Air connecting piece for a ventilation device, corresponding ventilation device and method for mounting a ventilation device

Abstract

The invention relates to an air connection device (4) for a ventilation unit (1).The air connection device (4) is provided to have a first air connection nozzle (5) and a second air connection nozzle (6) angled relative to the first air connection nozzle (5), which are formed by a common air connection housing (7), each have an outer air connection opening (8, 9) and an inner air connection opening and are each connected via their inner air connection opening to a flow space (10) which is at least partially limited by the air connection housing (7), wherein an actuating element (24) is displaceably mounted on the air connection housing (7), which in a first position closes the second air connection nozzle (6) more fluidly than the first air connection nozzle (5) and in a second position closes the first air connection nozzle (5) more fluidly than the second air connection nozzle (6).The invention further relates to a ventilation device (1) with an air connection device (4) and a method for mounting a ventilation device (1).

Description

[0001] The invention relates to an air connection device for a ventilation unit, a ventilation unit with such an air connection device, and a method for mounting a ventilation unit.

[0002] The prior art is known from publication EP 3 910 251 A1. This publication describes an air conditioning unit with a housing, characterized by the inclusion of a shielding plate and a filter, which can be interchangeably mounted according to the air intake direction of the air conditioning unit. It explains that for the correct installation of air conditioning units, an intake direction and an exhaust direction must be defined depending on the location where the unit is to be installed. Since the intake and exhaust directions are usually fixed, the flexibility of the units is limited, and installation is not possible in every location. Furthermore, efficient air circulation is prevented, for example, in confined spaces such as under suspended ceilings, near an intake opening.

[0003] The object of the invention is to propose an air connection device for a ventilation unit which has advantages over known air connection devices, in particular enabling a flexible choice of the orientation of an air connection while still allowing for particularly simple installation of the ventilation unit.

[0004] This is achieved according to the invention with an air connection device for a ventilation unit with the features of claim 1. The air connection device comprises a first air connection nozzle and a second air connection nozzle angled relative to the first air connection nozzle, which are formed by a common air connection housing, each having an outer air connection opening and an inner air connection opening, and each being connected via its inner air connection opening to a flow space at least partially bounded by the air connection housing. An actuating element is displaceably mounted on the air connection housing, which in a first position closes the second air connection nozzle more fluidly than the first air connection nozzle, and in a second position closes the first air connection nozzle more fluidly than the second air connection nozzle.

[0005] Advantageous embodiments with expedient further developments of the invention are specified in the dependent claims. It should be noted that the exemplary embodiments described in the description are not limiting; rather, any variations of the features disclosed in the description, the claims, and the figures are possible.

[0006] The air connection device is preferably an integral part of the ventilation unit, but can of course be separate from it, particularly until the air connection device is mounted on the ventilation unit. The ventilation unit is preferably an indoor ventilation unit for a building, especially a residential building. The ventilation unit is particularly preferably a small-room ventilation unit. For example, the ventilation unit is installed in a housing that is mounted on and / or in a wall of the building. The housing can be a surface-mounted or flush-mounted housing. It is usually mounted on the wall, and only then is the ventilation unit inserted into it. In this case, the ventilation unit can also be referred to as a ventilation unit insert or fan insert. The ventilation unit preferably has at least one fan for conveying air to or from an interior space of the building.In particular, the ventilation unit is used to exchange air between the interior and an outside environment of the building, especially to remove air from the interior towards the outside environment.

[0007] The air connection device serves to connect the ventilation unit in a fluid-dynamic manner, and can be configured either as an air inlet connection device or an air outlet connection device. In the former case, the air connection device serves to supply air to the ventilation unit, and in the latter case, to exhaust air from the ventilation unit. In other words, when configured as an air inlet connection device, air from the outside environment of the ventilation unit enters the ventilation unit through the air connection device, whereas when configured as an air outlet connection device, the air flows out of the ventilation unit through the air connection device towards the outside environment.

[0008] The purpose of the air connection device according to the invention is to implement different flow directions for the ventilation unit, i.e., to be able to flexibly determine the inflow of air into or outflow of air from the ventilation unit during installation, without requiring a complex modification of the ventilation unit. In particular, it is intended that the ventilation unit be connected to a ventilation duct installed in a building wall via the air connection device. With the aid of the air connection device, the ventilation unit can be adapted to different arrangements and orientations of the ventilation duct.

