EP2860467A1 - Air outlet - Google Patents

Abstract

The invention relates to a supply air passage (101) comprising a connecting piece (2) for connection to an air supply system and a housing (5) which delimits an air distribution chamber (4), the housing (5) having a horizontally arranged air inlet surface (6), by which air (3) in the air distribution space (4) can be introduced and which is connectable to the nozzle (2), and wherein the air inlet surface (6) perpendicular to a central axis (21) of the nozzle (2) is arranged, wherein the housing (5) further comprises a parallel to the air inlet surface (6) arranged air outlet surface (9) through which the air (3) leaves the air distribution space (4), and the housing (5) is provided with walls (10) which in a are arranged at an acute angle (±) to the air outlet surface (9) and wherein the supply air passage has adjusting means for changing a flow direction of the exiting the air outlet surface of the air from a first position (18) can be converted into a second position (21) or in the opposite direction. In order to further develop the supply air passage (101) in such a way that a quick and easy change of direction of the air (3) flowing out of the supply air passage (101) is possible, wherein the device should have no economic disadvantage, it is provided that in the first position (18 ) of the adjusting means (112, 212, 412) is a closed frame (16) in the distribution space.

Description

introduction

The invention relates to a Zuluftdurchlass consisting of a nozzle for connection to an air supply system and a housing which defines an air distribution space, wherein the housing has a horizontally arranged air inlet surface through which air can be introduced into the air distribution space and which is connectable to the nozzle, and wherein the air inlet surface is arranged perpendicular to a central axis of the nozzle, wherein the housing further comprises an air outlet surface arranged parallel to the air inlet surface through which the air leaves the air distribution space, and the housing is provided with walls which are arranged at an acute angle α to the air outlet surface and wherein the supply air passage has adjusting means for changing a flow direction of the air emerging from the air outlet surface, which can be transferred from a first position to a second position or in the opposite direction.

State of the art

Supply air outlets known in the art and designed as ceiling air outlets for turbulent mixing ventilation typically have a structure in which the air exits turbulently and approximately horizontally from the supply air passage.

The construction of the in the DE 20 2006 007 846 U1 and DE 10 2007 008 019 A1 described Zuluftdurchlässe allows, for example, an approximately horizontal outflow of air. For this purpose, the supply air passage on an air inlet surface, an air outlet surface and four sloping walls. The walls are arranged at an acute angle α to the air outlet surface. Accordingly, the Zuluftdurchlass has a truncated pyramidal housing shape. The arrangement of the walls allows advantageous turbulent mixing ventilation, wherein at an angle α to at most 15 °, the air approximately parallel to the plane formed by the air outlet surface, that is, parallel to, for example, the ceiling plane, a radial orientation from the center of the air outlet surface to the outside towards. Other flow directions can not be achieved with this type of device.

The air outlet described in the G 94 07 938 U1 has a truncated pyramidal housing shape, outside the housing, ie on a side facing away from the housing of a perforated plate guide elements with, for example triangular, rectangular or square base surfaces are arranged, which can influence the flow direction.

One in the DE 28 46 076 shown Mediumablenkvorrichtung has two guide walls, which diverge away from each other. Further, in the medium deflection device is a rotatably mounted Ablenklamelle which can be converted into a first and a second end position. By means of the Ablenklamelle the medium flow can be divided and deflected, the deflection is not sufficient and may possibly lead to an increase in the flow velocity, so that drafts may occur in persons located in a room.

The DE 43 06 761 C1 describes an outlet pipe of an air conditioner in which another pipe is inserted. By means of an annular disc flowing air can be constricted through the pipe. A control disk can change its position with or opposite to a flow direction, so that a desired air flow can be generated.

To change the flow direction of the air emerging from the air outlet surface is in the US 4,163,416 proposed to install arcuate steering devices in front of openings of the air outlet surface. The arcuate steering devices can each be aligned separately. As a result, it is possible to discharge the air in a desired direction to the left or right of the arcuate steering means. If the steering device is positioned so that the air can flow out on both sides of the steering device, the escaping air is turbulent. A disadvantage of this device is the time-consuming process for changing the steering devices, which must be aligned manually and separately from each other. The construction and production of the steering devices are also complicated and expensive.

