EP4253850B1 - Device for ventilating and tempering a room - Google Patents

Description

The invention relates to a device for ventilating and tempering a room in a building with at least one building ceiling according to the preamble of claim 1. The device comprises a carrier plate, at least one first air outlet cross-section which is arranged above the carrier plate and with which a first air volume flow can be guided through a ceiling gap arranged between the building ceiling and the carrier plate, and at least one second air outlet cross-section from which a second air volume flow can be emitted such that it can be guided below the carrier plate approximately parallel to the carrier plate.

The carrier plate can, for example, be one or more panels of a covered ceiling. It is also conceivable that the carrier plate is formed by a ceiling sail. The components of the device are mostly or entirely located in a gap between the building ceiling and the carrier plate.

To enable the second air volume flow to reach beneath the carrier plate, either at least one area of the carrier plate must have a perforation, or the second air outlet cross-section must be arranged at least partially beneath the carrier plate. The second air volume flow should be able to be guided approximately parallel to the carrier plate, which in most cases means that the second air volume flow runs approximately horizontally. The horizontally aligned second air volume flow is desirable because it covers a large distance and thus reaches large parts of the room, slowly "trickling" towards the floor of the room. This is advantageous in order to avoid unpleasant drafts, particularly in the event of cooling.

State of the art

A large number of devices are known from the state of the art that are intended for the ceiling area. A distinction is made between systems that are connected to a central ventilation system and those that work in recirculation mode and are therefore not fed by a ventilation system with externally processed so-called supply air or primary air. For example, EN 10 2010 001 319 A1 An air vent is known which is connected to a central ventilation system and is characterized in particular by the outflow of supply air parallel to the ceiling.

From the EN 10 2016 111 195 A1 On the other hand, a heating and cooling sail is known that works in recirculation mode.

The aforementioned devices are concerned exclusively with the temperature control or ventilation of a room, whereby any possible contamination of the air by viruses, bacteria, etc. and in particular their reduction are not taken into account.

A device that is also intended to clean the air supplied to a room is known from the EP 3 287 705 B1 known. The known device has a housing whose interior is divided into various sub-chambers, whereby the device is connected to a central ventilation system for supplying supply air. A tempering device is also connected upstream of the device so that already tempered supply air enters the device. The supply air enters a funnel-shaped anteroom which bundles the supply air into a jet. This jet is guided into a mixing chamber and enters the room to be ventilated via a perforated wall. At the same time, room air is induced into the mixing chamber via corresponding inlet openings. When the mixed air leaves the mixing chamber, part of the mixed air passes through a cleaning device which creates a chemical reaction between the components in the air.

From the EN 10 2005 038 199 A1 A device for air conditioning a room is produced which is mounted beneath a ceiling and has a support plate. The ceiling cavity thus obtained is fed via an air supply duct, whereby the air supply can optionally be tempered via heat exchangers and can leave the device into the room via openings. A radiator can also be integrated into the device. The device can also have a device for disinfecting the air, whereby UV-C lamps are arranged in the ceiling cavity to clean the air of bacteria, viruses and the like.

The document EN 10 2020 120 655 A1 deals with a room air disinfection device that is to be mounted on a suspended ceiling. The system is a recirculation system in which room air is sucked in by a fan and released back into the room via an air duct at another location. UV-C lamps are arranged in the air duct to disinfect the sucked-in room air.

The documents US 2002/ 0 031 460 A1 and US 2020/ 0 354 513 A1 describe devices for disinfecting room air, whereby the devices are completely are housed in a housing. The housing contains UV lamps that are intended to disinfect the circulating air.

The document EN 10 2017 125 131 A1 shows a ceiling panel that is equipped with heat exchanger elements. An air outlet is arranged in the ceiling cavity, through which supply air from a central ventilation system is released into the ceiling cavity via nozzles and into the room via perforations in the ceiling panel parallel to the ceiling. The document EN 10 2017 125 131 A1 discloses a device for ventilating and tempering a room according to the preamble of claim 1. Disinfection of circulating air is not provided.

Task

It is therefore an object of the present invention to provide an alternative device which has increased security against viruses, bacteria, etc. in the air, in particular which enables their reliable reduction or elimination or deactivation.

