preferably connected to a connecting channel 5.

If the second air space 30 is divided into several separate second air channels 3, an outlet 7 is preferably provided at one end of each second air channel 3 and each second opposite end of each second air channel 3 is preferably connected to a connecting channel 5.

If the first air space 29 is divided into several separate first air channels 2, the separate first air channels 2 extend preferably, but not necessarily, along the first sheet 1.

The arrangement may, as is shown in figures 5 and 6, and 8 to 17, comprise an insulation layer 10. The insulation layer 10 can be in the form of a glass wool sheet or a rock wool sheet or in the form of blown insulation material or insulation material in bulk form.

The arrangement may, as is shown in figures 5, 8, 10, 16, and 17, comprise an insulation layer 10 that is arranged between the first air space 29 and the second air space 30.

The first sheet 1 is preferably, but not necessarily, attached to the insulation layer 10 so that the face of the first sheet 1 that is faced against the insulation layer 10 is attached to the face of the insulation layer 10 that is faced against the first sheet 1.

If the arrangement comprises a insulation layer 10, the insulation layer 10 may, as shown in figures 6 and 13 to 15, comprise first elongated grooves 11 in the face of the insulation layer

10 that is faced against the first sheet 1 so that the first sheet 1 covers the first elongated grooves

11 to form an first air space 29 in the form of parallel first air channels 2 which are in contact with the first sheet 1 for exchanging thermal energy between air flowing in the parallel first air channels 2 and the first sheet 1.

The first sheet 1 may, as shown in figures 5, 7 to 12, 16 and 17 be in the form of a first corrugated profiled sheet having, as seen from the side of the first corrugated profiled sheet that is faced against the insulation layer 10, first parallel elongated protrusions 12 and first parallel elongated depressions 13 between two adjacent first parallel elongated protrusions 12. In this case, the arrangement may, as shown in figures 5, 7 to 12, 16, and 17, comprise a first air space 29 in the form of parallel first air channels 2 which are formed by using first parallel elongated protrusions 12 of the first corrugated profiled metal sheet.

If the first sheet 1 is in the form of a first corrugated profiled sheet having first parallel elongated protrusions 12 and first parallel elongated depression 13, the first sheet 1 may additionally, as shown in figure 20, be provided with third parallel elongated protrusions 31 on the side of the first sheet 1 that is faced away from the first air space 29, which third parallel elongated protrusions 31 extending in a direction transverse to the first parallel elongated protrusions 12 and the first parallel elongated depression 13. Such third parallel elongated protrusions can for example cut air flows on the surface of the first sheet 1 which otherwise would flow along the complete surface of the first sheet 1 and so would unnecessarily cool down the first sheet 1 and so partly prevent the first sheet 1 from being heated by solar radiation.

If the arrangement comprises an insulation layer 10, the insulation layer 10 may, as shown in figure 15 comprise a second air space 30 in the form of second air channels 3 which in turn are in the form of second elongated grooves 14 in the face of the insulation layer 10 that is faced away from the first sheet 1 so that the face of the insulation layer 10 that is faced away from the first sheet 1 forms a second outer surface 15 of the arrangement that is situated on the opposite side of the arrangement as seen from the first sheet 1 and that is intended to be applied on a surface of building 33 forming heat accumulating material 4 so that the second elongated grooves 14 form a second air space 30 in the form of second air channels 3.

The arrangement may as shown in figures 5 to 14 and 16 be provided with heat accumulating material 4 for storing thermal energy. In this case the second air space 30, which in the figures 5 to 14 and 16 are in the form of second air channels 3 are in contact with the heat accumulating material 4 of the arrangement for exchanging thermal energy between air flowing in the second air channels 3 and the heat accumulating material 4 of the arrangement.

If the arrangement is provided with an insulation layer 10 and a heat accumulating material 4, the insulation layer 10 is preferably, but not necessarily, provided between the first sheet 1 and the heat accumulating material 4 as is shown in figures 6 and 8 to 17.

The arrangement may be, as shown in figures 11 and 13 be provided with heat accumulating material 4 in the form of a heat accumulating sheet 16, which covers the second elongated grooves 14 in the face of the insulation layer 10 that is faced away from the first sheet 1 to form a second air space 30 in the form of second air channels 3 of the second elongated grooves 14 for exchanging thermal energy between air flowing in the second air channels 3 and the heat accumulating sheet 16.

The arrangement may be, as shown in figures 5 to 10, 12, and 14 to 17, provided with a second sheet 17, wherein the first sheet 1 and the second sheet 17 are arranged spaced apart from one another.

The second sheet 17 is preferably made of metal or other material having good thermal conductivity.

