EP4151916A1 - Ventilation device and method for operating a ventilation device - Google Patents

Abstract

The invention relates to a ventilation device (42) and a method for operating a ventilation device for a ventilation and air conditioning system in a building, the ventilation device being able to be arranged on an outer shell (43) of a building, the ventilation device having an outside air inlet (63) for sucking in outside air an outside area (59) and with an exhaust air outlet (61) for blowing out exhaust air into the outside area, the ventilation device having a guiding device (57) with at least one air duct (47) for guiding the exhaust air to the exhaust air outlet, the ventilation device having a Control device for controlling the steering device with at least one sensor for detecting a direction (58) of an air flow of the outside air, wherein the steering device can be controlled by means of the control device in such a way that the outgoing air outlet is formed on a leeward side (64) of the air flow relative to the outside air inlet is.

Description

The invention relates to a ventilation device for a ventilation and air conditioning system in a building and a method for operating a ventilation device, the ventilation device being able to be arranged on an outer shell of a building, the ventilation device having an outside air inlet for sucking in outside air from an outside area and having an outgoing air outlet for blowing it out of exhaust air to the outside area.

Such ventilation devices and methods are well known and are regularly used for sucking in and blowing out air in buildings that is conveyed with ventilation and air conditioning systems. It is essential that the exhaust air discharged into the outdoor area does not cause any health risks for people in the outdoor area or any harmful effects on the building concerned, the people in it or the environment. The arrangement of the exhaust air outlet therefore depends to a large extent on the quality of the exhaust air. For example, chimneys are known with which contaminated exhaust air from industrial plants is discharged accordingly.

In the case of a ventilation and air conditioning system, a sufficient distance between the exhaust air outlet and the outside air inlet must be taken into account, as the outside air sucked in at the outside air inlet will otherwise be contaminated with exhaust air. This is particularly important when exhaust air contaminated with viruses is discharged from a room with infected people. A recirculation of contaminated air into the room is to be ruled out as far as possible. For air conditioning systems, DIN EN 13779, in the version valid on the priority date, regulates that a required distance between the outside air inlet and the exhaust air outlet must be maintained at a certain degree of pollution of the exhaust air. Even for pollution classes ETA 1 and ETA 2, low degree of pollution, this distance is at least two meters. Higher contamination classes also require higher clearances. If, therefore, demands are placed on fresh and uncontaminated supply air, the only remaining option is to design the respective ventilation device in such a way that the outside air inlet is spaced as far as possible from the exhaust air outlet.

However, the design of such a ventilation device is comparatively complex, since then on an outer shell of a building, be it on an outer wall or on a roof or even inside the building, corresponding distances must be formed via ventilation ducts, which branch from the air conditioning system. However, this is not always easy to implement, it is expensive and aesthetically unappealing, especially in the exterior of buildings. In addition, ventilation and air conditioning systems or ventilation devices can also be provided for individual rooms, so that the formation of a corresponding distance between the outside air inlet and the exhaust air outlet on an outside wall of a single room is only possible For example, a chimney-like, long ventilation duct can be implemented on the outer wall for the exhaust air.

The present invention is therefore based on the object of proposing a ventilation device for a ventilation and air conditioning system in a building and a method for operating such a ventilation device, which avoids contamination of the outside air at the outside air inlet in a cost-effective manner.

This object is achieved by a ventilation device having the features of claim 1, a building having the features of claim 14 and a method having the features of claim 17.

The ventilation device according to the invention for a ventilation and air conditioning system of a building can be arranged on an outer shell of a building, the ventilation device being designed with an outside air inlet for sucking in outside air from an outside area and with an exhaust air outlet for blowing out or flowing out exhaust air into the outside area, the ventilation device has a guidance device with at least one air duct for guiding the exhaust air to the exhaust air outlet, wherein the ventilation device has a control device for controlling the guidance device with at least one sensor for detecting the direction of an air flow of the outside air, the guidance device being controllable by means of the control device in such a way that the Exhaust air outlet is formed relative to the outside air inlet on a leeward side of the air flow.