Another Zuluftdurchlass, which allows a variable adjustment of the flow direction, is in the GB 903,225 described. Within a housing of the Zuluftdurchlasses are four flaps, which have a pyramid-shaped arrangement in a fully opened state of the Zuluftdurchlasses. The flaps can each be closed separately by folding them down. The air is deflected in this way in different directions. This construction allows attachment of the air passage in an area of the ceiling which is adjacent to a wall. In this area, unwanted flow characteristics can be avoided by the deflection of the air. The orientation of the steering device is accordingly made during installation. Later changes of Flow equipment must be carried out manually and directly at the supply air passage. Since this process is very expensive, the flow direction can only be changed by skilled personnel and not by any person in the room.

task

The device has the object of constructing a supply air passage so that a quick and easy change of direction of the outflow of air from the Zuluftdurchlass is possible, the device should have no economic disadvantage.

solution

Starting from an outlet of the type described above, this object is achieved in that is located in the first position of the adjusting a frame in the air distribution space.

The frame, which is preferably oriented horizontally, is located in the first position in the shortest possible distance to the air outlet surface in the air distribution space and directs the air which is introduced via the nozzle into the air distribution space, vertically out of the latter. Since the frame in its first position at its upper end is preferably arranged such that no air can flow along the walls and at its lower end is approximately in contact with the air outlet surface, the air can flow only vertically from the Zuluftdurchlass. However, if the frame is in its second position, the air nestles against the inclined walls and flows approximately horizontally out of the supply air passage.

The frame preferably has a square, rectangular or round shape.

In the first position of the adjusting means, it is possible to generate an at least substantially vertical flow direction. This vertical flow direction is particularly advantageous if the room is to be heated. Since warm air rises or stays there, it would not make sense to let the warm air flow horizontally into the room. The vertical flow direction allows a large penetration depth of the supply air, that is, a rapid transport of warm air in a lower area of the room in which usually the persons reside, and thus a good induction. The warm air mixes thoroughly with the air in the room and accordingly the temperature rises in one Floor area of the room, so that an excessive temperature stratification is substantially avoided.

In the case of cooling, the adjusting means can be transferred to the second position, wherein according to the invention it is preferred that the at least one guide element is also arranged in the second position in the air distribution space. The arrangement of the adjusting means in the second position is selected such that the arrangement of the walls favors an approximately horizontal and turbulent flow from the air outlet surface or the air distribution space under the ceiling, so that a good induction effect can be achieved. Since the warm air, which is located in the room rises and the cooler air sinks down, there is a good mixing of the cooler and warm air instead. The horizontal outflow direction favors a large "range" of the supply air flow. A vertical flow direction of the cold air into the room would possibly lead to drafts, which may be perceived by the people in the room as disturbing under certain circumstances. In order to use adjusting means for both the cooling and the heating case, it is provided that the air flows in the first position of the adjusting vertically and in the second position approximately horizontally from the air outlet surface. In the first position, the adjusting means prevent the air from hugging the walls of the air distribution space, thus causing the air to flow in an approximately horizontal direction. Rather, the adjusting means are arranged so that the air is blown substantially perpendicularly out of the feed passage. In contrast, in the second position, the adjusting means are aligned so that the air readily flows horizontally along the walls from the supply air passage. In both cases, the turbulent flow causes good mixing with the air already present in the room.

The invention further ausgestaltend is provided that the effective air outlet surface is reduced in size, when the adjusting means are transferred from the second position to the first position. For the purposes of the present application, the air outlet surface describes a horizontal surface, which is bounded by the walls, wherein the boundary is in each case by a lower edge of the wall facing away from the air inlet surface. If the adjusting means are in the second position, the effective air outlet surface corresponds to the air outlet surface. In the first position, the effective air outlet area is smaller than in the second position, which is due to the fact that the adjusting means limit or reduce the effective air outlet surface by their changed arrangement. In the event that the adjusting means different Assume intermediate positions, the effective air outlet surface is seen from the second position from ever smaller.

In a particularly advantageous embodiment of the invention, it is provided that the adjusting means consist of the at least one guide element and / or at least one bearing element and / or at least one drive element. Here, the task of the at least one guide element is that air is conducted in the desired direction and preferably the effective air outlet surface is variable, so as to achieve a good induction effect and Ausströmcharakteristik. By means of the bearing elements, the guide elements are attached to the supply air passage, preferably to the housing, wherein the storage elements allow a desired movement of the guide elements. The drive elements cause the movements of the guide elements, so that they can be transferred from the first position to the second position or in any intermediate position, this process also in the reverse direction from the second position, the first position is possible. Preferably, the drive elements are arranged in the neck and / or inside and / or outside of the housing.