If the arrangement is provided with a second sheet 17, the first sheet 1 and second sheet

17 are essentially parallel.

If the arrangement is provided with a second sheet 17, the second air space 30 or the second air channels 3 extend preferably, but not necessarily, along the second sheet 17 in the arrangement.

If the arrangement is provided with a second sheet 17, the arrangement is preferably, but not necessarily, as shown in figures 5 to 6, 8 to 10, 12, and 14 to 17, provided with an insulation layer 10 between the first sheet 1 and the second sheet 17.

Figure 7 shows an arrangement that is provided with a second sheet 17 and that has an empty space between the first sheet 1 and the second sheet 17 which can function as an isolator.

If the arrangement is provided with a second sheet 17 and an insulation layer 10 between the first sheet 1 and the second sheet 17, the second sheet 17 may be attached to the insulation layer 10 so that the face of the second sheet 17 that is faced against the insulation layer 10 is attached to the face of the insulation layer 10 that is faced against the second sheet 17.

If the arrangement is provided with a second sheet 17 and with an insulation layer 10 between the first sheet 1 and the second sheet 17, the insulation layer 10 may comprise second elongated grooves 14 in the face of the insulation layer 10 that is faced against the second sheet 17, and the second sheet 17 may cover the second elongated grooves 14 to form a second air space 30 in the form of second air channels 3 which are in contact with the second sheet 17 for exchanging thermal energy between air flowing in the second air channels 3 and the second sheet 17.

If the arrangement is provided with a second sheet 17, the second sheet 17 can, as shown in figures 5 to 8, 10, and 16 to 17, be in the form of a second corrugated profiled sheet having, as seen from the side of the second corrugated profiled sheet that is faced against the first sheet 1, second parallel elongated protrusions 18 and second parallel elongated depressions 19 between two adjacent second elongated protrusions.

In figures 9, 11, 12, 14, and 15 the second sheet 17 is in the form of a planar sheet.

In figures 5 to 8, 10, and 16 to 17 the arrangement comprises a second air space 30 in the form of second air channels 3 which are formed by using second parallel elongated protrusions

18 of the second corrugated profiled metal sheet. More precisely, second air channels 3 are formed between the second parallel elongated protrusions 18 of the second corrugated profiled metal sheet and the insulation layer 10.

In figures 9, 11, 12, 14, and 15, where the second sheet 17 is in the form of a second planar sheet, the face of the insulation layer 10 that faces the second sheet 17 is provided with second elongated grooves 14 so that a second air space 30 in the form of second air channels 3 are formed by the second elongated grooves 14 which are covered by the second planar sheet.

If the arrangement is provided with a second sheet 17 in the form of a second corrugated profiled sheet having, as seen from the side of the second corrugated profiled sheet that is faced against the first sheet 1 , second parallel elongated protrusions 18 and second parallel elongated depressions 19 between two adjacent second elongated protrusions, heat accumulating material 4 in the form of heat accumulating mass 22 such as concrete can be applied in at least one of said second parallel elongated protrusions 18. Such embodiments are shown in figures 5 to 7 and 17. In figures 5 to 7 and 16 the heat accumulating mass 22 fills up said second parallel elongated protrusions 18 only partly so that a second air space 30 in the form of separate second air channels 3 are formed between the heat accumulating mass 22 and the insulation layer 10 in each second parallel elongated protrusion 18.

In the arrangement a heat accumulating material 4 can be arranged between the first sheet

1 and the second sheet 17 as is shown in figures 5, 6, 7, and 17.

In the arrangement a heat accumulating material 4 can be arranged on the side of the second sheet 17 that is faced towards the first sheet 1 as is shown in figures 5, 6, 7, and 17.

In the arrangement a heat accumulating material 4 can be arranged on the side of the second sheet 17 that is faced away from the first sheet 1 as is shown in figures 8, 9, 10, 12, 14, 15.

In the arrangement a heat accumulating material 4 can be in the form of heat accumulating mass 22 such as concrete that is applied to a face of the second sheet 17 as is shown in figures 5, 6, 7, 8, 9, 14, 15, and 16.

In the arrangement a heat accumulating material 4 can be in the form of a heat accumulating sheet 16 that is applied to the side of the second sheet 17 that is faced away from the first sheet as is shown in figures 10, 12, and 16.

In the arrangement a heat accumulating material 4 can be in the form of a heat accumulating sheet 16 that is fastened to the side of the second sheet 17 that is faced towards the first sheet.

If the arrangement is provided with a second sheet 17 the second sheet 17 itself can form a heat accumulating material 4 as is shown in figure 11.

