EP3477212B1 - Air distribution device and method for ventilating a room - Google Patents

Description

introduction

The invention relates to an air distribution device comprising a housing which delimits an air distribution space, for at least indirect connection to an air supply system, the housing having an air inlet cross section through which supply air can be introduced into the air distribution space, the housing having an air outlet with a horizontally arranged air outlet surface, wherein walls of the air outlet are arranged at an acute angle between 5 ° and 20 ° to the air outlet surface, and the air outlet surface is formed by a perforated ceiling panel, through which a first partial volume flow of the supply air leaves the air outlet and is ventilated along an underside of the ceiling panel into one Room flows, heat exchanger elements being arranged on an upper side of the ceiling panel facing away from the room to be ventilated.

Furthermore, the invention relates to a room of a building with an air distribution device arranged therein.

1. a) Durch einen Lufteintrittsquerschnitt eines Gehäuses wird Zuluft in einen von dem Gehäuse begrenzten Luftverteilraum eingeleitet.
2. b) Ein erster Teilvolumenstrom der Zuluft verlässt den Luftverteilraum über eine horizontal angeordnete von einem perforierten Deckenpaneel gebildete Luftaustrittsfläche eines Luftauslasses, und strömt entlang einer Unterseite des Deckenpaneels der Luftverteilvorrichtung in den zu belüftenden Raum, wobei das Gehäuse den Luftauslass mit der Luftaustrittsfläche aufweist, und Wandungen des Luftauslasses in einem spitzen Winkel zwischen 5° und 22° zu der Luftaustrittsfläche angeordnet sind.

The invention further relates to a method for ventilation of a room in a building by means of an air distribution device, comprising the following method steps:

1. a) Through an air inlet cross section of a housing, supply air is introduced into an air distribution space delimited by the housing.
2. b) A first partial volume flow of the supply air leaves the air distribution space via a horizontally arranged air outlet surface formed by a perforated ceiling panel and flows along an underside of the ceiling panel of the air distribution device into the space to be ventilated, the housing having the air outlet with the air outlet surface and walls of the air outlet are arranged at an acute angle between 5 ° and 22 ° to the air outlet surface.

State of the art

The field of air conditioning technology knows a variety of air distribution devices that are designed to generate a turbulent mixed flow in rooms. The air emerges turbulently and almost horizontally from the air distribution device, with cooling or heating of the air via heat exchanger elements, which are typically flowed through by water as the heat transfer medium and are arranged on the ceiling panel. The inflow of air to the ceiling panel is influenced via the air distribution device.

Suspended ceiling constructions offer the possibility of arranging air distribution devices of the type described at the outset in an intermediate space between the suspended ceiling and the actual room ceiling, the air outlet surface either being in the plane of the suspended ceiling and the ceiling thus being the subject of the air distribution device, or being arranged directly above it is.

The structure of the in the DE 20 2006 007 846 U1 Air distribution device described allows, for example, an approximately horizontal outflow of the supply air. For this purpose, the air distribution device has an air inlet surface, an air outlet surface and four inclined walls. The walls are arranged at an acute angle α to the air outlet surface. Accordingly, the air distribution device has a truncated pyramid-shaped housing. The arrangement of the walls enables advantageous turbulent mixed ventilation, with the air at an angle α of up to a maximum of 15 ° approximately parallel to the plane formed by the air outlet surface, that is to say parallel to, for example, the ceiling plane, radial alignment from the center of the air outlet surface has outside. Other flow directions cannot be achieved with this type of device.

Another air distribution device, which works on the principle of a turbulent mixed air system, is in the DE 10 2007 008 019 A1 described. In this air distribution device, too, it is provided that the supply air does not emerge perpendicular to the ceiling, but instead perforations in a perforated plate are flowed through at an angle which is as flat as possible, so that there is an air flow parallel to the ceiling which induces the room air. This results in a high power density with good thermal comfort. The perforated perforated plate is formed by a ceiling panel of a grid ceiling or wall cladding. The DE 10 2007 008 019 A1 thus discloses an air outlet according to the preamble of claim 1.

To change the flow direction in the DE 10 2013 111 244 A1 Guide elements described in the air distribution device which, in addition to the horizontal outflow direction along a ceiling panel, also enable a vertical outflow direction perpendicular to the ceiling panel. This is particularly useful for heating purposes in order to prevent warm air from collecting under the ceiling panel or vice versa to achieve a great depth of penetration of the warm air into the room. To cool a room, however, the horizontal outflow is below the Ceiling panel desired, because this way a more even distribution of warm and cold air in the room takes place and drafts are avoided. An embodiment of this air distribution device provides heat exchanger elements on the ceiling panel on a side of the ceiling panel facing away from a room, so that the supply air can be cooled or heated.

The air distribution devices mentioned above have the disadvantage that the supply air is not cooled sufficiently, especially on very warm days, in order to create a pleasant room climate.