In one embodiment of the device according to the invention it is provided that a part of the housing is a transition piece which is arranged between the walls and the nozzle, wherein its cross-sectional area perpendicular to the flow direction is greater than the cross-sectional area of the nozzle, wherein the transition from the nozzle to the Transition piece preferably has a sudden change in the cross section. About the nozzle, which is in connection with the air supply system, the air is passed through the air inlet opening in the air distribution space. The air distribution space is preferably limited by a transition piece and walls, wherein the wall are arranged at an acute angle α to the air outlet opening and the angle α is preferably between 3 ° and 25 °. The sudden expansion of the nozzle on the transition piece on the one hand facilitates the homogenization of the flow and on the other hand, the flow of the air in such a way that an optimal mixing ventilation and an optimal outlet direction of the air are reached from the Zuluftdurchlass.

In addition, it is advantageous for the outflow characteristic of the supply air passage that the at least one guide element is preferably in an air outlet space in the first position, wherein the at least one guide element is preferably located in the transition piece in the second position. The air outlet space is of the oblique walls, the air outlet surface and a plane arranged parallel thereto, which in the Transition region between the transition piece and the walls is limited. In the first position, the at least one guide element is located in this air outlet space and is advantageously arranged on the air outlet surface or at a small distance therefrom. If the at least one guide element is transferred from the first position to the second position, the distance between the at least one guide element and the air outlet surface increases and the at least one guide element is finally located in the transition piece. Alternatively, the at least one guide element is further arranged in the air outlet space and is applied to the walls. The induction effect of the air is not affected. Preferably, a further alternative provides that the guide elements are in the first position in the transition piece and in the second position in the air outlet space.

A particularly advantageous embodiment of the invention provides that the preferably horizontally oriented frame has four vertically arranged strip-shaped frame legs.

It is possible that the supply air passage has an arcuate neck for reasons of space. This has the disadvantage that the air does not flow perpendicularly but obliquely into the air inlet space and thus a displacement of the flow direction from the air outlet surface to one side can occur. In order to prevent this, it is particularly advantageous that at least one further frame is arranged in a nested manner in the frame. The further frame deflects the air flowing obliquely into the air distribution space perpendicularly from the air outlet surface into the space and thus prevents an increased flow of air to one side.

Alternatively, it is advantageous for a honeycomb structure to be arranged in the frame and / or, if present, in the further frame, which directs the flow direction of the air emerging from the air outlet surface vertically downward and thus prevents the air from being directed in one direction.

In a further alternative embodiment, it is provided that the at least one guide element has at least one adjustable flap, preferably four adjustable flaps, wherein preferably the at least one flap is arranged in a transition region between the transition piece and the wall. In the case of four flaps these form the closed frame in the first position and are preferably in the second position on the wall. The frame formed in the first position reduces the effective air outlet area and prevents the air from flowing along the walls. Rather, the air is blown vertically downwards. The Guide elements are rotatably supported by bearing elements in the transition region. In the second position, the flaps are preferably applied against the walls and thus hinder the almost horizontally flowing air no longer. The supply air passage behaves as if there were no internals in the interior of the housing.

Furthermore, it is particularly advantageous if the air outlet surface has an air-permeable plate, preferably a perforated plate, which is preferably attachable to the housing, or that the housing can be placed on the plate, or that the plate is integrally formed with the housing. Typically, the housing is placed on the air-permeable panel and then mounted under the ceiling. Alternatively, however, there is the possibility that the housing is first mounted under the ceiling and then the plate is mounted on the housing. Optionally, the plate may be formed integrally with the housing.

Finally, it is provided that the drive elements consist of a manual drive, an electric drive and / or a thermal Dehnstoffantrieb. Thus, the guide elements can be converted into different positions without much effort. By means of these drive elements, the guide elements need not be changed directly in the housing itself, but is a change from a distance, for example by means of a remote control, feasible. This has the advantage that no specialist personnel is required for the adjustment, but that any person in the room can change the direction of the air emerging from the supply air passage.

embodiments

The invention described above will be explained in more detail with reference to three embodiments, which are illustrated in the figures.