The arrangement can be provided with a flow means 27 and with a motor means 28 for operating the flow means to create a flow of air from the outside of the shell structure 34 of the building 33 into the first air space 29 and from the first air space 29 into the second air space 30 and from the second air space 30 back to the outside of the shell structure 34 of the building 33. The arrangement is preferably provided with temperature sensors for controlling the function of the motor means 28 based for example on the temperature of the air flowing in the first air space 29, the second air space 30, the temperature of the first sheet, the temperature of the heat accumulating material, the temperature of the air surrounding the building 33 and/or the temperature inside the building 33. The arrangement can also be provided with a timer for controlling the function of the motor means 28 dependent on the time of the day.

The arrangement can be provided with a moisture collecting means for collecting liquid such as water that is condensed from air flowing in the air channels.

Next some preferred embodiments of the arrangement of the invention will be described in greater detail.

Figure 5 shows a cross-section of a first preferred embodiment of the arrangement, which is a particularly preferred embodiment of the invention.

The arrangement shown in figure 5 comprises a first sheet 1 in the form of a first corrugated profiled sheet having first parallel elongated protrusions 12 and first parallel elongated depressions 13 between two adjacent first parallel elongated protrusions 12.

The arrangement shown in figure 5 comprises a second sheet 17 in the form of a second corrugated profiled sheet having second parallel elongated protrusions 18 and second parallel elongated depressions 19 between two adjacent second parallel elongated protrusions 18.

The arrangement shown in figure 5 comprises an insulation layer 10 between the first sheet 1 and the second sheet 17.

The arrangement shown in figure 5 comprises heat accumulating material 4 in the form of a heat accumulating mass 22 which in figure 5 is concrete that is poured into the second parallel elongated protrusions 19 of the second corrugated profiled sheet on the side of the second corrugated profiled sheet that is faced against the first corrugated profiled sheet so that the concrete does not completely fill the second parallel elongated protrusions 18 of the second corrugated profiled sheet on the side of the second corrugated profiled sheet that is faced against the first corrugated profiled sheet.

In the arrangement shown in figure 5, a first air space 29 in the form of separate elongated first air channels 2 is formed by the first parallel elongated protrusions 12 on the side of the first corrugated profiled sheet that is faced against the second corrugated profiled sheet and by the face of the insulation layer 10 that is faced against the first corrugated profiled sheet.

In the arrangement shown in figure 5, a second air space 30 in the form of separate elongated second air channels 3 is formed by the second parallel protrusions 18 on the side of the second corrugated profiled sheet that is faced against the first corrugated profiled sheet and by the face of the insulation layer 10 that is faced against the second corrugated profiled sheet.

Figure 5 shows a cross-section of a second preferred embodiment of the arrangement, which corresponds to the first preferred embodiment of the arrangement shown in figure 5 with the exception that the arrangement shown in figure 5 comprises a first sheet 1 in the form of an essentially planar first sheet and with the exception that the insulation layer 10 comprises first parallel elongated grooves 11 in the face of the insulation layer 10 that is faced against the essentially planar first sheet. The face of the essentially planar first sheet that is faced against insulation layer 10 is in contact with the insulation layer 10 so that the essentially planar first sheet covers the first parallel elongated grooves 11 in the face of the insulation layer 10 to form a first air space 29 in the form of first air channels 2 which are in contact with the first sheet 1 for exchanging thermal energy between the air flowing in the first air channels 2 and the first sheet 1.

Figure 7 shows a cross-section of a third preferred embodiment of the arrangement, which corresponds to the first preferred embodiment of the arrangement shown in figure 5 with the main exception that it does not comprise an insulation layer 10 between the first sheet 1 and the second sheet 17.

The arrangement shown in figure 3 comprises spacer elements 20 for attaching the first sheet 1 to the second sheet 17 so that the first sheet 1 and the second sheet 17 are arranged spaced apart.

To form the first air channels 2 in the arrangement shown in figure 3, a third sheet 21 is attached to the side of the first corrugated profiled sheet that is faced against the second corrugated profiled sheet so that a first air space 29 in the form of elongated first air channels 2 is formed by the first parallel elongated protrusions 12 on the side of the first corrugated profiled sheet that is faced against the second corrugated profiled sheet and by the face of the third sheet 21 that is faced against the first corrugated profiled sheet.

To form the second air channels 3 in the arrangement shown in figure 3, a fourth sheet 23 is attached to the side of the second corrugated profiled sheet that is faced against the first corrugated profiled sheet so that a second air space 30 in the form of elongated second air channels 3 is formed by the second parallel elongated protrusions 19 on the side of the second corrugated profiled sheet that is faced against the first corrugated profiled sheet and by the face of the fourth sheet 23 that is faced against the second corrugated profiled sheet.