[0009] For this purpose, the air connection device has several air connection nozzles, namely the first air connection nozzle and the second air connection nozzle. The two air connection nozzles are angled relative to each other; their longitudinal axes form an angle greater than 0° and less than 180°. Preferably, the angle is at least 60° and at most 120°, at least 75° and at most 105°, or approximately or exactly 90°. A first flow channel is located in the first air connection nozzle, and a second flow channel is located in the second nozzle. The outer air connection opening and the inner air connection opening in the respective air connection nozzle are fluidically connected via the respective flow channel.The first air connection nozzle therefore has a first inner air connection opening and a first outer air connection opening, which are fluidically connected to each other via the first flow channel. Similarly, the second air connection nozzle has a second inner air connection opening and a second outer air connection opening, which are fluidically connected to each other via the second flow channel.

[0010] The external air inlet opening is understood to be an air inlet opening that extends through or is formed within the outer surface of the air inlet housing of the air inlet device. The internal air inlet opening, on the other hand, is located within the air inlet device and represents the outlet of the respective flow channel into the flow space, which is at least partially bounded by the air inlet housing. Thus, the respective external air inlet opening is fluidically connected to the flow space via each of the flow channels.Due to the angled arrangement of the air connection nozzles and thus their flow channels relative to each other, the main airflow directions through the air connection nozzles are also angled relative to each other, so that the different flow directions for the ventilation unit are realized with the help of the air connection device and the ventilation unit can be adapted to different orientations of the ventilation pipe.

[0011] Preferably, the outer air connection opening and the inner air connection opening of the first air connection nozzle are congruent and / or the outer air connection opening and the inner air connection opening of the second air connection nozzle are congruent, i.e., they have the same shape and dimensions in cross-section.

[0012] In particular, the first flow channel and / or the second flow channel have a cylindrical shape and are thus designed with a constant cross-section over their entire extent from the respective outer air connection opening to the inner air connection opening.

[0013] The simple conversion of the ventilation unit equipped with the air connection device is achieved using the actuator, which is mounted on the air connection housing so that it can be moved. The actuator determines which of the air connection ports connects the ventilation unit to the outside environment or the ventilation duct. In the first position of the actuator, the airflow is connected via the first air connection port, and in the second position, via the second air connection port, preferably exclusively. Accordingly, in its first position, the actuator restricts airflow more completely to the second air connection port than to the first, whereas in its second position, it restricts airflow more completely to the first air connection port than to the second.

[0014] It can be provided that, in the case of an air connection device separate from the ventilation unit, the actuating element in its first position only partially closes the second air connection port and in its second position only partially closes the first air connection port, in particular not closing it completely. Preferably, the actuating element closes the respective air connection port together with the ventilation unit housing, so that in the first position the actuating element together with the ventilation unit housing closes the second air connection port and releases the first air connection port, while in the second position it together with the ventilation unit housing closes the first air connection port and releases the second air connection port.

[0015] To close or open the respective air connection nozzle, the actuating element may be designed to at least partially overlap or cover the inner air connection opening of the respective air connection nozzle. In other words, in its first position, the actuating element should close the inner air connection opening of the second air connection nozzle more completely than the inner air connection opening of the first air connection nozzle, and in its second position, it should close the inner air connection opening of the first air connection nozzle more completely than the inner air connection opening of the second air connection nozzle.

[0016] It may be provided that the actuator is positioned and fixed in a position selected from the first and second positions. For this purpose, for example, appropriate fastening means are arranged on the air connection housing, which interact with the actuator in its first position to hold it there, and interact with it in the second position to hold it there. For example, the fastening means are designed as locking devices, so that the actuator can be moved from the first position to the second position and vice versa from the second position to the first position without damage, provided sufficient force is applied.

[0017] It is particularly preferred, however, that the actuating element is freely movable when the air connection device is located away from the ventilation unit, i.e., it is not fixed in any of its positions, but rather can be moved between the first and second positions and vice versa with a constant force. Preferably, the actuating element is also fixed by an interaction between the air connection device and the ventilation unit or its housing. Thus, if the actuating element is arranged in the first position with the air connection device separate from the ventilation unit, and the air connection device is subsequently mounted on the ventilation unit or its housing, the actuating element is fixed in the first position, either permanently or at least until the air connection device is removed from the ventilation unit.The same applies to the second position. This allows for tool-free adjustment of the flow direction or the air connection nozzle to be used.

