Air conditioning system for a motor vehicle, motor vehicle with an air conditioning system and method for operating an air conditioning system

Abstract

Air conditioning device (1) for a motor vehicle, comprising an air distribution device (2) which has an air inlet connection (4), several air outlet connections (5, 6) and an air distribution flap (9) adjustable by means of an actuator (10) for adjusting flow cross-sections between the air inlet connection (4) and the air outlet connections (5, 6), wherein in a first position of the air distribution flap (9) the air inlet connection (4) is in fluid-flow communication with each of the air outlet connections (5, 6), and in a second position of the air distribution flap (9) the air inlet connection (4) is in fluid-flow communication with a first of the air outlet connections (5, 6) and is separated from a second of the air outlet connections (5, 6).6) is fluidically separated and in a third position of the air distribution flap (9) the air inlet connection (4) is fluidly connected to the second air outlet connection (6) and is fluidically separated from the first air outlet connection (5), wherein the air inlet connection (4) is located on a first housing part (7) of a housing (3) of the air distribution device (2) and the air outlet connections (5, 6) are located on a second housing part (8) of the housing (3), characterized in that the housing (3) has two sealing webs (18), wherein the air distribution flap (9) engages between the sealing webs (18) in the first position and in the second position seals against a first sealing web (18) and in the third position seals against a second sealing web (18).

Description

[0001] The invention relates to an air conditioning device for a motor vehicle, comprising an air distribution device which has an air inlet connection, several air outlet connections and an air distribution flap adjustable by means of an actuator for adjusting flow cross-sections between the air inlet connection and the air outlet connections, wherein in a first position of the air distribution flap the air inlet connection is in fluid-technical contact with each of the air outlet connections, in a second position of the air distribution flap the air inlet connection is in fluid-technical contact with a first of the air outlet connections and is fluid-technically separated from a second of the air outlet connections, and in a third position of the air distribution flap the air inlet connection is in fluid-technical contact with the second air outlet connection and is fluid-technically separated from the first air outlet connection.wherein the air inlet connection is located on a first housing part of a housing of the air distribution device and the air outlet connections are located on a second housing part of the housing. The invention further relates to a motor vehicle with an air conditioning system and to a method for operating an air conditioning system for a motor vehicle.

[0002] For example, German patent application DE 102 07 221 A1 is known from the prior art. This document describes a heating and / or air conditioning system for a vehicle interior and a method for ventilating the interior that can be implemented with it. The heating and / or air conditioning system has an air distribution device comprising a fan compartment to which at least two channels are connected, through which air can be supplied to the interior, and at least one pivotably mounted air distribution flap located in the distribution compartment. In a first position of the air distribution flap, both channels are completely closed, while in a third position it substantially opens one of the channels and substantially closes the other. It is provided that in a second position of the air distribution flap, the channels are substantially completely open.

[0003] Furthermore, EP 1 080 956 A1 discloses a device for determining the temperature and velocity of air flowing from an air outlet into the interior of a vehicle, comprising at least one temperature sensor, at least one flow sensor, and a control and evaluation unit connected to the sensors. The control and evaluation unit activates the sensors during a measurement interval and evaluates their measurement signals. The device also includes an electronic switching element that irreversibly transitions from a substantially non-conductive state to a substantially conductive state upon reaching a component-specific breakdown voltage. The switching element is connected in series with the at least one flow sensor, and the at least one temperature sensor is connected in parallel to this series connection or in parallel to the switching element as a sensor circuit.This circuit is a two-terminal device that is connected to the control and evaluation unit via only two wires.

[0004] German patent application DE 10 2021 128 926 A1 discloses a support for an instrument panel, with a base body on which at least one air guide surface is formed in certain areas, wherein at least one half-shell is arranged on the support such that the at least one air guide surface with the at least one half-shell forms at least one air channel with at least one air outlet, wherein at least one movable air guide element is arranged and designed on the at least one air guide surface to direct an airflow in the at least one air channel and through the at least one air outlet.

[0005] The prior art also includes the publication DE 198 31 472 A1.