In the arrangement shown in figure 3 the empty space (not marked with a reference numeral) between the first sheet 1 and the second sheet 17 functions partly as an insulator.

Figure 8 shows a cross-section of a fourth preferred embodiment of the arrangement, which corresponds to the first preferred embodiment of the arrangement shown in figure 5 with the main exception that heat accumulating material 4 in the form of heat accumulating mass 22 that in figure 8 is of concrete is applied on the side of the second sheet 17, which is faced away from the first sheet 1.

In figure 8 a fifth sheet 24 is applied to the side of the heat accumulating material 4 that is faced away from the second sheet 17. The fifth sheet 24 forms an outer face of the arrangement shown in figure 8.

Figure 9 shows a cross-section of a fifth preferred embodiment of the arrangement, which corresponds to the fourth preferred embodiment of the arrangement shown in figure 8 with the main exception that the second sheet 17 is the form of an essentially planar second sheet.

In figure 9, the face of the insulating layer 10 that is faced against the second sheet 17 is provided with second parallel elongated grooves 14.

To form a second air space 30 in the form of second air channels 3 in the arrangement shown in figure 5, the second sheet 17 that is in the form of an essentially planar second sheet has been attached to the side of the of the insulating layer 10 that is faced against the second sheet 17 is provided with elongated depressions to form second air channels 3.

In figure 9 heat accumulating material 4 in the form of heat accumulating mass 22 that in figure 9 is concrete is applied on the side of the second sheet 17, which is faced away from the first sheet 1. As in figure 8, a fifth sheet 24 is applied to the side of the heat accumulating material 4 in the form of concrete that is faced away from the second sheet 17. The fifth sheet 24 forms an outer face of the arrangement shown in figure 9.

Figure 10 shows a cross-section of a sixth preferred embodiment of the arrangement, which corresponds to the fourth embodiment shown in figure 8 with the exception that instead of using heat accumulating mass as heat accumulating material 4, a heat accumulating sheet 16 is attached to the side of the second sheet 17 facing away from the first sheet 1 to form accumulating material 4.

Figure 11 shows a cross-section of a seventh preferred embodiment of the arrangement, which corresponds to the fourth embodiment shown in figure 9 with the exception that no heat accumulating mass in the form of concrete or a fifth sheet is used, but instead the second sheet 17 itself constitutes heat accumulating material 4.

Figure 12 shows a cross-section of an eighth preferred embodiment of the arrangement, which corresponds to the sixth embodiment shown in figure 11 with the exception that a separate heat accumulating sheet 16 is attached to the side of the second sheet 17 facing away from the first sheet 1 to form accumulating material 4.

Figure 13 shows a cross-section of a ninth preferred embodiment of the arrangement, which corresponds to the sixth embodiment shown in figure 11 with the exception that the first sheet 1 is a first planar sheet and with the exception that the face of the insulation layer 10 that is faced against the first planar sheet is provided with first parallel elongated grooves 11 which the first planar sheet covers to create a first air space 29 in the form of first air channels 2.

Figure 14 shows a cross-section of a tenth preferred embodiment of the arrangement, which corresponds to the fifth embodiment shown in figure 9 with the main exception that the first sheet 1 is a first planar sheet and the face of the insulation layer 10 that is faced against the first planar sheet is provided with parallel first parallel elongated grooves 11 which the first planar sheet covers to create a first air space 29 in the form of the first elongated air channels 2.

Figure 15 shows a cross-section of an eleventh preferred embodiment of the arrangement, which corresponds to the tenth embodiment shown in figure 14 with the main exception that it does not comprise any second sheet or heat accumulating material 4. The face of the insulating layer 10 that is faced away from the first sheet 1 is provided with parallel second parallel elongated grooves 14 which form a second air space 30 in the form of second air channels 3 of the arrangement. The face of the insulating layer 10 that is faced away from the first sheet 1 also forms a second outer surface 15 of the arrangement. The eleventh preferred embodiment shown in figure 15 is intended to be mounted so that the second surface 15 is brought in contact with a building 33 or part of a building 33 which in this case forms a heat accumulating material 4. Figure 16 shows a cross-section of a twelfth preferred embodiment of the arrangement, which corresponds to the sixth embodiment shown in figure 10 with the exception that a sixth sheet 26 that is applied to the face of the first sheet 1 that is faced away from the insulating layer 10.

In figure 16 the first corrugated sheet is additionally formed such that the cross-section of the separate elongated first air channels 2 increases in the direction towards the sixth sheet 26 to have a large contact surface between the separate elongated first air channels 2 and the sixth sheet 26.