The DE 10 2010 001 319 A1 describes an air distribution device with a ceiling sail, the air distribution device also leaving the supply air in a direction parallel to the ceiling and flowing into the room. An outflow of the supply air above the ceiling panel is possible in order to cool or heat the supply air by means of pipes arranged in a meandering manner on the ceiling panel. A radial outflow is not desired since it would be necessary to arrange the air outlet centrally in a room. Furthermore, a targeted outflow to a workplace is to be made possible by means of the air outlet, which is why a radial outflow would be disadvantageous. Using this air distribution device, air conditioning of an entire room is only possible to a limited extent, since neither a large-area outflow of the supply air is desired nor possible.

task

It is therefore an object of the present invention to further develop the air distribution device of the type described at the outset and the method for ventilation of a room in such a way that the flow behavior in the room is further optimized, so that the air conditioning of the entire room can be improved.

solution

Starting from the air distribution device of the type described in the introduction, the underlying object is achieved in that at least two nozzles are arranged on the housing above the top of the ceiling panel such that a longitudinal axis of the nozzles is parallel to a longitudinal axis of the ceiling panel and parallel to a surface of the ceiling panel runs, and the respective nozzles are on both sides of an axis of the housing, which runs parallel to a transverse axis of the ceiling panel.

According to the present application, instead of a nozzle, a row of nozzles can also be meant, in which case the longitudinal axes of the respective nozzles of a row of nozzles are preferably arranged parallel to each other. With the help of a row of nozzles, a large quasi-linear outflow can be achieved above the ceiling panel along the heat exchanger elements.

Furthermore, the ceiling panel according to the present application can be a perforated plate on which the housing of the air distribution device is arranged. The ceiling panel should preferably have a much larger area than the air outlet area of the air outlet, so that the second partial volume flow can be passed along a sufficiently large number of heat exchanger elements. According to the present invention, the longitudinal axis of the ceiling panel is arranged parallel to a ceiling in the room. In addition, the ceiling panel according to the present invention has a top and a bottom. The upper side describes a side facing away from a room and thus a side of the ceiling panel facing a ceiling of the room. As a result, a person in the room cannot see the top of the ceiling panel in an assembled state. The underside of the ceiling panel is a side of the ceiling panel that faces the room and is therefore visible.

Because of the arrangement of the heat exchanger elements, the entire ceiling panel can preferably be used for cooling or heating purposes of the first and / or the second partial volume flow in the sense of the present application.

The advantage of the arrangement of the nozzles according to the invention is that the supply air is divided into two partial volume flows and at least one of the two partial volume flows can be cooled or heated by the heat exchanger elements. The first partial volume flow is led out of the air outlet surface of the supply air outlet through the perforated ceiling panel, so that the supply air flows out approximately horizontally along the underside of the ceiling panel due to the Coanda effect and is preferably heated or cooled by it. A radial outflow - based on a center point of the air outlet surface - of the first partial volume flow advantageously takes place. In contrast to this, the second partial volume flow is led out through the nozzles, preferably the rows of nozzles, of the air distribution device, whereby the induction effect of the air distribution device can be further increased. Since the nozzles are not visibly arranged above the ceiling panel, i.e. viewed from the room, the second partial volume flow leaves the air distribution space above the ceiling panel and consequently flows along the heat exchanger elements, which either cool or heat the supply air. Due to the directed air flow, the heat transfer from the heat exchanger elements and / or the ceiling panel to the preferably already preheated and conditioned supply air of the second partial volume flow can be improved. The heat transfer is thus significantly increased by the convective portion of the supply air in comparison with heat exchanger elements that are passive, that is to say not actively flowed through, on the upper side. Due to the flow velocity, a large part of the supply air of the second partial volume flow flows up to edge areas of the ceiling panel. In particular in a cooling case, that is to say when the supply air is cooled by the heat exchanger elements, the supply air “falls” into the room at the edge regions. This has the advantage that any drafts that may occur only occur in the edge areas of the ceiling panel and thus in the room, in which people are not at all or only for a very short moment. The cooled supply air of the second partial volume flow can already flow into the room through the perforations of the ceiling panel, provided these are open. Typically, however, the ceiling panel in an area outside the air outlet surface of the air outlet is preferably covered with a fleece for optical and / or acoustic reasons, so that the second partial volume flow cannot flow through the perforations and thus only flows into the room in the edge regions of the ceiling panel. Since there is then an immediate mixing with the warmer room air, drafts in this area are avoided. A highly inductive mixed ventilation can consequently be achieved by means of the air distribution device according to the invention.

An essential use of the air distribution device according to the invention provides for the cooling of a room in a building, as is necessary today in particular in modern office rooms with good thermal insulation and a fairly high internal heat load over long periods of time within a year. With the help of the air distribution device, cold supply air can be introduced into the room as gently as possible, with sufficient mixing nevertheless taking place with the air in the room. If necessary, the air distribution device can also be used to heat a room by heating the supply air from the heat exchanger elements.