Solution

According to the invention, this object is achieved by a device having the features of claim 1. For this purpose, a disinfection device is provided by means of which at least part of the first air volume flow can be disinfected using UV-C radiation, wherein at least part of the first air volume flow can be guided between a support element for at least one UV-C radiation source and the support plate or the building ceiling and can be disinfected there. Advantageous embodiments emerge from the associated subclaims.

High-energy ultraviolet radiation is highly damaging to cells and can therefore be used to inactivate viruses, bacteria, etc. in the air. This requires a sufficiently high exposure dose, which results from the product of intensity and irradiation duration. Since UV-C radiation can also be harmful to people or objects, radiation must be prevented from escaping from the device or at least sufficiently reduced. This is achieved by adequately shielding the UV-C radiation from the space below the device, in particular by means of a shielding device.

According to the invention, at least a portion of the first air volume flow that flows above the carrier plate is irradiated with UV-C, whereby the carrier plate shields the radiation from the room to be ventilated. If the carrier plate is in the area in which UV-C radiation is emitted by the disinfection device, its upper side is not per se impermeable to radiation, a carrier plate that is perforated in this area, for example, can be provided with a covering layer (e.g. made of fleece) that is impermeable to UV-C radiation, preferably on its upper side, which can also take on an acoustic and optical function. This prevents radiation from passing through the carrier plate and consequently from coming into contact with people or objects in the room. Alternatively, the UV-C radiation can also radiate in the direction of the building ceiling.

Because the disinfection device is integrated into a device for ventilating and tempering a room, means for guiding the air volume flows are already present, so that the disinfection device does not require any additional means for guiding the air or generating an air flow. The disinfection device itself therefore works noiselessly. Furthermore, the integration of the disinfection device in the space between the building ceiling and the support plate has the advantage that no additional space is required for the disinfection device within the room and the disinfection device is housed so that it is not visible from the room.

With regard to the disinfection device, it is advantageous if there is intensive radiation. In addition to the choice of radiation source and its number, it can also be useful, for example, to create multiple reflections, so that the radiation intensity is further increased. The output should advantageously be high enough to achieve sufficient disinfection performance at air speeds between approx. 0.1 m/s and 2 m/s, preferably between 0.5 m/s and 1.5 m/s. For example, the UV radiation can be generated using LED technology, which is particularly energy efficient.

The disinfection device can be provided in such a way that the radiation radiates in a vertical, horizontal or oblique direction. In the case of horizontally oriented radiation, the disinfection device should advantageously be provided on one side or several sides of the device.

According to the invention, at least one part of the first air volume flow - or preferably the entire first volume flow - should be able to be guided between a support element for at least one UV-C radiation source and the support plate and be sterilized there. Accordingly, there is a gap between the support element and the support plate through which at least part of the first volume flow flows. The support element can be attached to the building ceiling and "hang" from it, or it can be connected to the support plate or placed on the support plate. In any case, the first air volume flow is irradiated from the support element in the direction of the carrier plate, whereby the radiation source can be mounted or adjusted in such a way that the radiation radiates vertically downwards, or at an angle so that the radiation forms an angle with the carrier plate.

Alternatively, according to an advantageous embodiment of the invention, at least one part of the first air volume flow - or preferably the entire first volume flow - can be guided between a support element for at least one UV-C radiation source and the building ceiling and can be disinfected there. This means that the emitted radiation is directed upwards towards the building ceiling, and can run vertically or diagonally.

According to a particularly advantageous embodiment of the invention, it is provided that almost the entire first air volume flow is disinfected using UV-C radiation. For the purposes of the present application, approximately 90% of the first air volume flow is considered to be almost the entire first air volume flow. This ensures particularly effective disinfection of the air. In this case, a distance between the carrier plate and the support element is advantageously 200 mm. Deviations of +/- 10 mm are not critical. With this distance, it is possible for almost the entire first volume flow to flow under the support element and thus be captured by the UV-C radiation.

With regard to the support element, it is also advantageous if it is elongated and aligned transversely to a flow direction of the first air volume flow that can be guided above the support plate. In this way, the air volume flow to be irradiated is continuously irradiated - at the speed of the volume flow - by the at least one UV-C radiation source.