In figure 16 the second corrugated sheet is additionally formed such that the cross-section of the separate elongated second air channels 3 increases in the direction towards the heat accumulating sheet 16 to have a large contact surface between the separate elongated second air channels 3 and the heat accumulating sheet 16.

Figure 17 shows a cross-section of a thirteenth preferred embodiment of the arrangement, which corresponds to the first embodiment shown in figure 5 with the exception that the cross- section of the separate elongated second air channels 3 increases in the direction towards a heat accumulating sheet 4 on which the arrangement is applied to have a large contact surface between the separate elongated second air channels 3 and the heat accumulating material 4.

Figures 18 and 19 show two different operation situations of an embodiment of the arrangement.

Figure 18 shows an operating situation where solar radiation is used to heat up a building

33 during a cold day. In figure 18 air is drawn into the first air channel 2 via the inlet 6. As the sun shines on the first sheet 1 , the temperature of the first sheet 1 raises to a level higher than the temperature of the air surrounding the building 33. Because the temperature of the air that is drawn into the first air channel 2 will therefore be lower than the temperature of the first sheet, thermal energy will flow from the first sheet 1 to air flowing in the first air channel 2 and the temperature of air flowing in the first air channel 2 will consequently rise. Air, the temperature of which has been raised in the first air channel 2, is lead from the first air channel 2 to the second air channel 3 via the connection channel 5. Provided that the temperature of the heat accumulating material 4 is lower than the temperature of the air flowing in the second air channel 2, thermal energy will flow from air flowing in the second air channel 3 to the heat accumulating material 4 and the temperature of the heat accumulating material 4 will consequently rise.

Figure 19 shows an operating situation where the temperature of the first sheet 1 is during the night lowered due to re-radiation of thermal energy back into the space and/or due to the fact that it usually is colder outside during nighttime than during daytime. In figure 21 air is drawn into the first air channel 2 via the inlet 6. Due to the re -radiation of thermal energy back into the space, the temperature of the first sheet 1 is lowered to a level lower than the temperature of the air surrounding the building 33. Because the temperature of the air that is drawn into the first air channel 2 will therefore be higher than the temperature of the first sheet 1 , thermal energy will flow from air flowing in the first air channel 2 to the first sheet 1 and the temperature of air flowing in the first air channel 2 will consequently decrease. Air, the temperature of which has been decreased in the first air channel 2, is lead from the first air channel 2 to the second air channel 3 via the connection channel 5. Provided that the temperature of the heat accumulating material 4 is higher than the temperature of the air flowing in the second air channel 2, thermal energy will flow from the heat accumulating material 4 to air flowing in the second air channel 3 and the temperature of the heat accumulating material 4 will consequently decrease.

The invention relates also to uses of the arrangement.

Figure 1 shows an use of the arrangement for collecting liquid in the form of humidity from air. Provided that the temperature of the air is lowered in the first air space 29 and/or the second air space 30 by transferring thermal energy from the air flowing in the first air space 29 to the first sheet and/or by transferring thermal energy from the air flowing in the first air space 29 to the heat accumulating material, humidity in the air is condensed into water droplets in the air flowing in the air spaces. These water droplets can be collected either from the first air space 29 or the second air space 30. In figure 1, where the arrangement has been applied in a sloping roof, the humidity in the air will be condensed in the second air space 30 that is in the form of separate second air channels 3 and water droplets will trickle down the second air channel 3 towards a collection bin 25 that is arranged near the outlet 7 of the second air channels 3.

It is apparent to a person skilled in the art that as technology advances, the basic idea of the invention can be implemented in various ways. The invention and its embodiments are therefore not restricted to the above examples, but they may vary within the scope of the claims.

List of reference numerals

1. First sheet

2. First air channel

3. Second air channel

4. Heat accumulating material

5. Connecting channel

6. Inlet

7. Outlet

8. First plane

9. Second plane

10. Insulation layer

11. First parallel elongated groove

12. First parallel elongated protrusions

13. First parallel elongated depressions

14. Second parallel elongated groove

15. Second outer surface

16. Heat accumulating sheet

17. Second sheet

18. Second parallel elongated protrusions

19. Second parallel elongated depressions

20. Spacer element

21. Third sheet

22. Heat accumulating mass

23. Fourth sheet

24. Fifth sheet

25. Collecting bin

26. Sixth sheet

27. Flow means

28. Motor means

29. First air space

30. Second air space

31. Third parallel elongated protrusions

32. Pre-fabricated building element

33. Building

34. Shell structure