[0018] A further development of the invention provides that the actuating element is a flap and is rotatably mounted on the air connection housing about a flap pivot axis, in particular by means of a film hinge formed by the air connection housing. The flap is rotatable or pivotable relative to the air connection housing, namely about the flap pivot axis. Preferably, a bearing used for mounting the flap on the air connection housing engages the flap off-center, in particular at its edge. The bearing is particularly preferably a film hinge formed by the air connection housing and thus integrally formed with the air connection housing. Particularly preferably, the flap, the film hinge, and the air connection housing are together integrally formed with the air connection housing.This enables particularly cost-effective production of the air connection device.

[0019] A further development of the invention provides that the actuating element extends at least partially through the first air connection nozzle. For example, the actuating element, regardless of its position, extends through the first air connection nozzle, particularly from the direction of the outer air connection opening towards the inner air connection opening. Preferably, the actuating element projects out of the first air connection nozzle through the inner air connection opening and into the flow chamber. The actuating element thus extends from the first air connection nozzle into the flow chamber, passing through the inner air connection opening of the first air connection nozzle.

[0020] Preferably, the bearing or hinge by means of which the actuating element is mounted on the air connection housing is located in or adjacent to the outer air connection opening of the first air connection nozzle. In this case, the actuating element extends from the outer air connection opening of the first air connection nozzle towards the inner air connection opening of the first nozzle, in particular passing through it and projecting from the first air connection nozzle into the flow chamber.Such a design of the actuating element enables compact dimensions of the air connection device while simultaneously providing a large flow cross-section of the air connection nozzles, since the actuating element, despite the small installation space of the air connection device, has sufficiently large dimensions to at least partially close one of the air connection openings in terms of flow characteristics, especially together with the ventilation unit housing.

[0021] A further development of the invention provides that the first air connection nozzle and the second air connection nozzle are formed integrally and from a single material, in particular as a single injection-molded component. The air connection nozzles are thus manufactured or formed during a single production step. They are bonded together and made of the same material. It is particularly preferred that the entire air connection device is manufactured integrally and from a single material, so that, in addition to the air connection nozzles, the air connection housing and the actuating element, which is preferably connected to the air connection housing via the film hinge, are also formed integrally and from a single material, and preferably in the form of the single injection-molded component. This results in a particularly cost-effective production of the air connection device.

[0022] A further development of the invention provides that the outer air connection opening of the first air connection nozzle and the outer air connection opening of the second air connection nozzle are limited in cross-section by several wall sections, wherein a first of the wall sections and a second of the wall sections run straight and are arranged parallel to each other and / or a third of the wall sections connecting the first wall section and the second wall section is curved.

[0023] In cross-section, the two external air inlet openings are each bounded by several wall sections. Specifically, the external air inlet opening of the first air inlet is bounded by a first section of wall sections, and the external air inlet opening of the second air inlet by a second section of wall sections. Each external air inlet opening is thus bounded by a first wall section, a second wall section, and a third wall section; these wall sections each contain the respective air inlet opening. The first and second wall sections are straight and parallel to each other. They are connected by the third wall section, which extends from the first wall section to the second wall section, and vice versa.The third wall section is curved, preferably in the form of a partial oval, for example as a partial circle or a partial ellipse, for example as a semi-oval, semi-ellipse or semicircle. In any case, a geometry of the external air connection opening is formed which is advantageously adjustable with respect to its flow cross-section using the adjusting element, since the adjusting element rests against the straight wall sections on opposite sides, preferably sealing against them.

[0024] A further development of the invention provides that a fourth wall section, connecting the first and second wall sections, is straight for the first air connection and / or curved for the second air connection. Preferably, the outer air connection openings of the two air connection openings differ in their geometry. In any case, the fourth wall section connects the first and second wall sections and is spaced apart from the third wall section. In particular, the first, second, third, and fourth wall sections completely and continuously surround their respective air connection openings.

[0025] In the case of the first air inlet, the fourth wall section is preferably straight, and in particular continuous. Specifically, it is perpendicular to the first and second wall sections, resulting in an overall symmetrical shape for the outer air inlet opening. In the case of the second air inlet, the fourth wall section is curved, particularly analogous to the third wall section. Preferably, the third and fourth wall sections are symmetrical to each other. In either case, the fourth wall section of the second air inlet can again be a partial oval, particularly a partial circle or a partial ellipse. Preferably, the fourth wall section of the first air inlet is arranged on its side facing the second air inlet, and conversely, the fourth wall section of the second air inlet is arranged on its side facing the first air inlet.This results in a particularly compact design of the air connection device.