The ventilation device according to the invention can therefore be arranged on an outer shell of a building, a roof or preferably an outer wall of the building, so that the ventilation device is located in the outside area of the building. The ventilation device is then connected to the ventilation and air conditioning system, through which outside air is sucked in through the outside air inlet and through the exhaust air outlet, exhaust air is blown out or flowed out into the outside area. The The steering device is designed with at least one air duct in the outside area, with which the exhaust air is guided to the exhaust air outlet. A sensor for detecting an air flow of the outside air is also provided, so that the control device can control the steering device depending on the direction of the air flow or a direction of the air flow of the outside air. The control of the steering device provides that the exhaust air outlet is always on a leeward side of the air flow, relative to a position of the outside air inlet. Consequently, the outside air inlet is always formed or arranged on a windward side of the air flow relative to the exhaust air outlet. For this purpose, the control device can position the air duct for guiding the exhaust air in a variety of ways, for example by moving the air duct or by deflecting the exhaust air into the relevant air duct leading to the leeward side. The fact that the outside air inlet is always on the lee side of the air flow ensures that the exhaust air always moves in the direction away from the outside air inlet. The exhaust air can then not easily get into the outdoor air intake. The inventive idea of aligning the outside air inlet relative to the exhaust air outlet depending on the air flow in the building makes it possible to dispense with particularly long air ducts and to minimize a relative distance between outside air inlet and exhaust air outlet. Thus, only the one air duct for guiding the outside air from the outside air inlet to the ventilation and air conditioning system can be configured. The control device then controls the outside air inlet in such a way that it is formed on the windward side of the air flow relative to the exhaust air outlet. The control device can be designed as an electrical or a mechanical control device.

Since there is always an air flow on buildings, be it due to wind, thermals or convection of air heating up on the outer shell, the steering device can also always be used. Should the theoretically possible case arise that there is no wind, contamination would not be likely either, since the exhaust air would then not be blown in the area of the outdoor air intake as a result of wind. A temperature difference between the outside air and the exhaust air also ensures air movement or evacuation of the exhaust air. Nevertheless, it is then also possible for the control device to be able to switch off the ventilation and air conditioning system.

The outside air inlet and the outgoing air outlet can advantageously be formed at a relative distance from one another of ≦3 meters, preferably ≦2 meters, particularly preferably ≦1 meter. The relative distance here relates to the respective edges of the inlet or outlet. By reducing the relative distance, it is possible to construct a ventilation device in a particularly compact and therefore cost-effective manner while at the same time providing a high level of protection.

The ventilation device can form an exhaust air inlet following a ventilation and air conditioning system, with the air duct being able to connect the outgoing air outlet to the exhaust air inlet. The ventilation and air conditioning system can be arranged inside the building, so that the exhaust air inlet can be connected to a bushing in an outer shell of a building.

The air duct can be designed with at least two duct openings in the outside area, and the guiding device can be designed with at least one valve, with the valve being able to direct the exhaust air to one of the duct openings that forms the exhaust air outlet. The two duct openings can be formed on or in the air duct at a relative distance from one another. By means of the valve, the exhaust air can then be diverted to one of the duct openings as a function of an atmospheric air flow. The duct opening where the exhaust air exits then forms the exhaust air outlet. The valve can be designed as a 2/3-way valve or 3/3-way valve. When the valve is actuated, the control device can then Execute easily depending on the air flow determined with the sensor.

The guiding device can have a further air duct for guiding the outside air from the outside air inlet, with the ventilation device being able to form a supply air outlet for connection to a ventilation and air-conditioning system, with the further air duct being able to connect the outside air inlet with the supply air outlet. The further air duct can accordingly conduct the outside air from the outside air inlet to the ventilation and air conditioning system. The supply air outlet can then be designed in such a way that the supply air reaches the ventilation and air conditioning system through a passage in the outer shell of the building. It is thus also possible to maximize a distance between the outgoing air outlet and the outside air inlet by moving or switching over the air duct and/or the further air duct relative to the air flow.