Advantageously, however, for the heating case, adjusting elements can be arranged in the air outlet, which allow a vertical outflow of the first partial volume flow from the air outlet surface. Consequently, the warm supply air can flow as deeply as possible into the room, the supply air in this case preferably being introduced into the air distribution space already warmed up.

An embodiment of the invention advantageously provides that at least one further nozzle is arranged on the housing above the top of the ceiling panel such that a longitudinal axis of the nozzle is perpendicular to the longitudinal axis of the ceiling panel and runs parallel to the surface of the ceiling panel. Because of this arrangement, an approximately radial outflow of the second partial volume flow can also be achieved by means of the nozzles, so that a larger-area mixed ventilation in the room can be achieved.

An energetically economical further development of the invention provides that at least one further nozzle is arranged on the housing above the top of the ceiling panel such that a longitudinal axis of the nozzle is perpendicular to the longitudinal axis of the ceiling panel and perpendicular to the surface of the ceiling panel, an outflow direction of the Supply air from the nozzle is directed away from the ceiling panel. This arrangement of the nozzle or a corresponding row of nozzles causes the second partial volume flow to be directed onto a ceiling of the room and then to be guided along the ceiling of the room. This arrangement is particularly advantageous at night, since the ceiling can be cooled by means of the night air and, due to its large cooling capacity, can be used as a "refrigerant store". The cooled ceiling can then be used during the day to pre-cool or cool the supply air. If the supply air is not adequately cooled using the ceiling, the cooling heat exchanger elements can be used. As a result, this can lead to energy savings, since only hourly use of the heat exchanger elements is possible.

It is advantageously provided according to the invention that the acute angle is between 7 ° and 15 °, since this means that the supply air exits to the outside approximately parallel to the plane formed by the ceiling panel and in a preferably radial exit direction from a center of the air outlet. Adequate mixed ventilation can thus be achieved.

A constructive further development provides that the at least two nozzles are arranged on the air outlet, in particular on a transition piece of the air outlet having a cuboid shape. In this further development, the housing is thus formed by the air outlet. The cuboid shape not only enables simple attachment of the nozzles, but also has walls arranged perpendicular to the ceiling panel, which enable an arrangement of the nozzles according to the invention and thus the outflow direction of the supply air, because a longitudinal axis of the nozzles should be arranged at least parallel to the ceiling panel.

An alternative embodiment of the invention provides that the housing has an air distribution box, the at least two nozzles being arranged on the air distribution box. In this embodiment, the housing of the air distribution device according to the invention is formed by the air distribution box and the air outlet, the Air distribution box is preferably integrally connected to the air outlet. The air distribution space is delimited by the air distribution box, a first area of the air distribution space preferably being arranged outside the air outlet and a second area inside the air outlet. The air inlet surface is now arranged on the air distribution box. The air outlet is thus only indirectly connected to the air supply system, which is why, for example, an inflow funnel of the air outlet can be arranged on the transition piece, which enables a better inflow of the supply air from the first area of the air distribution area into the second area of the air distribution area.

According to the invention, it is provided that a flow path leading to a nozzle can be completely or partially blocked by means of at least one adjustable shut-off element. This has the advantage that the second partial volume flow of the supply air can be regulated. This means that the volume of the supply air leaving the air distribution space above the ceiling panel can be changed using the shut-off device. For this purpose, each individual nozzle can have its own shut-off device. However, it is also conceivable that a shut-off device is assigned to an entire row of nozzles, and thus the entire row of nozzles is covered. Depending on the desired cooling capacity, more or less supply air is emitted above the ceiling panel. For this purpose, the shut-off device can preferably assume various positions between an open position in which a maximum volume flow leaves the air distribution space and a closed position in which no more supply air passes through the corresponding nozzle.

Alternatively, it is also conceivable that the shut-off element regulates the outflow direction of the supply air from the air distribution space above the ceiling panel due to its adjustment. If, for example, in addition to the nozzles that allow the supply air to flow out parallel to the ceiling panel, there are additional nozzles that allow the supply air to flow out toward the ceiling of the room, it is advantageous if the respective shut-off devices are arranged in such a way that they either the nozzles or close rows of nozzles with the outflow direction of the supply air parallel to the ceiling panel or close the nozzles with the outflow direction in the direction of the ceiling of the room. At night, the large cooling capacity of the ceiling can be used for "cold storage" by blowing in cool nighttime outside air, while there is no need for outflow of the supply air along the heat exchanger elements at night. Consequently, it would be advantageous to close the nozzles, which allow the supply air to flow out parallel to the ceiling panel, with the respective shut-off elements. During the day, the air can be pre-cooled or cooled by flowing along the ceiling, which is why Now the nozzles allow the supply air to flow out towards the ceiling before they are closed later, so that the supply air then flows parallel to the ceiling panel along the heat exchanger elements in order to be actively cooled.