[0006] The object of the invention is to propose an air conditioning device for a motor vehicle which has advantages over known air conditioning devices, in particular enabling a flexible supply of air into the interior of the motor vehicle in a cost-effective manner.

[0007] This is achieved according to the invention with an air conditioning device for a motor vehicle having the features of claim 1. It is provided that the housing has two sealing ribs, wherein the air distribution flap engages between the sealing ribs in the first position, and in the second position it seals against a first sealing rib, and in the third position it seals against a second sealing rib.

[0008] 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.

[0009] The air conditioning system serves to regulate the climate of the motor vehicle. Accordingly, it is preferably an integral part of the motor vehicle, but can, of course, also be separate from it, particularly until the air conditioning system is installed on and / or in the motor vehicle. Air conditioning is understood to mean adjusting the air temperature and / or humidity inside the motor vehicle. The air conditioning system preferably serves to temper the air, i.e., to adjust the air temperature, particularly towards or to a target temperature. Adjusting the air temperature includes, for example, heating and / or cooling the air. Adjusting the humidity preferably includes humidifying and / or dehumidifying the air.

[0010] To air-condition a vehicle, air is supplied to the vehicle's interior, at least temporarily. This supplied air can also be referred to as supply air. The supply air includes, for example, air drawn from the vehicle's exterior environment, which can also be called fresh air. Additionally or alternatively, the supply air contains air that was previously extracted from the vehicle's interior. This extracted air is also referred to as exhaust air. Air is supplied to the vehicle's interior via several vents, from which the supply air can flow out, or at least does flow out temporarily, thus entering the vehicle's interior.

[0011] The air outlets can be designed in any way. Preferably, they are equipped with an adjusting device by means of which the direction of airflow and / or the cross-sectional area of ​​the outlet can be adjusted, in particular manually or mechanically by means of an actuator. If the cross-sectional area is adjustable, the outlet can preferably be set to a cross-sectional area of ​​zero, i.e., the outlet can be completely closed, so that no or at most a very small amount of air enters the interior space through the outlet.

[0012] To distribute the air between and onto the air outlets, the air conditioning system includes an air distribution device. This device comprises an air inlet connection and several air outlet connections. The air inlet connection is preferably connected to an air source, ideally via an air conveying device, which conveys the air from the air source towards the air distribution device. The air source can be, for example, the outside environment and / or the interior of the vehicle. The air conveying device is, in particular, an electrically operated fan or blower.

[0013] The air outlet connections are linked to the air outlets. Specifically, each air outlet connection is linked to one of the air outlets, preferably to exactly one. However, it is also possible that at least one or more air outlet connections are each aerodynamically connected to multiple air outlets. In any case, the air outlet connections are aerodynamically linked to different air outlets. Furthermore, the air distribution device has an air distribution flap, which is adjustable by means of the actuator, i.e., it can be moved into different positions. The air distribution flap is rotatably mounted about a pivot axis and can be driven by the actuator. The positions of the air distribution flap can therefore also be described as its angular position.

[0014] The air distribution flap serves to adjust the flow cross-sections between the air inlet and the air outlet connections. Between the air inlet and each of the air outlet connections, there is one of the flow cross-sections; for example, a first flow cross-section exists between the air inlet and one of the first air inlets, and a second flow cross-section exists between the air inlet and one of the second air outlet connections. The flow cross-sections, or rather their respective cross-sectional areas, are adjustable by means of the air distribution flap. In one position of the air distribution flap, the flow cross-sections between the air inlet and the air outlet connections have specific values, and in a second position, they have different values.

[0015] The air distribution flap adjusts the flow cross-sections such that, in its first position, the air inlet is fluidically connected to each of the air outlets. The air supplied to the air distribution device through the air inlet then flows out of the device distributed across the multiple air outlets. For example, in the first position, the flow cross-sections between the air inlet and the air outlets may be equal, ensuring that the air supplied through the air inlet is distributed evenly across the outlets. However, it is also possible to have an uneven distribution in the first position, with the flow cross-sections set differently.