The further air duct can be formed with at least two further duct openings in the outside area, wherein the guiding device can be formed with at least one further valve, with the further valve being able to direct the outside air to one of the further duct openings which forms the outside air inlet. Analogously to the air duct, two further duct openings can therefore also be provided in the further air duct, of which one of the further duct openings forms the outside air inlet depending on the atmospheric air flow. The further valve can then also be actuated here by means of the control device. The further valve can also be coupled to the valve with regard to actuation, for example via a common axis.

In particular, the use of an additional air duct makes it possible to space the outside air inlet even further from the outgoing air outlet and to control a respective position of the outside air inlet and the outgoing air outlet depending on a wind direction.

The duct openings can be formed at the respective ends of the air duct and/or the further duct openings can be formed at the respective ends of the further air duct. The air ducts can then be formed in a particularly simple manner. In particular, simple, straight channel profiles can be used to form the guiding device, as a result of which the ventilation device can be formed in a particularly cost-effective manner. The ends may be formed with a roof-like slope to prevent rainwater from entering over the ends. A drain for rainwater can also be integrated.

The air duct and the additional air duct can be configured to run parallel to one another, at least in sections, with the air duct being able to be configured comparatively longer than the additional air duct. The air duct and the further air duct can also be designed to run exclusively parallel to one another. Since the air duct is comparatively longer than the other air duct, it can always be ensured that the outside air inlet is formed on a windward side of the air flow and the outgoing air outlet is formed on a leeward side of the air flow. The air duct can therefore protrude a bit beyond the further air duct at its respective ends. The air duct can be arranged facing away from the outer wall and the further air duct facing the outer wall. The steering device can then be made particularly compact.

The air duct and the further air duct can be designed to abut one another horizontally relative to a horizontal plane at least in sections. Provision can also advantageously be made to arrange the two air ducts horizontally on an outer shell or outer wall of a building, since wind often occurs along a horizontal plane and forms a corresponding air flow. In principle, provision could also be made for aligning the air ducts in one direction of an air flow. This can be done automatically by means of the control device, or by a wing Sails or a stowage area on the steering device of the steering device. However, the air duct and the further air duct can also be oriented in any other desired direction. Furthermore, both air ducts can have different orientations.

The exhaust air inlet can be connected to the air duct adjacent to one end of the air duct and the supply air outlet can be connected to the further air duct adjacent to an end of the further air duct opposite the end of the air duct. In principle, it is possible to direct the outside air and the exhaust air to the ventilation device in parallel air ducts through a passage in the outer shell of the building. It is also possible that two passages are provided in the outer shell, one for the exhaust air and one for the outside air. In this case, it makes sense to arrange the exhaust air inlet at the end of the air duct and the supply air outlet at the corresponding opposite end of the further air duct and to connect them to the air conditioning system or corresponding bushings in the outer shell. The ventilation device can thus be made particularly compact.

The valve and/or the further valve can be controllable by means of the control device depending on the direction of the air flow. The direction of the atmospheric air flow is detected by the sensor. The sensor can be an anemometer, which can also be used to measure a speed of the air flow. A plurality of sensors can also be provided, for example pressure sensors, with the aid of which a differential pressure can be measured at the air duct or at the further air duct. By means of the differential pressure measurement, a negative pressure as well as an overpressure can be measured. A sensor alone can also be used here, since, for example, in the case of a negative pressure, it can be assumed that an overpressure must necessarily be present at another point. The controller can then determine the direction of air flow and the valves correspondingly in such a way that the outdoor air inlet is as far away from the exhaust air outlet as possible and is on the leeward side of the air flow. As an alternative to mechanically driven valves, the valves can also be formed by self-opening flaps. The control device can then be designed as a mechanical control device, for example by one or more damming surfaces that can be actuated with the air flow and whose movement is transmitted to the flaps.