The shut-off element is advantageously designed in the form of a pivotable flap. As a result, the air distribution device according to the invention can be adapted to a wide variety of applications, such as those described above.

It is particularly advantageous for the desired outflow characteristic of the air distribution device if the ceiling panel has perforations or holes which preferably define a free cross section of approximately 13% to 22%, more preferably 16%, of the total perforated or perforated area. The choice of the free cross-section is particularly relevant in the area of the air outlet area, since a supply air flowing out quasi-parallel to the ceiling panel below the ceiling panel, that is to say an approximately horizontal outflow, is desired.

A constructive further development of the invention provides that the ceiling panel is rectangular and / or the air outlet is truncated pyramid. An elongated ceiling panel has the advantage that the supply air can flow along as many heat exchanger elements as possible in the desired outflow direction of the supply air, i.e. parallel to the ceiling panel and parallel to the longitudinal axis of the ceiling panel, in order to increase the transferable power. In particular in the case of the frustopyramidal air outlets, it is possible to arrange a plurality of air distribution devices in a row on the ceiling panel, preferably perpendicular to the longitudinal axis of the ceiling panel. This enables - in the manner of a modular system - a room-specific adaptation of the air distribution device or air distribution devices on a ceiling panel or several ceiling panels in any room.

It has been found that according to the present invention, depending on the width of the ceiling panel, a plurality of air distribution devices can be arranged next to one another in order to maintain the previously described positive flow conditions over the entire width of the ceiling panel. As a result, multiple air distribution devices can be associated with a single ceiling sail.

Alternatively, a further development in the construction of the air distribution device provides that the ceiling panel is rectangular and the air outlet is elongated in the floor plan. A longitudinal axis of the elongated air distribution device is arranged perpendicular to the longitudinal axis of the ceiling panel. Due to the elongated shape of the air distribution device, it is sufficient if only one air distribution device on the Ceiling panel is arranged in order to achieve a sufficiently large top of the ceiling panel overflowed with supply air. Furthermore, the elongated shape has the advantage that there is no mutual hindrance to the supply air volume flows, as can be the case with side-by-side air distribution devices.

In order to prevent the mutual obstruction of the first partial volume flows of the supply air of adjacent air distribution spaces, it can be advantageous if at least one cover element is arranged in the interior of the air distribution space, which can change an outflow characteristic for a partial area of the air outlet surface of the air outlet. The at least one cover element is preferably fastened to the ceiling panel in the region of the air outlet surface, preferably glued thereon.

So that there is no mutual obstruction of the second partial volume flows of the respective air distribution spaces, shut-off elements for closing the corresponding nozzles can be arranged on the mutually aligned nozzles, or nozzles arranged in this way can be dispensed with entirely.

The heat exchanger elements are advantageously tubes or channels which are arranged in a meandering shape on the ceiling panel. The tubes are preferably each connected to a water supply system, so that a continuous flow through the tubes by means of a fluid, preferably water, is made possible. The supply of the fluid into the tubes can advantageously be regulated as required. The tubes are advantageously arranged on both sides of the longitudinal axis of the ceiling panel, more preferably on both sides of a transverse axis of the ceiling panel, in a meandering manner on the latter.

Furthermore, according to the invention, a room of a building with at least one air distribution device according to one of claims 1 to 12 is provided, the ceiling panel being designed in the form of a ceiling sail and being freely visible in the room. It is not necessary to completely cover the ceiling of a room with one or more ceiling panels.

Furthermore, the underlying object is achieved, based on the method of the type described at the outset, by the following method step:
c) In a position of use of the air distribution device, a second partial volume flow of the supply air flows out of the air distribution space via at least two nozzles arranged on the housing, the second partial volume flow above one provided with heat exchanger elements Top of the ceiling panel, parallel to a longitudinal axis of the ceiling panel and on both sides of an axis of the housing, which is arranged parallel to a transverse axis of the ceiling panel, and thus flows out along the heat exchanger elements.

The method according to the invention is particularly suitable for introducing cooled supply air into a room, because the second partial volume flow of the supply air flowing out through the nozzles is conducted along the cooling heat exchanger elements and thus cooled. Part of the cooled supply air can penetrate into the room through the perforated ceiling panel, and another part of the cooled supply air "falls" into the room in an edge area of the ceiling panel and mixes there with the room air. Typically, however, the entire partial volume flow flows up to an edge area of the ceiling panel and does not penetrate through the perforations into the space of the ceiling panel, because a fleece is preferably arranged in the area outside the air outlet area of the air outlet for acoustic and / or optical reasons on the ceiling panel.

If necessary, the supply air can also be heated using the heat exchanger elements before it flows into the room.

A further development of the method provides that in a second position of use of the air distribution device, the second partial volume flow is led out of the air distribution space by means of further nozzles located on the housing in a direction running approximately perpendicular to the ceiling panel and parallel to a central axis of the housing, so that the second Partial volume flow flows along a ceiling of the room.