[0016] Furthermore, the flow cross-sections are adjusted so that in the second position of the air distribution flap, the air inlet connection is fluidically connected to the first air outlet connection, but fluidically separated from the second air outlet connection by the air distribution device. This means that the air supplied to the air distribution device via the air inlet connection exits the air distribution device completely or almost completely through the first air outlet connection, while no air, or at most a small amount, exits through the second air outlet connection, which may be due, for example, to leaks in the air distribution device.

[0017] Fluid separation is understood to mean that the flow connection between the air inlet and the second air outlet is interrupted by the air distribution device, or at least that the flow cross-section between the air inlet and the first air outlet is significantly larger than the flow cross-section between the air inlet and the second air outlet, for example by a factor of at least 10, at least 25, or at least 50. Of course, even when the air distribution flap is in its second position away from the air distribution device, a flow connection between the air inlet and the second air outlet can still exist.

[0018] Furthermore, the adjustment of the flow cross-section should be such that, in the third position of the air distribution flap, the air inlet connection is fluidically connected to the second air outlet connection, whereas it is fluidically separated from the first air outlet connection. Reference is made to the explanations for the second position. These also apply analogously to the third position.

[0019] In other words, it is generally intended that in the second position, the flow cross-section between the air inlet and the first air outlet is greater than zero, and between the air inlet and the second air outlet, it is equal to or at least nearly equal to zero. In the third position, however, the flow cross-section between the air inlet and the second air outlet is greater than zero, and the flow cross-section between the air inlet and the first air outlet is equal to or at least nearly equal to zero.

[0020] The described design of the air conditioning unit, or rather its air distribution system, allows for particularly flexible distribution of air to the air outlet connections while simultaneously requiring minimal design effort. Specifically, the air supplied to the air distribution system via the air inlet connection is provided for by temporarily distributing it to multiple air outlet connections, temporarily supplying it only to one outlet, and temporarily supplying it only to the other. The advantage of this air conditioning unit lies in the fact that the distribution of air to the multiple air outlet connections is achieved using a single air distribution damper, and consequently, only a single actuator is required to adjust this damper.This means that a high degree of flexibility in air distribution can be achieved with minimal effort in the design of the air distribution system.

[0021] The invention provides that the air inlet connection is located on a first housing part of the air distribution device housing, and the air outlet connections are located on a second housing part of the housing. The housing is thus designed in multiple parts and comprises at least the first housing part and the second housing part. The air inlet connection is completely enclosed or surrounded by the first housing part. The same preferably applies to the second housing part and the air outlet connections located thereon. The second housing part therefore completely and continuously surrounds each of the multiple air outlet connections.

[0022] Preferably, the air outlet connections are located in an imaginary plane. Edges formed by the housing that define the air outlet connections lie continuously in this same imaginary plane and are arranged offset from one another. More preferably, the air inlet connection is also located in an imaginary plane, such that an edge of the housing, which completely and continuously surrounds the air inlet connection, lies continuously and completely in this imaginary plane. Particularly preferably, the imaginary plane of the air inlet connection and the imaginary plane of the air outlet connections are arranged parallel to each other. The two housing parts are preferably each injection-molded. They are preferably made of the same material; however, a material-diverse design of the housing parts is also possible. The described design enables simple and cost-effective manufacturing.

[0023] A further development of the invention provides that the first housing part and the second housing part seal against each other via a labyrinth seal. The labyrinth seal is formed jointly by the two housing parts themselves, namely by a sealing projection of one of the housing parts engaging in a sealing receptacle of the other housing part. The sealing receptacle is preferably dimensioned such that the engaging sealing projection rests against walls on opposite sides, which define the sealing receptacle on those opposite sides. These walls are formed by the housing part in which the sealing receptacle is located. The sealing projection is preferably an edge of, or formed by, the respective housing part.