[0026] The invention further relates to a ventilation device with an air connection device, in particular an air connection device according to the embodiments within the scope of this description.The air connection device is provided to have a first air connection nozzle and a second air connection nozzle angled relative to the first air connection nozzle, which are formed by a common air connection housing, each have an outer air connection opening and an inner air connection opening and are each connected via their inner air connection opening to a flow space that is at least partially limited by the air connection housing, wherein an actuating element is displaceably mounted on the air connection housing, which in a first position closes the second air connection nozzle more fluidly than the first air connection nozzle and in a second position closes the first air connection nozzle more fluidly than the second air connection nozzle.

[0027] The advantages of such a design for the ventilation unit and the air connection device have already been mentioned. Both the ventilation unit and the air connection device can be further developed as explained in this description, and reference is made to these explanations in that regard.

[0028] A further development of the invention provides that the air connection housing is attached to a ventilation unit housing of the ventilation unit in such a way that the flow space is jointly bounded by the air connection housing and the ventilation unit housing. During the installation of the ventilation unit, the air connection device is arranged on the ventilation unit housing, and the air connection housing is connected to it. The air connection housing and the ventilation unit housing are subsequently arranged relative to each other in such a way that they jointly bound the flow space, i.e., in cross-section, completely and continuously encompass it. In particular, the flow space is bounded by the air connection housing and the ventilation unit housing in such a way that the ventilation unit is fluidically connected via the air connection device exclusively to the respective air connection nozzle, especially taking into account typical leakage.Such a design of the ventilation unit is particularly advantageous with regard to assembly, since the actuating element is easily accessible and can be moved into the desired position before the air connection device is attached to the ventilation unit or the ventilation unit housing.

[0029] A further development of the invention provides that the actuating element projects into the ventilation unit housing, bearing against a first wall section of the housing in its first position for locking it in the first position, and against a second wall section of the housing in its second position for locking it in the second position. After the ventilation unit is installed, i.e., after the air connection device is attached to the ventilation unit housing, the actuating element is locked in its position during installation, either in the first position or in the second position.

[0030] If the actuator is positioned in the first position during installation, it rests against the first wall section after the air connection device is attached to the ventilation unit housing. This section holds it in the first position, or at least prevents the actuator from moving from the first position towards the second position. Conversely, if the actuator is positioned in the second position during installation, it rests against the second wall section after the air connection device is attached to the ventilation unit housing. This section again secures it in the second position, thus preventing it from moving from the second position towards the first position. This design of the ventilation unit allows for a simplified construction of the air connection device and, at the same time, easier installation.

[0031] A further development of the invention provides that, in the first position, the wall of the ventilation unit housing rests against the actuator and the air connection housing in such a way that a first flow connection between the first air connection nozzle and the flow chamber is opened and a second flow connection between the second air connection nozzle and the flow chamber is interrupted; and in the second position, it rests against the actuator and the air connection housing in such a way that the first flow connection between the first air connection nozzle and the flow chamber is interrupted and the second flow connection between the second air connection nozzle and the flow chamber is opened. Such a design has already been mentioned.

[0032] It can be provided that, if the air connection device is separate from the ventilation unit, the actuator only partially closes the second air connection in its first position and only partially closes the first air connection in its second position. If, however, the air connection device is located on the ventilation unit or its housing, the actuator and the housing work together to close one of the air connection ports, in particular to close it tightly, preferably taking into account typical leakage. For this purpose, the wall of the housing rests against the actuator and the air connection housing.

[0033] In the first position of the actuator, this action opens the first airflow connection and closes the second; in the second position, it opens the first airflow connection and closes the second. In other words, the wall of the ventilation unit housing rests against the actuator and the air connection housing in such a way that, in the first position of the actuator, the first air connection is open and the second is closed, whereas in the second position, the first air connection is closed and the second is open. This design of the ventilation unit achieves the advantages already mentioned.

[0034] A further development of the invention provides that a flow channel is located in the ventilation unit housing, via which the flow chamber is fluidically connected to a fan chamber formed within the ventilation unit housing. A longitudinal center axis of the first air connection nozzle is aligned parallel to, and a longitudinal center axis of the second air connection nozzle is angled relative to, a longitudinal center axis of the flow channel. The flow channel connects the flow chamber to the fan chamber. Preferably, a fan of the ventilation unit is arranged in the fan chamber, which conveys air either from or towards the air connection device, or is configured to do so.