Fig. 1:

einen Vertikalschnitt eines erfindungsgemäßen Zuluftdurchlasses in einer ersten Ausführungsform, wobei sich Verstellmittel in einer ersten Stellung befinden,

Fig. 2:

einen Vertikalschnitt eines erfindungsgemäßen Zuluftdurchlasses gemäß Figur 1, wobei die Verstellmittel in einer zweiten Stellung angeordnet sind,

Fig. 3:

eine Draufsicht eines erfindungsgemäßen Zuluftdurchlasses gemäß Figur 1,

Fig. 4:

eine Ansicht eines erfindungsgemäßen Verstellmittels des Zuluftdurchlasses gemäß Figur 1,

Fig. 5:

einen Vertikalschnitt eines erfindungsgemäßen Zuluftdurchlasses in einer zweiten Ausführungsform, wobei sich die Verstellmittel in einer ersten Stellung befinden,

Fig. 6:

einen Vertikalschnitt eines erfindungsgemäßen Zuluftdurchlasses gemäß Figur 5, wobei sich die Verstellmittel in einer zweiten Stellung befinden,

Fig. 7:

einen Vertikalschnitt eines erfindungsgemäßen Zuluftdurchlasses in einer vierten Ausführungsform, wobei sich die Verstellmittel in einer ersten Stellung befinden und

Fig. 8:

einen Ausschnitt einer Wabenstruktur.

It shows:

Fig. 1:

4 a vertical section of a supply air passage according to the invention in a first embodiment, wherein adjusting means are in a first position,

Fig. 2:

a vertical section of a supply passage according to the invention according to FIG. 1 wherein the adjusting means are arranged in a second position,

3:

a plan view of a supply passage according to the invention according to FIG. 1 .

4:

a view of an adjusting means according to the invention of Zuluftdurchlasses according to FIG. 1 .

Fig. 5:

4 a vertical section of a supply passage according to the invention in a second embodiment, wherein the adjustment means are in a first position,

Fig. 6:

a vertical section of a supply passage according to the invention according to FIG. 5 , wherein the adjusting means are in a second position,

Fig. 7:

a vertical section of a supply passage according to the invention in a fourth embodiment, wherein the adjusting means are in a first position and

Fig. 8:

a section of a honeycomb structure.

The FIG. 1 shows a vertical section of a supply air passage 101 according to the invention . The supply air passage 101 comprises a nozzle 2 and a housing 5, wherein the nozzle 2 air 3 from an air supply system, not shown in an air distribution chamber 4 passes and the housing 5, the air distribution space 4 limited. First, the air 3 passes through an air inlet surface 6 of the air distribution chamber 4 before it flows through a transition piece 7 and an air outlet space 8 , in order subsequently to leave the air distribution space 4 through an air outlet surface 9 .

The air inlet surface 6 is formed by a horizontal plane, which is located between the nozzle 2 and the transition piece 7 . Furthermore, 7 four obliquely arranged walls 10 are attached to a lower end of the transition piece. In this embodiment, the walls 10 form with the air outlet surface 9 an acute angle α of 5 °. In other embodiments, not shown here, the angle between the walls and the air outlet surface is preferably between 3 ° and 25 °. Consequently, the air outlet space 8 is formed in the shape of a truncated pyramid. The air outlet surface 9 is a plane arranged horizontally and parallel to the air inlet surface 6 , which consists of an air-permeable plate 11, for example a perforated perforated metal plate. During assembly of the supply passage 101, this is first placed on the plate 11 and then attached to the plate 11 under the ceiling. But it is also possible to attach the supply air passage 101 to a ceiling supporting structure and connect the supply side and only then the plate 11 from below to the housing 5, for example by means of magnets to attach.

Furthermore, the FIG. 1 can be seen that are in the air distribution space 4 and in the nozzle 2 adjustment means 112 for changing the air outlet direction. These adjusting means 112 are composed of a guide element 113, a storage element and a drive element 114 together. The drive element 114 is in this embodiment in the nozzle 2 and has an electric drive. In an embodiment not shown here, the drive element 114 consists of a thermal expansion material drive. The bearing element supports the guide element 113 movably in the supply air passage 101, in particular in the housing 5. In the present case, the bearing element consists of a bushing or sleeve, not shown in the drawing, which guides a connecting rod 15 connecting the guide element 113 to the drive element 114 . The guide element 113 consists in this embodiment of a frame 16, said frame 16 four vertically arranged strip-shaped frame legs 17 according to FIG. 4 having.