The valve and/or the additional valve can be designed with an actuator and a ventilation flap each. The actuator can be an electromagnetic actuator or a servomotor. The valve can be designed in such a way that switching between two valve positions is possible. It is also advantageous if an intermediate position, for example a central position of a ventilation flap, can be set with the valve or the ventilation flap, for example for the theoretical case that there is no wind. The ventilation flap can be designed as a flat, pivotable flap or as a curved, for example semi-circular flap that can be rotated about an axis and completely and/or partially closes the duct sections.

The valve and/or the additional valve can be designed with a mechanical drive that can be actuated by means of an atmospheric pressure difference. A pressure difference or a change in wind direction can then cause the valve to be actuated or switched over. The mechanical drive can, for example, be a flap that can be actuated by the pressure difference.

Relative to a horizontal plane, the outside air inlet can be formed below the exhaust air outlet. This is particularly advantageous since exhaust air regularly has a higher temperature than outside air and the exhaust air therefore tends to rise up the building. By the arrangement of the outside air intake below the exhaust air outlet it is then possible not only to take into account the wind direction, but also a possible movement of the exhaust air after exiting the exhaust air outlet.

The building according to the invention comprises an air conditioning system and a ventilation device according to the invention.

The ventilation and air conditioning system can be a decentralized ventilation device in a room in the building, with the ventilation device comprising a device unit and a control device for controlling the ventilation device, with the device unit having a heat exchanger, a filter device with at least one filter, a fan for generating an air flow through the Heat exchanger and the filter may include, wherein the device unit with an exhaust air inlet for drawing in exhaust air from the room, with a supply air outlet for blowing out supply air into the room, with an outside air connection for sucking in outside air from the ventilation device or an outdoor area, and with a Exhaust air connection for blowing out exhaust air in the ventilation device can be designed. The ventilation unit can therefore be arranged within the room so that there is no need to lay ventilation ducts through the building. As a result, the ventilation unit can be used as a decentralized ventilation unit and can also be permanently installed later in existing buildings without much effort. In addition, the air in the room is not circulated by the ventilation unit, but rather the air is exchanged by exchanging room air with the outside air. This makes it possible to supply people in the room with fresh air that has a comparatively lower carbon dioxide concentration than the room air. In addition, any viruses, spores or other harmful contaminants in the room air can be blown out into the outside area, which significantly increases the air quality in the room. In principle, the decentralized ventilation device can also function on its own without the ventilation device be used. The decentralized ventilation device can therefore also be an object according to the invention to be claimed alone.

Consequently, layered ventilation of the room can be formed by means of the ventilation device, it being possible for the device unit to be designed with a device housing which can be arranged in or on a single room. The device housing can be easily arranged, for example, on a side wall or outer wall of the room. The passages for the outside air inlet and the exhaust air outlet can then be formed from the relevant wall into an outside area. A single device housing is also particularly suitable for retrofitting a single room with the ventilation unit.

The device unit can be designed in such a way that the exhaust air inlet is arranged in the area of a ceiling of the room and the supply air outlet in the area of a floor of the room. If the exhaust air inlet is arranged in the area of a ceiling of the room and the supply air outlet is arranged in the area of a floor of the room, the supply air can be introduced into the room with low impulses, as a result of which the fan can be operated with lower power and thus in a cost-saving manner. A so-called fresh air lake can also be formed in the area of the floor, which is heated there and flows upwards in the area of the ceiling to the exhaust air inlet. Stratified ventilation can be made possible by means of this air flow. Any turbulence in the room, which could promote the spread of viruses or the like, is thus effectively avoided. There is also no significant acoustic disturbance due to fan noise from the ventilation unit. Overall, the ventilation device can then be used to significantly improve health protection for people in the room at low cost, especially in existing buildings.