This further development according to the invention offers the essential advantage that the cooling effect of a ceiling of the room can be used to cool the supply air after the ceiling has previously been cooled with cool night air during the night.

Shut-off devices within the housing that close the nozzles in such a way that either the supply air flows out along the heat exchanger elements or along the ceiling have proven to be particularly advantageous. In particular at night, the nozzles that allow the supply air to flow out along the heat exchanger elements can be closed, so that the cool night air flows along the ceiling and cools it down. During the day, the cooled ceiling can be used to cool the room air. Should the cooling be insufficient Supply air using the ceiling is more possible, the supply air can either flow from the ceiling along part of the heat exchanger elements now in use or the at least one shut-off device closes the nozzles that direct the supply air to the ceiling, thus opening the nozzles that direct the supply air along the cooling heat exchanger elements.

Finally, it should be noted that the different features of the subclaims can each be implemented individually or in groups in any combination in variants of the invention.

embodiments

Fig. 1:

eine Seitenansicht einer erfindungsgemäßen Luftverteilvorrichtung in einer ersten Ausführungsform,

Fig. 2:

eine Draufsicht der erfindungsgemäßen Luftverteilvorrichtung gemäß Figur 1,

Fig. 3:

eine Draufsicht einer erfindungsgemäßen Luftverteilvorrichtung gemäß einer zweiten Ausführungsform,

Fig. 4:

eine Draufsicht eines Raumes in einem Gebäude, in dem drei der erfindungsgemäßen Luftverteilvorrichtungen gemäß Figur 3 angeordnet sind,

Fig. 5:

eine Seitenansicht einer erfindungsgemäßen Luftverteilvorrichtung in einer dritten Ausführungsform,

Fig. 6:

eine Draufsicht eines Deckenpaneel mit darauf angeordneten Luftverteilvorrichtungen in einer vierten Ausführungsform,

Fig. 7:

eine Draufsicht des Deckenpaneels gemäß Figur 6, wobei die Luftverteilvorrichtungen entfernt wurden, und

Fig. 8:

eine Seitenansicht einer erfindungsgemäßen Luftverteilvorrichtung in einer fünften Ausführungsform.

The invention described above is explained in more detail below on the basis of a number of exemplary embodiments which are illustrated in the figures. It shows:

Fig. 1:

a side view of an air distribution device according to the invention in a first embodiment,

Fig. 2:

a plan view of the air distribution device according to the invention Figure 1 .

Fig. 3:

a plan view of an air distribution device according to the invention according to a second embodiment,

Fig. 4:

a plan view of a room in a building in which three of the air distribution devices according to the invention Figure 3 are arranged

Fig. 5:

a side view of an air distribution device according to the invention in a third embodiment,

Fig. 6:

4 shows a plan view of a ceiling panel with air distribution devices arranged thereon in a fourth embodiment,

Fig. 7:

a plan view of the ceiling panel according to Figure 6 , with the air diffusers removed, and

Fig. 8:

a side view of an air distribution device according to the invention in a fifth embodiment.

In the embodiments shown below, structurally identical components and components having the same effect are provided with the same reference symbols. For the sake of clarity, not every component which is repeated in the figures is identified again in every figure.

The Figure 1 shows a side view and the Figure 2 a plan view of a first embodiment of an air distribution device 1 according to the invention comprising a housing 2. On the housing 2 , a nozzle 3 is arranged for indirect connection to an air supply system 4 . Via an air inlet cross-section 5 , supply air (arrow 6 ) from the air supply system 4 is introduced into an air distribution space 7, which is delimited by the housing 2 . In the example shown, the air inlet cross section 5 is advantageously oriented perpendicular to a central axis 21 of the housing 2 . As a result, the supply air is introduced into the housing 2 in a direction parallel to the central axis 21 . The housing 2 has an air outlet 8 with a horizontally arranged air outlet surface 9 , the air outlet surface 9 being formed by a perforated ceiling panel 10 . The "horizontal orientation" of the air outlet surface 9 is based on a typical arrangement of the air distribution device 1 according to the invention on or in a ceiling of a room. The air outlet surface 9 is particularly preferably oriented perpendicular to the central axis 21 of the housing 2 and therefore parallel to the air inlet cross section 5 . A first partial volume flow (arrow 11 ) leaves the air distribution space 7 via the air outlet surface 9 in an approximately horizontal direction, that is to say parallel to the air outlet surface 9 , so that the first partial volume flow (arrow 11 ) flows into a space 12 along an underside 42 of the ceiling panel 10 . In the example shown, the first partial volume flow of the supply air is consequently diverted from the nozzle 3 by approximately 90 °. This slight deflection is advantageous insofar as a flow resistance of the air distribution device 1 and consequently an energy consumption caused by the air distribution device 1 are low.