[0024] A double labyrinth seal is particularly preferred, in which each of the housing parts has a sealing receptacle and a sealing projection. The first housing part has a first sealing receptacle and a first sealing projection, and the second housing part has a second sealing receptacle and a second sealing projection. The first sealing projection engages in a sealing manner with the second sealing receptacle, and the second sealing projection engages with the first sealing receptacle. Preferably, the wall bounding one of the sealing receptacles simultaneously forms the sealing projection, or the sealing projection extends from this wall. A further preferred embodiment is one in which the sealing projection tapers towards its free end, i.e., has decreasing cross-sectional dimensions in the direction of the sealing receptacle.In this respect, the sealing projection has, for example, a sealing lug at its end that engages in the sealing receptacle. This ensures a particularly tight connection between the two housing parts.

[0025] A further development of the invention provides that the air distribution flap is mounted on a drive shaft rotatably attached to the first housing part and is coupled to the actuator located outside the housing. The air distribution flap is connected to the actuator via the drive shaft. Due to the actuator's location outside the housing, the flow cross-section within the housing is not reduced, thus ensuring low flow resistance and a high airflow rate through the air distribution device.

[0026] A further development of the invention provides that the housing has at least one sealing surface against which the air distribution flap bears in a flat, sealing manner in the second and / or third position. The sealing surface is understood to be a surface located on the inside of the housing with which the air distribution flap is in contact in at least one of the two aforementioned positions. The sealing surface and the air distribution flap are designed such that the contact of the air distribution flap against the sealing surface is flat, i.e., contact occurs in particular in two mutually perpendicular directions. Preferably, the air distribution flap bears against the sealing surface in the axial direction with respect to the axis of rotation of the air distribution flap over at least 80%, at least 90%, or completely across the inner dimensions of the housing.

[0027] Preferably, different housing sealing surfaces are assigned to the second and third positions of the air distribution flap. For example, in the second position, the air distribution flap rests against a first housing sealing surface, and in the third position, it rests against a second housing sealing surface located at a distance from the first. This full-surface contact of the air distribution flap with the housing sealing surface results in particularly effective distribution of air to the multiple air outlet connections.

[0028] A further development of the invention provides that the housing sealing surface is formed by a change in the cross-sectional area of ​​the airflow through the housing. In the region of the housing sealing surface, the cross-sectional area of ​​the airflow through the housing changes in the main airflow direction. In particular, the cross-sectional area decreases from the direction of the air inlet connection towards the air outlet connections. The housing sealing surface preferably lies completely in an imaginary plane that forms an angle with a longitudinal center axis of the housing or the first housing part, which is greater than 0° and less than 180°. Particularly preferably, the angle is at least 15° and at most 75°, at least 30° and at most 60°, or approximately or exactly 45°.The production of the housing sealing surface by means of the change in the flow cross-section of the housing enables, on the one hand, a particularly reliable seal between the sealing lip and the housing and, on the other hand, simple manufacturability.

[0029] The invention provides that the housing has two sealing ribs, wherein the air distribution flap engages between the sealing ribs in the first position, and in the second position, it seals against a first sealing rib, and in the third position, it seals against a second sealing rib. The sealing ribs are spaced apart from each other, preferably with the air outlet connections oriented towards the air inlet connection. They are arranged such that the air distribution flap engages between them at least temporarily; preferably, the air distribution flap is positioned between the sealing ribs in every position. In the first position, the air distribution flap is preferably spaced apart from both sealing ribs, particularly as seen in cross-section through the air distribution flap.

[0030] In the second and third positions, the air distribution flap rests against different sealing surfaces, thus achieving a seal. For example, in the second and third positions, the air distribution flap rests against the housing, specifically the housing sealing surface, on one side and against one of the sealing surfaces on the other. This results in a particularly high level of airtightness for the air distribution device, ensuring that the air is distributed very effectively to the air outlet connections or directed to the desired air outlet.