Further embodiments of a building result from the feature descriptions of the dependent claims referring back to the device claim 1 .

In the method according to the invention for operating a ventilation device for a ventilation and air conditioning system of a building, the ventilation device is arranged on an outer shell of a building, with an outside air inlet of the ventilation device sucking in outside air from an outside area and with an exhaust air outlet of the ventilation device exhaust air being blown out into the outside area, wherein the exhaust air is guided to the exhaust air outlet by means of a steering device of the ventilation device with at least one air duct, the steering device being controlled with a control device of the ventilation device and a direction of an air flow of the outside air being detected with at least one sensor of the control device, the steering device being controlled in this way by means of the control device is that the exhaust air outlet is formed on a leeward side of the airflow relative to the outside air inlet. For the advantages of the method according to the invention, reference is made to the description of the advantages of the ventilation device according to the invention.

Further embodiments of a method result from the feature descriptions of the dependent claims referring back to the device claim 1 .

Preferred embodiments of the invention are explained in more detail below with reference to the accompanying drawings.

Fig. 1

Eine Seitenansicht auf einen Raum mit einem Lüftungsgerät;

Fig. 2

eine weitere Seitenansicht des Raums mit dem Lüftungsgerät;

Fig. 3

eine Schnittansicht einer Geräteeinheit des Lüftungsgerätes;

Fig. 4

eine Draufsicht einer Lüftungsvorrichtung an einer Außenwand in einem ersten Betriebszustand;

Fig. 5

die Lüftungsvorrichtung aus Fig. 4 in einem zweiten Betriebszustand;

Fig. 6

die Lüftungsvorrichtung aus Fig. 4 in einem dritten Betriebszustand;

Fig. 7

eine Schnittansicht der Lüftungsvorrichtung aus Fig. 4 an der Außenwand entlang einer Linie VII-VII;

Fig. 8

eine Schnittansicht der Lüftungsvorrichtung aus Fig. 4 entlang einer Linie VIII-VIII;

Fig. 9

eine Schnittansicht der Lüftungsvorrichtung aus Fig. 5 entlang einer Linie IX-IX;

Fig. 10

eine Schnittansicht der Lüftungsvorrichtung aus Fig. 6 entlang einer Linie X-X;

Fig. 11

eine Vorderansicht einer weiteren Ausführungsform einer Lüftungsvorrichtung.

Show it:

1

A side view of a room with a ventilation unit;

2

another side view of the room with the ventilation unit;

3

a sectional view of a device unit of the ventilation device;

4

a plan view of a ventilation device on an outer wall in a first operating state;

figure 5

the ventilation device off 4 in a second operating condition;

6

the ventilation device off 4 in a third operating condition;

7

a sectional view of the ventilation device 4 on the outer wall along a line VII-VII;

8

a sectional view of the ventilation device 4 along a line VIII-VIII;

9

a sectional view of the ventilation device figure 5 along a line IX-IX;

10

a sectional view of the ventilation device 6 along a line XX;

11

a front view of a further embodiment of a ventilation device.

A synopsis of Figures 1, 2 and 3 shows a ventilation device 10 in different views inside a room 11. The room 11 is formed by an outer wall 12, side walls 13, a floor 14 and a ceiling 15 and has at least one window 16 to an outside area 17. The ventilation device 10 comprises a device unit 18 and a control device for controlling the ventilation device 10, not shown here in detail. formed with an outside air inlet 21 for sucking in outside air from the outside area 17, and with an exhaust air outlet 22 for blowing out exhaust air into the outside area 17. In the example shown here, the outside air intake 21 and the outgoing air outlet 22 are formed by a ventilation device 23 attached to the outer wall 12 . In principle, there can also be a direct connection to the outside area 17 by means of bushings 24 in the outside wall 12 without using a ventilation device 23 .