[0035] The flow channel has a longitudinal center axis, particularly on its side facing the ventilation unit housing, which is parallel to the longitudinal center axis of the first air connection and angled to the longitudinal center axis of the second air connection. Therefore, an angle exists between the longitudinal center axes of the flow channel and the second air connection, or between the longitudinal center axis of the second air connection and an imaginary plane that completely encompasses the longitudinal center axis of the flow channel. This angle is greater than 0° and less than 180°, preferably at least 60° and at most 120°, at least 75° and at most 105°, or approximately or exactly 90°. This allows for extremely flexible flow guidance within the ventilation unit and a simple connection configuration.

[0036] A further development of the invention provides that the ventilation unit housing has an air inlet connection spaced apart from the air connection device, and that the air connection device is configured as an air outlet connection device. The ventilation unit is accordingly designed and configured to draw in air through the air inlet connection and discharge it again through the air connection device. The described configuration of the ventilation unit allows for flexible configuration of the air outlet connection device with selectable orientation of the air connection nozzle used.

[0037] A further development of the invention provides that the inner air inlet opening of the first air inlet nozzle is partially bounded by a first connecting web, and the inner air inlet opening of the second air inlet nozzle is partially bounded by a second connecting web angled relative to the first connecting web, wherein the first connecting web abuts a first counter web and the second connecting web abuts a second counter web of the ventilation unit housing in a sealing manner. The first connecting web partially encompasses the inner air inlet opening of the first air inlet nozzle, preferably only partially, and in particular only on its side facing away from the second air inlet nozzle. The second connecting web, on the other hand, partially bounds the inner air inlet opening of the second air inlet nozzle, preferably only partially. For example, the connecting webs merge into one another.

[0038] Preferably, the second connecting web has a first partial web and a second partial web, which are arranged on opposite sides of the second air connection spigot and which each directly adjoin or merge into the first connecting web. In this respect, the two partial webs of the second connecting web are connected to each other via the first connecting web. Both the first and second connecting webs originate from the base body of the air connection housing, in which the flow channels of the air connection spigots are formed. During installation of the ventilation unit, the connecting webs are placed against the corresponding webs of the ventilation unit housing, so that, during normal operation of the ventilation unit and taking into account typical leakage, a tight connection is created between them. This allows for simple and quick installation of the air connection device on the ventilation unit housing.

[0039] A further development of the invention provides that an outer surface of the first connecting rib rests in a sealing, area-like contact with an inner surface of the first counter-rib, and the second connecting rib is attached to the second counter-rib in such a way that the first connecting rib is pressed against the first counter-rib. The outer surface of the first connecting rib is located on a side of the first connecting rib facing the external environment, and the inner surface is located on a side of the first counter-rib facing the airflow chamber. After the ventilation unit is installed, the outer and inner surfaces lie in full contact to create a tight seal. To maintain this connection, the second connecting rib and the second counter-rib are attached to each other in such a way that the first connecting rib is pressed against, or held in place by, the first counter-rib.Fasteners connecting the second connecting web and the second counter web exert a holding force such that the first connecting web is forced towards the first counter web. This ensures a sufficient seal for the ventilation unit.

[0040] The invention also relates to a method for mounting a ventilation unit, in particular a ventilation unit as described in this description, wherein the ventilation unit has an air connection device. The air connection device is preferably also designed as described in this description. The method is characterized in that the air connection device has a first air connection nozzle and a second air connection nozzle angled relative to the first air connection nozzle, which are formed by a common air connection housing, each have an outer air connection opening and an inner air connection opening, and each is connected via its inner air connection opening to a flow space that is at least partially limited by the air connection housing, wherein an actuating element is movably mounted on the air connection housing.which in a first position restricts airflow more to the second air connection than to the first, and in a second position restricts airflow more to the first than to the second, wherein the actuating element is moved to a position selected from the first and second positions, and subsequently the air connection device is connected to a ventilation unit housing of the ventilation unit. Reference is again made to the explanations in this description regarding the advantages and possible advantageous further developments of the method, the ventilation unit, and the air connection device.

[0041] A further development of the invention provides that the air connection device is detached from the ventilation unit housing, the actuator is moved to the position selected from the first and second positions, and then the air connection device is reconnected to the ventilation unit housing. For example, the ventilation unit is delivered pre-assembled, i.e., with the air connection device already attached to the ventilation unit housing. Accordingly, the actuator is in one of the positions, either the first or the second position. However, if the actuator is required in the other position, the air connection device is detached from the ventilation unit housing, so that the actuator is free to be moved. The actuator is then moved to the required position, i.e., either the first or the second position.The air connection device is then reconnected to the ventilation unit housing so that the actuator is fixed in the selected or required position.