According to a particularly preferred embodiment, the device according to the invention comprises a heat exchanger device that is thermally coupled to the carrier plate and through which a liquid heat transfer medium can flow. The heat exchanger device can be used to control the temperature of air volume flows close to the carrier plate, so that the room is temperature-controlled overall. The heat exchanger device can consist, for example, of pipes that are laid on the carrier plate and through which the heat transfer medium flows.

A further development of the invention provides that the at least one support element can be supported by means of at least one support element on the carrier plate and/or the heat exchanger device. In this way, a distance between the carrier plate and the support element for the UV-C radiation source, so that a free space is created through which the first air volume flow can pass. Furthermore, two support elements can preferably also be provided, so that the at least one support element and the support elements form a type of bridge. Depending on the length and load-bearing capacity of the support element, it can also be advantageous if more than two support elements are arranged.

In further developing the invention, the UV-C radiation source can have at least one UV-C diode or UV-C light source, by means of which UV-C radiation can be emitted in a wavelength range between 230 nm and 300 nm, preferably between 250 nm and 280 nm.

A particularly advantageous development of the device is designed so that the second air volume flow penetrates the carrier plate. The second air outlet cross-section is therefore located above the carrier plate, which is advantageous from an optical point of view, among other things. The carrier plate must therefore have means that allow it to penetrate. This can be done, for example, via nozzles. The second air volume flow preferably penetrates the carrier plate through one or a plurality of perforations in the carrier plate. This is particularly advantageous because the perforations in the carrier plate, among other things, even out the second air volume flow.

With regard to the carrier plate, it has proven particularly advantageous if this is a perforated metal plate, in particular a perforated sheet with circular openings. The second air volume flow can thus penetrate the carrier plate without additional means being required. Suspended ceilings or ceiling sails often have perforations, whereby the suspended ceiling or ceiling sail can then be used as a carrier plate for the device according to the invention. It is clear that the device according to the invention can be retrofitted if a suspended ceiling or ceiling sail is present.

Further developing the invention, the heat exchanger device has at least one pipe section which is arranged in a meander shape or in a harp shape, wherein preferably a cross section of the at least one pipe section is flattened, in particular oval, and further preferably a flattened side of the at least one pipe section is connected to the carrier plate via a coupling means which promotes heat conduction into the carrier plate.

Advantageously, the first air outlet cross-section arranged above the carrier plate is formed by a plurality of nozzles. If necessary, regulate the outflow speed, particularly by increasing it compared to other geometries and shapes of outlet cross sections. The nozzles are advantageously connected to a primary air system and are fed via this.

Alternatively or additionally, it can also advantageously be provided that the second air outlet cross-section, from which the second air volume flow can be discharged such that it can be guided below the carrier plate approximately parallel to the carrier plate, is formed by perforations in the carrier plate. Furthermore, an air baffle is preferably arranged above the second air outlet cross-section, the distance of which from the carrier plate decreases in the flow direction, preferably to zero. The air baffle, which advantageously extends over the entire width of the second air outlet cross-section, imposes a direction on the second air volume flow so that the second air volume flow leaves the second air outlet cross-section largely parallel to the carrier plate. The air baffle can have walls on opposite end faces so that an air distribution box is created according to the invention. Regardless of whether walls are present or not, the distance of the air baffle from the carrier plate in the flow direction preferably decreases continuously so that a low-turbulence flow is achieved.

The device according to the invention provides that the first air outlet cross-section arranged above the carrier plate can be supplied with primary air and that secondary air can be induced by means of the primary air exiting from the first air outlet cross-section, preferably from an air gap arranged between the carrier plate and the building ceiling, and that a mixed volume flow formed from the primary air and the secondary air (room air) can be disinfected in the disinfection device. This allows the treatment of contaminated mixed air, which can in particular contain contaminated secondary air (room air), without the supply air system itself coming into contact with secondary air. There is therefore no risk of germs or their decomposition products accumulating within the supply air system.

Furthermore, it is particularly advantageous if the illuminance of the UV source is regulated depending on the air speed so that a constant minimum irradiance is achieved.