The device unit 18 is formed with a device housing 25 which is arranged on the ceiling 15 and a side wall 13 of the room 11 . The device unit 18 includes a heat exchanger 26 and a filter device 27, as well as a fan for generating an air flow, not shown in detail here. A heating device 28 is also provided for heating the outside air. The respective air flow can also be routed past the heat exchanger 26 by means of a first bypass 29 and a second bypass 30 .

The device housing 25 forms a vertical ventilation duct 31 which runs along the side wall 13 . The exhaust air inlet 21 is arranged on the ceiling 15 of the room 11 and the supply air outlet 20 on the floor 14 of the room 11, so that the supply air is blown into the room 11 in the area of the floor 14 and the exhaust air is sucked out of the room 11 with the exhaust air inlet 19 can. In principle, the ventilation device 10 can also be used functionally for the ventilation of the room 11 without the ventilation device 23 .

A synopsis of Figures 4 to 10 shows a ventilation device 42 in different operating states and views. The ventilation device 42 is arranged on an outer wall 43 of a building (not shown in detail) and is connected to an air conditioning system or a ventilation device 44 within a room 45 of the building. In particular, two bushings 46 for connecting the ventilation device 42 and ventilation device 44 are formed in the outer wall 43 . The ventilation device 42 comprises an air duct 47 and a further air duct 48, the air duct 47 at its respective ends 49 channel openings 50, and the further air duct 48 at its respective ends 51 further channel openings 52 are formed. Furthermore, a valve 53 is formed on the air duct 47 and a further valve 54 is formed on the further air duct 48, which can be controlled by means of a control device of the ventilation device 42, which is not shown here. The valve 53 and the further valve 54 have half-shell-shaped flaps 55, the position of which can be adjusted or rotated about an axis 56 by means of a drive, not shown in detail here. This makes it possible to divert an air flow in each of the air duct 47 and the further air duct 48 as required. The air duct 47 and the further air duct 48 thus form a guiding device 57 of the ventilation device 42 . The control device also has at least one sensor, not shown here, for detecting a direction of an air flow of the outside air, indicated here by an arrow 58, in an outside area 59. Depending on the air flow, the control device can now control or actuate valve 53 and the additional valve 54 and thus guide an air flow of the ventilation device 44 .

At the in the 4 In the air flow of the outside air shown, exhaust air from the ventilation unit 44 reaches the valve 53 via an exhaust air inlet 60 of the ventilation device 42 and, due to the position of the valve 53, is diverted to an exhaust air outlet 61 for blowing out the exhaust air into the outside area 59 at one of the ends 49. The ventilation device 42 or the additional air duct 48 is also connected to the ventilation device 44 via a supply air outlet 62 . Based on a position of the further valve 54 , outside air is then sucked in from the outside area 59 via an outside air inlet 63 at one of the ends 51 . It is essential here that the exhaust air outlet 61 is on a lee side 64 relative to the wind direction or the outside air inlet 63 due to the position of the valve 53 and the outside air inlet 63 is on an upwind side 65 relative to the wind direction or the exhaust air outlet 61 due to the Position of the other valve 54 is located. In this way it can always be ensured that the exhaust air is guided away from the outside air inlet 63 by the air flow and at the outside air inlet 63 outside air that is not contaminated with exhaust air is always sucked in.

The figure 5 shows an opposite wind direction with the arrow 58, with the exhaust air outlet 61 and the exhaust air inlet 63 being located at the respective opposite ends 49 and 51 here due to the respective positions of the valve 53 and further valve 54.

The 6 shows the theoretically possible case that there is no wind in the outer area 59. Here the valve 53 and the further valve 54 are switched in such a way that the outgoing air outlet 61 is formed at the respective ends 49 and the outside air inlet 63 is formed at the respective ends 51 . This means that inflow and outflow velocities can be reduced by around 50%, so that the respective flows hardly influence each other. Due to the fact that the exhaust air is regularly warmer than the outside air, it rises vertically. The fact that the further air duct 48 is designed to be comparatively shorter and offset with its ends 51 relative to the air duct 47 can also largely ensure that uncontaminated outside air is sucked in even when there is no wind.