The adjusting means 112 for air adjustment are located in FIG. 1 in a first position 18. In the first position 18 , the air 3 is directed vertically from the air supply system via the supply air passage 101 in a space 19 to be ventilated. This is especially advantageous if warm air is to flow into the space 19 . If the guide element 113 is in the first position 18, it is arranged in the air outlet space 8 of the housing 5 . In this way, the guide element 113 adjoins an effective air outlet surface 120 , which is a centrally arranged rectangular section of the air outlet surface 9 . The four frame legs 17 adjoin the transition piece 7 and thus prevent air 3 from flowing along the walls 10 . As a result, the air 3 is now almost vertically blown out of the supply air passage 101 .

The FIG. 2 shows the supply air passage 101 according to FIG. 1 wherein the adjusting means 112 are arranged in a second position 21 . The guide element was transferred by means of the drive elements 114 from the first position 18 to the second position 21 . In the second position 21 , the guide element 113 is in the transition piece 7, whereby the effective air outlet surface 120 is increased and finally the air outlet surface 9 corresponds. As a result, the air 3 no longer flows down vertically, but clings to the sloping walls 10 and, after exiting the supply air passage 101, flows in an approximately horizontal direction along the ceiling (Coanda Effect).

The FIG. 3 shows a plan view of the supply passage 101 according to FIG. 1 , This plan view shows that the nozzle 2 has a round cross-section. Both the transition piece 7 and the air outlet space 8 are square in the cross-sectional area parallel to the air outlet surface. A central axis 22 of the nozzle 2 is at the same time the Verstellmittelpunkt the aforementioned cross-sectional areas of the transition piece 7 and Air outlet space 8. The cross-sectional area of the nozzle 2 is smaller than the cross-sectional area of the transition piece 7, wherein the transition is abrupt.

The FIG. 4 shows the adjusting means 112 according to FIG. 1 in a single presentation. The guide element in the form of the frame 16 has the four frame legs 17 and thus limits a square surface. The guide element 113 is connected by means of spokes 23 to the coupling rod 15 and finally to the drive element 114 .

In the FIG. 5 a further supply air passage 201 according to the invention is shown, wherein the adjusting means 212 are arranged in the first position 18 . In this case, the guide element 213 consists of four flaps 24, which form a closed frame 116 . The flaps 24 are rotatably mounted in a transition region 26 between the transition piece 7 and the walls 10 , for example by means of a hinge-like support member 25 . In the first position 18 , the flaps 24 are perpendicular to the air outlet surface 9 and thus frame the effective air outlet surface 120 , since their narrow end faces abut each other over the corner. The flaps 24 prevent as well as in FIG. 1 in that the air 3 can conform to the walls 10 . As a result, the air 3 flows vertically downward out of the effective air outlet surface 120 (heating case).

The FIG. 6 shows the supply passage 201 according to FIG. 5 , wherein the adjusting means 212 are in the second position 21 . The rotatably mounted flaps 24 are applied to the walls 10 and thus allow the air 3 is guided along the walls 10 and approximately horizontally exits the effective air outlet surface 120 (cooling case). The effective air outlet surface 120 corresponds in the second position 21 of the air outlet surface 9. In an embodiment not shown here, the flaps 24 are not applied down to the walls 10 , but folded up to the transition piece 7 .

The FIG. 7 shows a further supply passage 401 according to FIG. 1 , where this in terms of FIG. 1 differs that, in addition to the frame 16, a further frame 30 is arranged in the air outlet space 8 as a guide element 413 of the adjusting means 412 . The further frame 30 is like the frame 16 according to FIG. 4 attached with spokes 23 to the drive member 114 . The frame 16 and the further frame 30 are interleaved and are in the first position 18, in which the air 3 is directed vertically downwards. The arrangement is particularly advantageous when the supply air passage 401 is disposed directly on the arcuate nozzle 2 , since the further frame 30 prevents that there is an unfavorable displacement of the flow of air. 3 comes. In the second position, not shown here, both frames 16, 30 are arranged in the transition piece 7 .

Instead of the further frame 30 , a honeycomb 31 according to FIG. 8 be arranged in the frame 16 so as to better distribute the air 3 . The honeycomb structure 31 can have both a round and a rectangular cross section. Also, a combination of the further frame 30 and the honeycomb 31 is possible.