Furthermore, a further development of the invention consists in that a distance between the first air outlet cross-section and an inlet cross-section of the disinfection device is between 300 mm and 1500 mm, preferably between 400 mm and 1200 mm, more preferably between 500 mm and 1000 mm. In this way, the first air volume flow is given sufficient length and thus time to induce secondary air, i.e. room air, and to feed it to the disinfection device as the largest possible and well-mixed mixed volume flow. With the help of a large mixed volume flow generated in this way, a sufficiently large number of passages of the air through the disinfection device can be achieved, e.g. a 5 to 8-fold treatment frequency of the room air per hour. This length, i.e. the area of the device between the first air outlet cross-section and the inlet cross-section into the disinfection device, can thus be understood as an induction zone. It is particularly advantageous if the air volume flow or the mixing volume flow in the induction zone is aligned horizontally.

According to an advantageous development of the invention, it is provided that a flow cross-section of the first air volume flow has the shape of a rectangle, wherein a length of the rectangle is at least 3 to 4 times a height of the rectangle. This refers to the flow cross-section in which the first air volume flow has a homogeneous distribution. For example, if the first air volume flow is generated by a row of nozzles, this means an air volume flow that occurs at a certain distance downstream from the nozzles. The air leaves the nozzles under pressure, whereby the nozzle jet expands in the direction of flow and connects with neighboring nozzle jets. Accordingly, the air volume flow referred to here begins in the shape of a rectangle at a distance from the nozzles that corresponds to a multiple of the diameter of the nozzles. This distance depends on several factors, namely the exit speed of the air exiting the nozzles, the temperature of the air and the distance between the nozzles. According to the present invention, the flow cross-section of the first air volume flow in the form of a rectangle is not strictly to be understood as an equiangular rectangle, but can also be trapezoidal and has no corners in the geometric sense; rather, it should be understood as a soft rectangular shape. Typically, the air volume flow hugs the carrier plate on its underside. On its upper side, the air volume flow has a decreasing tendency in the cooling case due to its "heaviness", whereas in the heating case it has an increasing tendency due to its "lightness".

According to the invention, the device provides an air distribution box that is arranged at one end of the carrier plate so that the carrier plate can be overflowed by the first air volume flow over its entire length. According to the invention, the air distribution box is positioned on one end of the carrier plate. The length of the air distribution box can be less or significantly less than the width of the carrier plate without losing effectiveness. This is because air blown out via nozzles can induce many times more air. An air distribution box with a length of between 600 mm and 700 mm is sufficient for most room sizes. The air distribution box can be connected to a central ventilation system particularly easily.

Finally, the device according to the invention provides that the air distribution box is connected to a central ventilation system.

Examples of implementation and alternative example

In the following, embodiments of the invention and an alternative example not falling within the scope of the invention are explained in more detail with the aid of figures.

Fig. 1:

eine dreidimensionale Ansicht einer ersten erfindungsgemäßen Vorrichtung,

Fig. 2:

ein schematischer Vertikalschnitt durch die Vorrichtung gemäß Figur 1,

Fig. 3:

ein schematischer Vertikalschnitt durch eine alternative Vorrichtung, die nicht unter die Erfindung fällt,

Fig. 4:

eine dreidimensionale Ansicht eines Raumes mit erfindungsgemäßen Vorrichtungen aus Figur 1.

It shows:

Fig.1:

a three-dimensional view of a first device according to the invention,

Fig. 2:

a schematic vertical section through the device according to Figure 1 ,

Fig. 3:

a schematic vertical section through an alternative device not covered by the invention,

Fig.4:

a three-dimensional view of a room with devices according to the invention Figure 1 .

Identical components of different embodiments are designated by the same reference numerals.

In the Figures 1 and 2 is an embodiment of a device 1 according to the invention for ventilation and temperature control of a room 2 in a building, wherein in the Figure 1 For the sake of clarity, a building ceiling 3 has not been shown. The device 1 comprises a support plate 4, which in the present example is formed by a ceiling sail 5. The support plate 4 has a length 6 and a width 7, with the support plate 4 having an upstand 8 with a height 9 on all four sides. A clear distance between the building ceiling 3 and the support plate 4 is approximately 200 mm.