[0042] The features and combinations of features described in the description, in particular those described in the following figure description and / or shown in the figures, can be used not only in the combinations specified, but also in other combinations or individually, without departing from the scope of the invention. Thus, embodiments that are not explicitly shown or explained in the description and / or the figures, but which emerge from or can be derived from the explained embodiments, are also to be considered as encompassed by the invention.

[0043] The invention is explained in more detail below with reference to the exemplary embodiments shown in the drawing, without limiting the invention. The drawing shows: Figure 1 is a schematic representation of a ventilation unit with an air connection device in a first view, Figure 2 is a schematic representation of the ventilation unit in a second view, Figure 3 is a representation of the air connection device in a first view with a first position of an actuating element, Figure 4 is a schematic representation of the air connection device in a first view with a second position of the actuating element, Figure 5 is a schematic representation of the air connection device in a second view with the first position of the actuating element, and Figure 6 is a schematic representation of the air connection device in the second view with the second position of the actuating element.

[0044] The Figure 1Figure 1 shows a schematic representation of a ventilation unit 1, which is designed and configured, for example, for installation in a surface-mounted or flush-mounted housing. The ventilation unit 1 has a housing 2 with an air inlet connection 3. A fan chamber located within the housing 2 is aerodynamically connected to the outside environment via the air inlet connection 3. For example, a cover is provided on the housing 2 that extends over the air inlet connection 3, specifically towards the interior of a building. Preferably, the cover extends not only over the housing 2 but also over the surface-mounted or flush-mounted housing in which the ventilation unit 1 is installed.The ventilation unit housing 2 also contains a flow channel through which an air connection device 4 is fluidically connected to the fan chamber and thus to the air inlet connection 3. In the embodiment shown here, the air connection device 4 is designed as an air outlet connection device.

[0045] The air connection device 4 has a first air connection nozzle 5 and a second air connection nozzle 6. The air connection nozzles 5 and 6 are enclosed within a common air connection housing 7. The first air connection nozzle 5 has a first external air connection opening 8, and the second air connection nozzle 6 has a second external air connection opening 9. The first air connection opening 8 is fluidically connected via a first flow channel of the first air connection nozzle 5 to a flow chamber 10 (not shown here); the second air connection opening 9 is fluidically connected to the flow chamber 10 via a second flow channel formed within the second air connection nozzle 6. The flow chamber 10 is jointly bounded by the air connection housing 7 and the ventilation unit housing 2.For this purpose, a first connecting web 11 of the air connection housing 7 rests against a first counter web 12 of the ventilation unit housing 2. Simultaneously, a second connecting web 13 of the air connection housing 7 is connected to a second counter web 14 of the ventilation unit housing 2 in such a way that the first connecting web is pressed against the first counter web 12. Fastening elements 15, by means of which the air connection housing 7 is attached to the ventilation unit housing 2 and the second connecting web 13 to the second counter web 14, respectively, act in the corresponding direction to achieve this.

[0046] The Figure 2Figure 1 shows a schematic representation of the ventilation unit in a second view. It can be seen that the air inlet opening 8 is completely and continuously bounded by a first wall section 16, a second wall section 17, a third wall section 18, and a fourth wall section 19. Similarly, the second air inlet opening 9 is completely and continuously enclosed by a first wall section 20, a second wall section 21, a third wall section 22, and a fourth wall section 23. The first wall sections 16 and 20, as well as the second wall sections 17 and 21, are each completely straight and parallel to each other. The third wall sections 18 and 22 are curved or arc-shaped for both air inlet openings 8 and 9. In the illustrated embodiment, they are semicircular.For the first air inlet opening 8, the fourth wall section 19 is straight, while for the second air inlet opening 9 it is curved or arc-shaped. Accordingly, the second air inlet opening 9 has a larger flow cross-section than the first air inlet opening 8.

[0047] The Figure 3Figure 1 shows the air connection device 4 separately from the ventilation unit 1 in a first view with an actuator 24 in a first position. It can be seen that, due to the straight design of the fourth wall section 19, the actuator 24 is connected via a film hinge 25. The actuator 24 is rotatably mounted on the air connection housing 7 about an axis of rotation via the film hinge 25. The actuator 24 extends from the film hinge 25 and, correspondingly, from the first air connection opening 8 towards the flow chamber 10. It completely passes through the first air connection nozzle 5 and projects from it into the flow chamber 10. In its first position, the actuator 24 closes the second air connection nozzle 6 towards the flow chamber 10. For this purpose, it completely covers the second air connection nozzle 6 and the flow channel within it.