The essential advantage resulting here from the ventilation device 42 is that a relative distance between the outside air inlet 63 and the outgoing air outlet 61 can be reduced beyond the extent required according to normative specifications. In particular, the ventilation device 42 also enables a comparatively compact design and a connection to the ventilation device 44 via the bushings 46, which are comparatively close together. The parallel routing of the air duct 47 and the further air duct 48 and their horizontal arrangement also saves space and produces a comparatively more aesthetic overall impression than air ducts branching on an outer wall.

The 11 shows a further embodiment of a ventilation device 66 on an outer wall 67 of a building not shown in detail here. Here, too, passages 68 are formed in the outer wall 67 . A wind direction is marked with an arrow 69 . In the case of the ventilation device 66, only an air duct 70 with a valve 71 is provided. The air duct 70 is arc-shaped and has two open ends 72 . The valve 71 is controlled by means of a control device, not shown, which detects an air flow of the outside air via a sensor, also not shown, such that an exhaust air outlet 73 for blowing out exhaust air into an external area 74 is formed at one of the ends 72 . An outside air inlet 75 for sucking outside air from the outdoor area 74 is formed below the air duct 70 through one of the ducts 68 . With this very simple embodiment of the ventilation device 66, the position of the exhaust air outlet 73 relative to the outside air inlet 75 can also be adjusted so that the exhaust air outlet 73 relative to the outside air inlet 75 is on a leeward side 76 of an air flow and the outside air inlet 75 is relative to the exhaust air outlet 73 on an upwind side 77 of the air flow is located. Nevertheless, the outside air inlet 75 is arranged below the outgoing air outlet 73 . Since the exhaust air is regularly warmer than the outside air, it therefore always moves upwards, away from the outside air inlet 75.

Claims (18)