An air distribution box 10 is placed on the carrier plate 4, which is connected to a central ventilation system of the building (not shown in the figures) via a corresponding supply air line 11 and is supplied with primary air. The primary air, which is symbolized by an arrow 12, leaves the air distribution box 10 via a first air outlet cross-section 13 as the first air volume flow, which is symbolized by arrows 14, into a ceiling gap 15 located between the building ceiling 3 and the carrier plate 4. In the Figure 2 It is clear that the primary air, arrow 12, is diverted by 180 degrees within the air distribution box 10; the entry of the primary air into the air distribution box 10 thus occurs from the same side as the exit of the primary air into the ceiling cavity 15.

The first air outlet cross-section 13 is formed by individual air outlet cross-sections of a row of nozzles 16 arranged on the air distribution box 10. The nozzles 16 are arranged in the Figure 1 clearly visible. In the Figure 2 Only one nozzle 16 of the nozzle row is visible, since this is the case with the Figure 2 shown vertical section are arranged one behind the other. The air distribution box 10 has a slightly smaller width 18 than the carrier plate 4, so that it can be placed between the raised edges 8 of the carrier plate 4. The primary air leaves the nozzles 16 as the first air volume flow, whereby the individual nozzle jets widen a few centimeters downstream of the nozzles 16 and merge into an air volume flow. From this area, the first air volume flow has the shape of a rectangle in cross section, whereby a length of the rectangle is approximately the width 18 of the air distribution box 10. In the present case, the height of the first air volume flow corresponds approximately to a clear height of a support element 22 described below, the clear height in the present case being approximately 20 cm. This height is advantageous because it allows as large a proportion of the first air volume flow as possible to be captured, while at the same time allowing installation close to the ceiling.

In the Figure 1 it can be clearly seen that the first air volume flow (arrow 14) flows in a longitudinal direction 19 of the carrier plate 4, so that a flow direction 20 of the first air volume flow (arrow 14) runs parallel to the longitudinal direction 19 of the carrier plate 4. At a distance from the air distribution box 10, positioned in the longitudinal direction 19 of the carrier plate 4 at a distance 35 of 800 mm, there is a disinfection device 21, by means of which at least part of a mixed air volume flow formed from the first air volume flow and from induced room air (which flows into the said ceiling gap from the sides) can be disinfected by means of UV-C radiation. The distance 35 is measured between the first air outlet cross-section 13 and an inlet cross-section 36 of the disinfection device 21.

The disinfection device 21 has a support element 22 for a UV-C radiation source 23, which in the present example is formed by a row of LED lights. The wavelength of the emitted UV-C light is 260 nm. The support element 22 is formed by a sheet whose width corresponds approximately to the width 7 of the carrier plate 4 and is thus elongated. Accordingly, the support element 22 extends transversely to the flow direction 20 of the first air volume flow. A support element 24 is arranged at each end of the support element 22, which in the present case is designed in the manner of a folded edge or like side plates. This results in a kind of bridge as a support system for the UV-C radiation source 23, so that between the support element 22 and the carrier plate 4 there is a free space corresponding to a clear distance 25 between a radiation surface of the UV-C radiation source and the carrier plate 4, through which the mixed air volume flow can flow, being penetrated and disinfected by the UV-C radiation. The UV-C radiation is in the Figure 1 symbolized by arrows 26. The clear distance 25 between the radiation surface of the UV-C radiation source and the carrier plate 4 is 17 cm, but can vary between 10 cm and 25 cm depending on the application.

In the Figure 1 it can be seen that the first air volume flow (arrow 14) introduced by means of the nozzles 16 induces room air, so that this is carried along with the flow of the first air volume flow and is also captured and disinfected by the UV-C radiation. The room air is in the Figure 1 symbolized by the arrows 34.

The device 1 according to the Figures 1 and 2 may optionally comprise a heat exchanger device 27, which is shown for illustrative purposes in the Figure 2 The heat exchanger device 27 has pipes 28 which run in a thermally coupled manner on the carrier plate 4 and through which a liquid heat transfer medium, preferably water, can flow.