[0048] The Figure 4 Figure 1 shows a schematic representation of the air connection device 4 in the first view with the actuator 24 in a second position. In the second position, the actuator 24 opens the second air connection nozzle 6 towards the flow chamber 10. However, it at least partially, and in particular only partially, obstructs the first air connection nozzle 5. To achieve complete closure of the first air connection nozzle 5 in the second position of the actuator 24, the ventilation unit housing 2 is designed such that the airflow connection between the first air connection nozzle 5 and the flow chamber 10 is blocked as soon as the air connection device 4 is properly mounted on the ventilation unit 1 or its ventilation unit housing 2.

[0049] The Figure 5Figure 1 shows the air connection device 4 in a second view with the actuating element 24 in its first position. It is evident that the second connection web 13 consists of two sub-webs 26 and 27, which are arranged parallel and spaced apart from each other, namely on opposite sides of the second air connection nozzle 6 and the flow chamber 10, respectively. Both sub-webs 26 and 27 merge into the first connection web 11, so that they are connected to each other via it. For example, they are perpendicular to the connection web 11. It is also again evident that the actuating element 24, in its first position, blocks the second air connection nozzle 6 and interrupts the flow connection between the second air connection nozzle 6 and the flow chamber 10.

[0050] The Figure 6Figure 1 shows a schematic representation of the air connection device 4 in the second view, with the actuator 24 in its second position. In this position, the flow connection between the second air connection nozzle 6 and the flow chamber 10 is open, whereas the flow connection between the first air connection nozzle 5 and the flow chamber 10 is at least partially blocked. A complete interruption of the flow connection between the first air connection nozzle 5 and the flow chamber 10 is achieved in the second position of the actuator 24 through the interaction of the actuator 24, the air connection housing 7, and the ventilation unit housing 2. Accordingly, the ventilation unit 1 is connected via the second air connection nozzle 6.

[0051] With the described design of the ventilation unit 1 and the air inlet connection 3, flexible installation of the ventilation unit 1 is possible, as different flow directions, in particular different outlet directions, can be implemented. For this purpose, only the actuator 24 needs to be moved between its different positions. It is designed that the actuator 24 is fixed in its current position when the air connection device 4 is mounted on the ventilation unit 1, so that no additional means are required to secure the actuator 24. This further simplifies the installation of the ventilation unit 1. REFERENCE MARK LIST

[0052] 1. Ventilation unit 2. Ventilation unit housing 3. Air inlet connection 4. Air connection device 5. Air connection spigot 6. Air connection spigot 7. Air connection housing 8. External air connection opening 9. External air connection opening 10. Flow space 11. Connection web 12. Counter web 13. Connection web 14. Counter web 15. Fastening device 16. Wall section 17. Wall section 18. Wall section 19. Wall section 20. Wall section 21. Wall section 22. Wall section 23. Wall section 24. Actuator 25. Film hinge 26. Partial web 27. Partial web

Claims

1. Air connection device (4) for a ventilation unit (1), characterized by a first air connection nozzle (5) and a second air connection nozzle (6) angled relative to the first air connection nozzle (5), which are formed by a common air connection housing (7), each have an outer air connection opening (8, 9) and an inner air connection opening and each are connected via their inner air connection opening to a flow space (10) which is at least partially limited by the air connection housing (7), wherein an actuating element (24) is displaceably mounted on the air connection housing (7), which in a first position closes the second air connection nozzle (6) more fluidly than the first air connection nozzle (5) and in a second position closes the first air connection nozzle (5) more fluidly than the second air connection nozzle (6).

2. Air connection device according to claim 1, characterized by the fact that the actuating element (24) is in the form of an actuating flap and is rotatably mounted on the air connection housing (7) about an actuating flap rotation axis.

3. Air connection device according to one of the preceding claims, characterized by the fact that the actuating element (24) extends at least partially through the first air connection nozzle (5).

4. Air connection device according to one of the preceding claims, characterized by the fact that the first air connection nozzle (5) and the second air connection nozzle (6) are designed as a single piece and made of a single material.

5. Air connection device according to one of the preceding claims, characterized by the fact thatthe outer air connection opening (8) of the first air connection nozzle (5) and the outer air connection opening (9) of the second air connection nozzle (6) are bounded in cross-section by several wall sections (16, 17, 18, 19, 20, 21, 22, 23), wherein a first of the wall sections (16, 17, 18, 19, 20, 21, 22, 23) and a second of the wall sections (16, 17, 18, 19, 20, 21, 22, 23) are straight and arranged parallel to each other and / or a third of the wall sections (16, 17, 18, 19, 20, 21) connecting the first wall section (16, 20) and the second wall section (17, 21) is curved.