The air outlet 8 is composed of four walls 13, which are arranged at an angle α of 15 ° to the air outlet surface 9 , and a cuboid transition piece 14 . A plurality of nozzles 15 are arranged in two rows 16, 17 on the transition piece 14 , the respective rows 16, 17 being located on both sides of an axis 18 of the housing 2 . The axis 18 of the housing 2 is arranged parallel to a transverse axis 19 of the ceiling element 10 . A longitudinal axis 20 of the respective nozzles 15 is arranged perpendicular to a central axis 21 of the housing 2 and parallel to a longitudinal axis 22 of the ceiling panel 10 . Consequently, a second partial volume flow (arrow 23 ) of the supply air 6 flows out above an upper side 24 of the ceiling panel 10 facing away from the space 12 along the longitudinal axis 22 and parallel to a surface 25 of the ceiling panel 10 .

In addition, further nozzles 26 (in the Figure 2 only shown as arrows) arranged on the transition piece 14 such that a longitudinal axis 30 of these nozzles 26 runs perpendicular to the longitudinal axis 22 of the ceiling panel 10 and parallel to the surface 25 of the ceiling panel 10 . The supply air of the second partial volume flow (arrow 23 ) additionally flows perpendicular to the longitudinal axis 22 of the ceiling panel 10 and parallel and above the surface 25 of the ceiling panel 10 .

On the upper side 24 of the ceiling panel 10 facing away from the room 12 there are also heat exchanger elements 28 in the form of tubes 29 or channels arranged in a meandering shape. A heat transfer medium, for example water, is passed through the pipes 29 , in order in particular to appropriately cool or heat the supply air of the second partial volume flow (arrows 23 ), which flows through the nozzles 15 and the nozzles marked with arrow 26 above the ceiling panel 10 . The tubes 29 are preferably connected to a water supply line system, not shown here.

In the Figure 3 a top view of a second exemplary embodiment of the air distribution device 1 is shown. The housing 2 or the air outlet 8 is elongated and has a plurality of nozzles, not shown here, which are arranged in two rows 16, 17 . The longitudinal axes 20 of the respective nozzles are arranged parallel to the longitudinal axis 22 of the ceiling panel 10 and on both sides of the axis 18 of the air outlet 8 , so that an air flow of the second partial volume flow, indicated by the arrows 23, only parallel to the longitudinal axis 22 above the top 24 of the ceiling panel 10 of the ceiling panel 10 and on both sides of the axis 18 of the housing 2 . The first partial volume flow, not shown here, leaves the air outlet 8 in the horizontal direction through the air outlet surface, not shown here.

The Figure 4 shows a room 12 from above with three air distribution devices 1 arranged next to one another therein . The second partial volume flow (arrows 23 ) leaves the air distribution space (not shown here) via the nozzles (also not shown here) in an approximately horizontal direction along the top side 24 of the respective ceiling panel 10, on both sides Axis 18 of the respective housing 2 and parallel to the longitudinal axis 22 of the respective ceiling panel 10. So that the air flows do not interfere with one another, there is no horizontal outflow of the first and second partial volume flows of the supply air perpendicular to the longitudinal axis of the ceiling panel 10 .

Another alternative embodiment of the air distribution device 1 according to the invention is shown in FIG Figure 5 in a side view. The structure of the air distribution device 1 largely corresponds to the air distribution device 1 according to the exemplary embodiment in FIG Figure 1 , however, further nozzles 31 are arranged in the transition piece 14 , whose longitudinal axis 36 is arranged parallel to the central axis 21 of the housing 2 and perpendicular to the longitudinal axis of the ceiling panel 10 , not shown here are. This results in an outflow direction of the second partial volume flow directed upward at a ceiling 32 of the space 12 (arrow 33 ). In particular at night, the cool night air can be used to cool the ceiling 32 in the room 12 , so that the cooled ceiling 32 can be used during the day to keep the second partial volume flow (arrow 33 ) of the supply air flowing along the ceiling 32 in the course to cool off during the day. Additional cooling of the second partial volume flow by means of the heat exchanger elements 28 would therefore only be necessary when the ceiling 32 is no longer sufficiently cool.

Typically, the cooling capacity of the ceiling 32 is not sufficient to sufficiently cool the supply air over the entire day, which is why the second partial volume flow (arrow 33 ) is then directed again along the cooling heat exchanger elements 28 in order to be actively cooled there. In order to allow the second partial volume flow 23 to be deflected, there are eight shut-off elements 34 in the form of flaps 35 in the transition piece 14 of the air outlet , which either have the nozzles 31 which let the supply air flow out towards the ceiling or the nozzles 15 which one Allow outflow of the supply air along the heat exchanger elements 28 in an approximately horizontal direction, can close. Depending on requirements, the second partial volume flow (arrows 23, 33 ) of the supply air is thus cooled through the ceiling 32 or through the heat exchanger elements 28 .