In the Figure 2 it can be seen that the air distribution head 10 of the device 1 has a second air outlet cross-section 29, through which a second air volume flow is emitted in such a way that, after it has penetrated the carrier plate 4, it clings to the carrier plate 4 from below and flows parallel to the carrier plate 4. The second air volume flow is in the Figure 2 illustrated with an arrow 30. The carrier plate 4 is provided with a plurality of perforations, which cannot be seen in the figures, which form the second air outlet cross-section 29 in the area of the air distribution box 10. A guide plate 31 can be located inside the air distribution box 10, by means of which the second air volume flow is given the desired direction - namely approximately horizontally. The guide plate 31 is provided in such a way that it reduces its distance from the carrier plate 4 to zero when viewed in the flow direction of the second air volume flow. It is understood that the guide plate 31 has a width which corresponds to the width 18 of the air distribution box 10.

The volume flows that can be achieved with device 1 are given as examples. A primary air volume flow of 100 m ³ /h, for example, is divided into a first air volume flow of 25 m ³ /h leaving the nozzles and a second air volume flow of 75 m ³ /h penetrating the carrier plate downwards. The first air volume flow of 25 m ³ /h induces room air (secondary air) of 225 m ³ /h, which results in a mixed air volume flow of 25 m ³ /h + 225 m ³ /h = 250 m ³ /h flowing through the disinfection device.

In the present embodiment, the second air volume flow penetrates the carrier plate 4. However, it is alternatively also conceivable that the second air outlet cross-section is designed differently and is arranged, for example, such that the second air volume flow already flows out below the carrier plate 4.

In the Figure 3 is shown an example of a device which does not fall under the invention, which, in contrast to the device 1 according to Figure 1 is not connected to a central ventilation system. The basic structure of a ceiling sail 5 with support plate 4, disinfection device 21 and optional heat exchanger device 27 corresponds to the structure of the device 1 according to Figure 1 agree.

The device 1 according to this example, which does not fall under the invention, has a circulating air blower 32 in the form of several fans arranged next to one another in the transverse direction of the carrier plate 4, with which circulating air or room air 34 is sucked in and released. In front of the circulating air blower 32 there is an elongated guide plate 33 which extends transversely of the carrier plate 4 and divides an air outlet cross-section of the circulating air blower into a first air outlet cross-section 13 arranged above the guide plate 33 and a second air outlet cross-section 29 arranged below the guide plate 33. The circulating air that leaves the circulating air fan via the first air outlet cross-section 13, i.e. above the guide plate 33, forms the first air volume flow (arrow 14) that flows in the ceiling gap 15 between the building ceiling 3 and the support plate 4 and is disinfected via the disinfection device 21. This first air volume flow also has the shape of a rectangle or a trapezoid in cross-section.

The circulating air, which flows beneath the guide plate 33 and is guided by it, forms the second air volume flow (arrow 30), which passes beneath the carrier plate 4 and clings to it from below and flows parallel to it.

The circulating air fan 32 is placed on the carrier plate 4, whereby the carrier plate 4 as a whole is provided with a large number of perforations (perforated sheet) that cannot be seen in the figure. The second air volume flow (arrow 30) can reach under the carrier plate 4 via the perforations.

Finally, the Figure 4 the room 2, which is equipped with several devices 1 according to the invention in the form of ceiling sails. Two of the three devices 1, the two outer ones, are provided with a disinfection device according to the invention and are connected to a central supply air system and are analogous to the devices shown in the Figures 1 and 2 shown devices 1. The central device 1, on the other hand, is designed as a device (ceiling sail) with a static cooling/heating function and without active air flow and also without a disinfection device. Due to the large mixed air volume flows in the two outer devices 1, a disinfection function in the middle ceiling sail is not necessary.