6. Air connection device according to one of the preceding claims, characterized by the fact thata fourth of the wall sections (16, 17, 18, 19, 20, 21, 22, 23) connecting the first wall section (16, 20) and the second wall section (17, 21) is straight for the first air connection nozzle (5) and / or curved for the second air connection nozzle (6).

7. Ventilation unit (1) with an air connection device (4), in particular an air connection device (4) according to one or more of the preceding claims, characterized by the fact thatThe air connection device (4) has a first air connection nozzle (5) and a second air connection nozzle (6) angled relative to the first air connection nozzle (5), which are formed by a common air connection housing (7), each have an outer air connection opening (8, 9) and an inner air connection opening and are each connected via their inner air connection opening to a flow space (10) which is at least partially limited by the air connection housing (7), wherein an actuating element (24) is displaceably mounted on the air connection housing (7), which in a first position closes the second air connection nozzle (6) more fluidly than the first air connection nozzle (5) and in the second position closes the first air connection nozzle (5) more fluidly than the second air connection nozzle (6).

8. Ventilation device according to claim 7, characterized by the fact thatthe air connection housing (7) is attached to a ventilation unit housing (2) of the ventilation unit (1) in such a way that the flow space (10) is jointly limited by the air connection housing (7) and the ventilation unit housing (2).

9. Ventilation device according to one of the preceding claims, characterized by the fact that the actuating element (24) projects into the ventilation unit housing (2), in its first position for fixing in the first position against a first wall area of ​​a wall of the ventilation unit housing (2) and in its second position for fixing in the second position against a second wall area of ​​the wall of the ventilation unit housing (2).

10. Ventilation device according to one of the preceding claims, characterized by the fact thatThe wall of the ventilation unit housing (2) in the first position rests against the actuator (24) and the air connection housing (7) in such a way that a first flow-technical connection between the first air connection nozzle (5) and the flow chamber (10) is released and a second flow-technical connection between the second air connection nozzle (6) and the flow chamber (10) is interrupted, and in the second position rests against the actuator (24) and the air connection housing (7) in such a way that the first flow-technical connection between the first air connection nozzle (5) and the flow chamber (10) is interrupted and the second flow-technical connection between the second air connection nozzle (6) and the flow chamber (10) is released.

11. Ventilation device according to one of the preceding claims, characterized by the fact thatin the ventilation unit housing (2) an air inlet connection (3) is located apart from the air connection device (4) and the air connection device (4) is designed as an air outlet connection device.

12. Ventilation device according to one of the preceding claims, characterized by the fact that the inner air connection opening of the first air connection nozzle (5) is partially limited by a first connection web (11) and the inner air connection opening of the second air connection nozzle (6) is partially limited by a second connection web (13) angled relative to the first connection web (11), wherein the first connection web (11) is in sealing contact with a first counter web (12) and the second connection web (13) is in sealing contact with a second counter web (14) of the ventilation unit housing (2).

13. Ventilation device according to one of the preceding claims, characterized by the fact thatan outer surface of the first connecting web (11) lies flush against an inner surface of the first counter web (12) and the second connecting web (13) is attached to the second counter web (14) in such a way that the first connecting web (11) is pressed against the first counter web (12).

14. Method for mounting a ventilation device (1), in particular a ventilation device (1) according to one or more of claims 7 to 13, wherein the ventilation device (1) has an air connection device (4), characterized by the fact thatThe air connection device (4) has a first air connection nozzle (5) and a second air connection nozzle (6) angled relative to the first air connection nozzle (5), which are formed by a common air connection housing (7), each have an outer air connection opening (8, 9) and an inner air connection opening and are each connected via their inner air connection opening to a flow space (10) which is at least partially limited by the air connection housing (7), wherein an actuating element (24) is displaceably mounted on the air connection housing (7), which in a first position closes the second air connection nozzle (6) more fluidly than the first air connection nozzle (5) and in the second position closes the first air connection nozzle (5) more fluidly than the second air connection nozzle (6),wherein the actuating element is moved to a position selected from the first position and the second position and then the air connection device (4) is connected to a ventilation unit housing (2) of the ventilation unit (1).

15. Method according to claim 14, characterized by the fact that The air connection device (4) is detached from the ventilation unit housing (2), the actuating element (24) is moved to the position selected from the first position and the second position, and then the air connection device (4) is reconnected to the ventilation unit housing (2) of the ventilation unit (1).

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