Ventilation device (23, 42, 66) for a ventilation and air-conditioning system (10, 44) of a building, wherein the ventilation device can be arranged on an outer shell of a building, the ventilation device having an outside air inlet (21, 63, 75) for sucking in outside air from a outside area (17, 59, 74) and is designed with an exhaust air outlet (22, 61, 73) for blowing out exhaust air into the outside area,
characterized,
that the ventilation device has a steering device (57) with at least one air duct (47, 70) for guiding the exhaust air to the exhaust air outlet, the ventilation device having a control device for controlling the steering device with at least one sensor for detecting a direction (58, 69) of an air flow of the outside air, wherein the guiding device can be controlled by means of the control device in such a way that the exhaust air outlet is formed on a leeward side (64, 76) of the air flow relative to the outside air inlet. Ventilation device according to claim 1,
characterized,
that the outside air inlet (21, 63, 75) and the outgoing air outlet (22, 61, 73) are formed at a relative distance from one another of ≦3 m, preferably ≦2 m, particularly preferably ≦1 m. Ventilation device according to claim 1 or 2,
characterized ,
that the ventilation device (23, 42, 66) forms an exhaust air inlet (19, 60) for connection to a ventilation and air conditioning system (10, 44), the air duct (47, 70) connecting the outgoing air outlet (22, 61, 73) to the exhaust air inlet connects. Ventilation device according to one of the preceding claims,
characterized ,
that the air duct (47, 70) is formed with at least two duct openings (50) in the outer area (17, 59, 74), the steering device (57) being formed with at least one valve (53, 71), with the valve the exhaust air can be routed to one of the channel openings (50) which forms the exhaust air outlet (22, 61, 73). Ventilation device according to claim 4,
characterized ,
that the guiding device (57) has a further air duct (48) for guiding the outside air from the outside air inlet (21, 63, 75), the ventilation device (23, 42, 66) having a supply air outlet (20, 62) for connection to a ventilation and air conditioning system System (10, 44) forms, wherein the further air duct connects the outside air inlet to the supply air outlet. Ventilation device according to claim 5,
characterized ,
that the further air duct (48) is formed with at least two further duct openings (52) in the outer area (17, 59, 74), the steering device (57) being formed with at least one further valve (54), with the further valve the outside air can be routed to one of the further duct openings which forms the outside air inlet (21, 63, 75). Ventilation device according to claim 5 or 6,
characterized ,
that the channel openings (50) are formed at respective ends (49, 72) of the air channel (47, 70) and/or the further channel openings (52) at respective ends (51) of the further air channel (48). Ventilation device according to one of claims 5 to 7,
characterized ,
that the air duct (47) and the further air duct (48) are designed to run parallel to one another at least in sections, the air duct being designed comparatively longer than the further air duct. Ventilation device according to one of claims 5 to 8,
characterized ,
that the air duct (47) and the further air duct (48), relative to a horizontal plane, are designed to abut one another horizontally at least in sections. Ventilation device according to one of claims 5 to 9,
characterized ,
in that the exhaust air inlet (19, 60) is connected to the air duct adjacent one end (49) of the air duct (47) and the supply air outlet (20, 62) is connected adjacent to an end opposite the end of the air duct End (51) of the further air duct (48) is connected to the further air duct. Ventilation device according to one of claims 4 to 10,
characterized ,
that the valve (53, 71) and/or the further valve (54) can be controlled by means of the control device depending on the direction of the air flow. Ventilation device according to one of claims 4 to 11,
characterized ,
that the valve (53, 71) and/or the further valve (54) are designed with an actuator and a ventilation flap (55) in each case. Ventilation device according to one of claims 4 to 12,
characterized ,
that the valve (53, 71) and/or the further valve (54) are designed with a mechanical drive that can be actuated by means of an atmospheric pressure difference. Ventilation device according to one of the preceding claims,
characterized ,
that the outside air inlet (21, 75), relative to a horizontal plane, is formed below the exhaust air outlet (22, 73). Building with an air conditioning system (10, 44) and a ventilation device according to one of the preceding claims. Building according to claim 15,
characterized ,
that the air conditioning system (10, 44) is a decentralized ventilation device in a room (11, 45) of the building, the ventilation device comprising a device unit (18) and a control device for controlling the ventilation device, the device unit having a heat exchanger (26), a filter device (27) with at least one filter, a fan for generating an air flow through the heat exchanger and the filter, the device unit having an exhaust air inlet (19) for sucking in exhaust air from the room, with a supply air outlet for blowing out supply air (20) into the room, with an outside air connection for sucking in Outside air from the ventilation device or an outdoor area, and is formed with an exhaust air connection for blowing out exhaust air in the ventilation device. Building according to claim 15 or 16,
characterized ,
that the device unit is designed in such a way that the exhaust air inlet (19) is arranged in the area of a ceiling (15) of the room (11, 45) and the supply air outlet in the area of a floor (14) of the room. Method for operating a ventilation device (23, 42, 66) for a ventilation and air conditioning system (10, 44) of a building, the ventilation device being arranged on an outer shell (12, 43, 67) of a building, with an outside air inlet (21, 63 , 75) the ventilation device sucks in outside air from an outside area (17, 59, 74) and exhaust air is blown out into the outside area with an exhaust air outlet (22, 61, 73) of the ventilation device,
characterized ,
that the exhaust air is routed to the exhaust air outlet by means of a steering device (57) of the ventilation device with at least one air duct (47, 70), the steering device being controlled with a control device of the ventilation device and a direction (58, 69) being controlled with at least one sensor of the control device airflow of the outside air is detected, the guiding device being controlled by the control device in such a way that the exhaust air outlet is formed on a leeward side (64, 76) of the air flow relative to the outside air inlet.

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