List of reference symbols

1

contraption

2

Space

3

Building ceiling

4

Carrier plate

5

Ceiling sail

6

length

7

Width

8th

Upstand

9

Height

10

Air distribution box

11

Supply air line

12

Arrow

13

First air outlet cross-section

14

Arrow (First air volume flow)

15

Ceiling gap

16

jet

17

Housing

18

Width air distribution box

19

Longitudinal direction of carrier plate

20

Flow direction of first air volume flow

21

Disinfection device

22

Supporting element

23

UV-C radiation source

24

Support element

25

Light distance

26

Arrow

27

Heat exchanger device

28

Pipelines

29

Second air outlet cross-section

30

Arrow (second air volume flow)

31

Baffle

32

Recirculation fan

33

Baffle

34

Arrow (room air)

35

Distance

36

Inlet cross-section

Claims (11)

1. A device (1) for the ventilation and temperature control of a room (2) in a building having at least one building ceiling (3), the device (1) comprising

   - a carrier plate (4),

   - at least one first air outlet cross section (13), which is arranged above the carrier plate (4) and with which a first air volume flow can be guided through a ceiling interstice (15) situated between the building ceiling (3) and the carrier plate (4), and

   - at least one second air outlet cross section (29), from which a second air volume flow can be output such that it can be guided under the carrier plate (4) approximately parallel to the carrier plate (4),

   - an air distribution box (10), which is connected to a central ventilation system and can be fed with primary air,

   characterised by a sterilisation means (21), by means of which at least a portion of the first air volume flow can be sterilised by means of UV-C radiation, wherein at least the portion of the first air volume flow can be directed between a carrying element (22) for at least one UV-C radiation source (23) and the carrier plate (4) or the building ceiling (3) and sterilised there, wherein the air distribution box (10) is arranged on an end face of the carrier plate (4) over the entire length of which the first air volume flow can flow, wherein primary air can be applied to the first air outlet cross section (13) arranged above the carrier plate (4), and secondary air can be induced by means of the primary air exiting from the first air outlet cross section (13), and a mixed volume flow formed from the primary air and the secondary air can be sterilised in the sterilisation means (21).
2. The device according to Claim 1, characterised in that the carrying element (22) is elongate and oriented transversely to a flow direction (20) of the first air volume flow which can be guided above the carrier plate (4) .
3. The device according to Claim 1 or 2, characterised by a heat exchanger (27), which is thermally coupled to the carrier plate (4) and through which a liquid heat transfer medium can flow.
4. The device according to one of Claims 1 to 3, characterised in that the at least one carrying element (22) can be supported on the carrier plate (4) and/or the heat exchanger (27) by means of at least one supporting element (24).
5. The device according to one of Claims 1 to 4, characterised in that the UV-C radiation source (23) has at least one UV-C diode by means of which UV-C radiation in a wavelength range between 230 nm and 300 nm, preferably between 250 nm and 280 nm, can be output.
6. The device according to one of Claims 1 to 5, characterised in that the second air volume flow passes through the carrier plate (4), preferably through a perforation in the carrier plate (4).
7. The device according to one of Claims 1 to 6, characterised in that the carrier plate (4) is a perforated metal plate, in particular a perforated metal sheet.
8. The device according to one of Claims 3 to 7, characterised in that the heat exchanger (27) has at least one tube portion which is arranged in a serpentine or harp shape, wherein preferably a cross section of the at least one tube portion is flattened, in particular oval, and further preferably a flattened side of the at least one tube portion is connected to the carrier plate (4) via a coupling means favouring thermal conduction into the carrier plate (4).
9. The device according to one of Claims 1 to 8, characterised in that the first air outlet cross section (13) arranged above the carrier plate (4) is formed by a plurality of nozzles (16), and/or that the second air outlet cross section (29) is formed by perforations in the carrier plate (4), wherein preferably an air guide plate (31, 33) is arranged above the second air outlet cross section (29), the distance of which air guide plate from the carrier plate (4) decreases in the flow direction, preferably to zero.
10. The device according to one of Claims 1 to 9, characterised in that a distance (35) between the first air outlet cross section (13) and an inlet cross section (36) of the sterilisation means (21) is between 300 mm and 1500 mm, preferably between 400 mm and 1200 mm, further preferably between 500 mm and 1000 mm.
11. The device according to one of Claims 1 to 10, characterised in that a flow cross section of the first air volume flow has the shape of a rectangle, wherein a length of the rectangle is at least 3-4 times a height of the rectangle.

Images