LIST OF REFERENCE NUMBERS

α

angle

101, 201, 401

supply air

2

Support

3

air

4

air distribution

5

casing

6

Air interface

7

Transition piece

8th

Air outlet space

9

Air outlet area

10

walls

11

plate

112, 212, 412

adjustment

113, 213, 413

vane

114

driving element

15

coupling rod

16, 116

frame

17

frame legs

18

first position

19

room

120

effective air outlet surface

21

second position

22

central axis

23

spoke

24

fold

25

supporting part

26

Transition area

30

frame

31

honeycomb structure

Claims (13)

Supply air passage (101, 201, 401) comprising a connecting piece (2) for connection to an air supply system and a housing (5) which delimits an air distribution space (4), the housing (5) having a horizontally arranged air inlet surface (6), by which air (3) in the air distribution space (4) can be introduced and which is connectable to the nozzle (2), and wherein the air inlet surface (6) perpendicular to a central axis (21) of the nozzle (2) is arranged, wherein the housing (5) further comprises a parallel to the air inlet surface (6) arranged air outlet surface (9) through which the air (3) leaves the air distribution space (4), and the housing (5) is provided with walls (10) which in a acute angle (α) to the air outlet surface (9) are arranged, and wherein the supply air passage adjusting means (112, 212, 412) for changing a flow direction of the air outlet surface (9) emerging from the air (3) from a first St Positioning (18) in a second position (21) or in the reverse direction can be converted, characterized in that in the first position (18) of the adjusting means (112, 212, 412) is a closed frame (16, 116) in the distribution space , Supply air passage (101, 201, 401) according to claim 1, characterized in that the at least one guide element (113, 213, 413) is arranged in a second position (21) in the air distribution space (4). Supply air passage (101, 201, 401) according to claim 1 or 2, characterized in that the air in the first position (18) of the adjusting means (112, 212, 412) is perpendicular and in the second position (21) approximately horizontally from the air outlet surface (120) flows out. Supply air passage (101, 201, 401) according to any one of claims 1 to 3, characterized in that an effective air outlet surface (120) is reduced, when the adjusting means (112, 212, 412) from the second position (21) to the first position (18). Supply air passage (101, 201, 401) according to any one of claims 1 to 4, characterized in that the adjusting means (112, 212, 412) from the at least one guide element (113, 213, 413) and / or at least one storage element and / or at least one drive elements (114) exist. Supply air passage (101, 201, 401) according to one of claims 1 to 5, characterized in that a part of the housing (5) is a transition piece (7) which is arranged between the walls (10) and the neck (2), wherein its cross-sectional area perpendicular to the flow direction is greater than the cross-sectional area of the nozzle (2), wherein the transition from the nozzle (2) to the transition piece (7) preferably has a sudden change in the cross-section. Supply air passage (101, 201, 401) according to one of claims 1 to 6, characterized in that the at least one guide element (113, 213, 413) in the first position (18) is preferably in an air outlet space (8), wherein the at least one guide element (113, 213, 413) in the second position (21) is preferably located in the transition piece (7). Supply air passage (101, 201, 401) according to one of claims 1 to 7, characterized in that the at least one guide element (113, 213, 413) has four vertically arranged strip-shaped frame legs (17). Supply air passage (101, 201, 401) according to any one of claims 1 to 8, characterized in that at least one further frame (30) in the frame (16) is arranged interleaved. Supply air passage (101, 201, 401) according to any one of claims 1 to 9, characterized in that in the frame (16) and / or if present in the further frame (30), a honeycomb structure (31) is arranged. Supply air passage (101, 201, 401) according to one of claims 1 to 6, characterized in that the at least one guide element (113, 213, 413) at least one adjustable flap (24), preferably four adjustable flaps, wherein preferably at least a flap (24) is disposed in a transition region (26) between the transition piece (7) and the wall (10), wherein in the case of four flaps, the flaps (24) in the first position (18) the closed frame (116 ) and further preferably in the second position (21) against the wall (10). Supply air passage (101, 201, 401) according to one of claims 1 to 11, characterized in that the air outlet surface (9) has an air-permeable plate (11), preferably a perforated plate, which is preferably attachable to the housing (5), or that the housing (5) on the plate (11) can be placed or that the plate (11) is formed integrally with the housing (5). Supply air passage (101, 201, 401) according to any one of claims 5 to 12, characterized in that the drive elements (114) consist of a manual drive, an electric drive and / or a thermal Dehnstoffantrieb.

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