In the Figure 6 A ceiling panel 10 is shown from an upper side with three air distribution devices 1 arranged next to one another. The structure of the air distribution devices 1 largely corresponds to the structure of the air distribution device 1 according to FIG Figure 1 , However, these air distribution devices 1 have no nozzles which are arranged perpendicular to the longitudinal axis 22 of the ceiling panel 10 and parallel to the axis 18 of the housing 2 . Such nozzles would namely let the supply air of the respective air distribution device 1 flow out into an approximately horizontal and perpendicular to the longitudinal axis 22 of the ceiling panel 10 , so that the volume flows would hinder each other. The resulting flow behavior would not be desirable. If the air distribution devices 1 nevertheless have nozzles oriented in this way, they could be blocked by means of a corresponding shut-off element, so that no supply air can flow out. Furthermore, the heat exchanger elements, which are not shown in the figure, are located on the upper side 24 of the ceiling panel 10 .

The Figure 7 shows the ceiling panel 10 according to Figure 6 , wherein the air distribution devices have been removed so that the air outlet surfaces 9 of the respective air outlets are visible. There are triangular-shaped on the air outlet surfaces 9 Plates 37 which prevent outflow of the first partial volume flow, not shown here, perpendicular to the longitudinal axis 22 of the ceiling panel 10 in an approximately horizontal direction along the underside of the ceiling panel 10 . Because an outflow of the supply air in this direction would lead to a mutual hindrance of the partial volume flows of the respective air distribution devices 1 . As a result, the first partial volume flow of the respective air distribution device 1 is conducted only parallel to the longitudinal axis 22 of the ceiling panel 10 and almost horizontally below the ceiling panel 10 along the underside due to the triangular plates 37 .

Another embodiment of an air distribution device 1 is shown in FIG Figure 8 shown. The housing 2 comprises the air outlet 8 and an air distribution box 38, in which the air outlet 8 is arranged, wherein the air outlet 8 and the air distribution box 38 are made in one piece. The air inlet cross section 5 is now arranged on the air distribution box 38 . Via the air inlet cross section 5 , the supply air is directed from the air supply system, not shown here, into a first area 39 of the air distribution space 7 . The first partial volume flow (arrow 11) is introduced via an inflow funnel 40 from the first area 39 into a second area 41 of the air distribution space 7 and leaves the air outlet 8 via the horizontally arranged air outlet surface 9. The second partial volume flow (arrow 23 ) is from the first area 39 of the air distribution space 7 out through nozzles 15 along the top 24 of the ceiling panel 10 . The nozzles 15 are arranged on the air distribution box 38 of the housing 2 , a longitudinal axis 20 of the nozzles 15 being arranged parallel to the longitudinal axis of the ceiling panel 10 ( not shown here) and perpendicular to the central axis 21 of the housing 2 .

The housing 2 can be both square and elongated, as was also shown, for example, in the previous exemplary embodiments. Furthermore, in this exemplary embodiment it is also conceivable for nozzles, not shown here, to be arranged above the upper side 24 of the ceiling panel 10 on the housing 2 , the longitudinal axis of which are arranged perpendicular to the longitudinal axis of the ceiling panel 10 and perpendicular to the central axis 21 of the housing, and / or are arranged parallel to the central axis of the housing 2 and perpendicular to the longitudinal axis of the ceiling panel 10 .

Reference list

1

Air distribution device

2

casing

3

Support

4

Air supply system

5

Air intake cross section

6

Supply air

7

Air distribution space

8th

Air outlet

9

Air outlet area

10

Ceiling panel

11

first partial volume flow

12th

room

13

Wall

14

Transition piece

15

Nozzles

16

line

17

line

18th

Axis of the housing

19

Transverse axis

20th

Longitudinal axis of the nozzles

21

Central axis of the housing

22

Longitudinal axis of the ceiling panel

23

second partial volume flow

24

Top

25

surface

26

jet

27

longitudinal axis

28

Heat exchanger element

29

Tube

30

longitudinal axis

31

Nozzles

32

blanket

33

arrow

34

Shut-off device

35

flap

36

Longitudinal axis nozzles

37

plate

38

Air distribution box

39

first area air distribution box

40

Inflow funnel

41

second area

42

bottom

α

angle

Claims (15)

1. An air distribution device (1) comprising a housing (2), which delimits an air distribution chamber (7), for at least indirect connection to an air supply system, the housing (2) having an air-inlet cross section (5), through which supply air (6) can be introduced into the air distribution chamber (7), the housing (2) having an air outlet (8) with a horizontally arranged air outlet surface (9), walls (13) of the air outlet (8) being arranged at an acute angle (α) of between 5° and 22° to the air outlet surface (9) and the air outlet surface (9) being formed by a perforated ceiling panel (10), through which a first partial volume flow of the supply air (6) can be conducted to the air outlet (8) and flow out along an underside (42) of the ceiling panel (10) into a room (12) to be ventilated, characterized in that heat-exchanger elements (28) are arranged on an upper side (24) of the ceiling panel (10) facing away from the room (12) ventilated, wherein at least two nozzles (15) are arranged on the housing (2) above the upper side (24) of the ceiling panel (10) in such a manner that longitudinal axes (20) of the nozzles (15) in each case run parallel to a longitudinal axis (22) of the ceiling panel (10) and parallel to an upper surface (25) of the ceiling panel (10) and the nozzles (15) are located on both sides of an axis (18) of the housing (2), wherein the axis (18) runs parallel to a transverse (19) of the ceiling panel (10).
2. The air distribution device (1) according to Claim 1, characterized in that at least one further nozzle (26) is arranged on the housing (2) above the upper side (24) of the ceiling panel (10) in such a manner that a longitudinal axis (27) of the nozzle (26) runs perpendicularly to the longitudinal axis (22) of the ceiling panel (10) and parallel to the surface (25) of the ceiling panel (10).
3. The air distribution device (1) according to Claim 1 or 2, characterized in that at least one further nozzle (31) is arranged on the housing (2) above the upper side (24) of the ceiling panel (10) in such a manner that a longitudinal axis (36) of the nozzle (31) runs perpendicularly to the longitudinal axis (22) of the ceiling panel (10) and perpendicularly to the surface (25) of the ceiling panel (10), wherein an outflow direction of the supply air from the nozzle (25) is directed away from the ceiling panel (10).
4. The air distribution device (1) according to one of Claims 1 to 3, characterized in that the air-inlet cross section (5) is orientated parallel to the air outlet surface (9).
5. The air distribution device (1) according to one of Claims 1 to 4, characterized in that the at least two nozzles (15) are arranged on the air outlet (8), particularly on a transition piece (14) of the air outlet (8) having a cuboidal shape.
6. The air distribution device (1) according to one of Claims 1 to 4, characterized in that the housing (2) has an air distribution box (38), wherein the at least two nozzles (15) are arranged on the air distribution box (38).
7. The air distribution device (1) according to one of Claims 1 to 6, characterized in that a flow path leading to a nozzle (15) can be blocked entirely or partially by means of at least one adjustable shut-off valve (34).
8. The air distribution device (1) according to Claim 7, characterized in that the shut-off valve (34) is constructed in the form of a pivotable butterfly valve (35) .
9. The air distribution device (1) according to one of Claims 1 to 8, characterized in that the ceiling panel (10) has perforations or holes, which preferably define a free cross section of approximately 13% to 22%, further preferably 16%, of the perforated or pierced total area.
10. The air distribution device (1) according to one of Claims 1 to 9, characterized in that the air outlet (8) has a truncated-pyramid shape.
11. The air distribution device (1) according to one of Claims 1 to 9, characterized in that the ceiling panel (10) is rectangular and the air outlet (8) is elongated in outline.
12. The air distribution device (1) according to one of Claims 1 to 11, characterized in that the heat-exchanger elements (28) comprise pipes (29), which are arranged in a meandering manner on the ceiling panel (10) .
13. A room (12) of a building having at least one air-distribution device according to one of Claims 1 to 12, wherein the ceiling panel (10) is configured in the form of a ceiling panel and is clearly visible in the room (12).
14. A method for ventilating a room (12) in a building by means of an air-distribution device (1) comprising the following method steps:

    a) supply air (6) is introduced through an air-inlet cross section (5) of a housing (2) into an air-distribution chamber (7) delimited by the housing (2),

    b) a first partial volume flow of the supply air (6) leaves the air distribution chamber (7), flows through a horizontally arranged air outlet surface (9), formed by a perforated ceiling panel (10), of an air outlet (8), and then flows along an underside (42) of the ceiling panel (10) of the air-distribution device (1) into the room (12) to be ventilated, wherein the housing (2) has the air outlet (8) with the air-outlet surface (9), and walls (13) of the air outlet (8) are arranged at an acute angle (α) of between 5° and 22° to the air outlet surface (9),
    characterized in that

    c) in a use position of the air-distribution device (1), a second partial volume flow of the supply air (6) flows via at least two nozzles (15) arranged on the housing (2) out of the air-distribution chamber (7), wherein the second partial volume flow flows out above an upper side (24) of the ceiling panel (10) provided with heat-exchanger elements (28), parallel to a longitudinal axis (22) of the ceiling panel (10) and on both sides of an axis (18) of the housing (2), which is arranged parallel to a transverse axis (19) of the ceiling panel (10) and thus along the heat-exchanger elements (28).
15. The method according to Claim 14, characterized in that in a second use position of the air-distribution device (1), the second partial volume flow is conducted out of the air-distribution chamber (7) in a direction running approximately perpendicularly to the ceiling panel (10), by means of further nozzles (26) located on the housing (2), and parallel to a central axis (21) of the housing (2), so that the second partial volume flow flows along a ceiling (32) of the room (12).

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