[0031] A further development of the invention provides that the sealing lip has a sealing head with two flap sealing surfaces angled relative to each other, which bear against different sealing webs in different positions of the air distribution flap, or that the air distribution flap has a sealing element which bears against different sealing webs in different positions of the air distribution flap. In cross-section with respect to the axis of rotation of the air distribution flap, the sealing head has, for example, a triangular or trapezoidal shape. It has the flap sealing surfaces, each of which lies completely in an imaginary plane, and the imaginary planes are angled relative to each other. For example, the angle between the planes is at least 60° and at most 120°, at least 75° and at most 105°, or approximately or exactly 90°.The flap sealing surfaces are preferably designed such that, in one of the positions, they bear in full contact with one of the sealing ribs. Full contact means surface contact, not merely line contact. This results in a particularly good sealing effect of the air distribution flap in conjunction with the housing.

[0032] Alternatively, the sealing element is a component of the air distribution flap. The sealing element preferably consists of a sealing material, in particular a material that has lower stiffness and / or higher elasticity than the material of the air distribution flap. The sealing element can also be referred to as a sealing projection or is present as such. In particular, it is designed such that its side located radially outside the axis of rotation, i.e., its free end, abuts the flap sealing surfaces or one of the flap sealing surfaces in a sealing manner.

[0033] A further development of the invention provides that the air distribution flap comprises a base body and a seal arranged on the base body for sealing contact with the housing sealing surface, wherein the base body and the seal are made of different materials. The material of the base body, for example, has a higher strength or lower elasticity than the material of the seal. The seal forms, for example, a sealing lip that extends in the direction away from the base body. It may be provided that the seal partially surrounds the base body and is thus held to the base body at least positively and / or force-fit. However, it is particularly preferred that the seal is materially bonded to the base body, in particular by manufacturing the air distribution flap, and thus the base body and the seal, in a two-component injection molding process.

[0034] The seal is located, in particular, on a side of the air distribution flap or the base body facing away from the sealing head. Specifically, the seal and the sealing head are arranged on opposite sides of the air distribution flap's axis of rotation. Preferably, in both the second and third positions, the seal and the sealing head are in sealing contact with the respective housing sealing surface or sealing rib. This results in a particularly good sealing effect and thus effective air distribution by the air distribution device.

[0035] The invention further relates to a motor vehicle with an air conditioning system, in particular an air conditioning system as described in this description, wherein the air conditioning system has an air distribution device which has an air inlet connection fluidly connected to an air conveying device of the air conditioning system, several air outlet connections fluidly connected to outlets of the air conditioning system, and an air distribution flap adjustable by means of an actuator for adjusting flow cross-sections between the air inlet connection and the air outlet connections, wherein in a first position of the air distribution flap the air inlet connection is fluidly connected to each of the air outlet connections.In a second position of the air distribution flap, the air inlet connection is fluidically connected to a first air outlet connection and fluidically separated from a second air outlet connection. In a third position of the air distribution flap, the air inlet connection is fluidly connected to the second air outlet connection and fluidically separated from the first air outlet connection. The air inlet connection is located on a first housing part of the air distribution device housing, and the air outlet connections are located on a second housing part. Furthermore, the housing has two sealing ribs. In the first position, the air distribution flap engages between the sealing ribs. In the second position, it seals against the first sealing rib, and in the third position, it seals against the second sealing rib.

[0036] The advantages of such a design of the motor vehicle or the air conditioning system have already been pointed out.

[0037] Both the motor vehicle and the air conditioning system may be further developed as described in this document, and reference is made to these details.

[0038] The invention further relates to a method for operating an air conditioning system for a motor vehicle, in particular an air conditioning system according to the present description, wherein the air conditioning system has an air distribution device which has an air inlet connection, several air outlet connections and an air distribution flap which is at least temporarily displaced by means of an actuator for adjusting flow cross-sections between the air inlet connection and the air outlet connections, wherein in a first position of the air distribution flap the air inlet connection is in fluid-technical contact with each of the air outlet connections,In a second position of the air distribution flap, the air inlet connection is fluidically connected to a first air outlet connection and fluidically separated from a second air outlet connection. In a third position of the air distribution flap, the air inlet connection is fluidically connected to the second air outlet connection and fluidically separated from the first air outlet connection. The air inlet connection is located on a first housing part of the air distribution device housing, and the air outlet connections are located on a second housing part. Furthermore, the housing has two sealing ribs. In the first position, the air distribution flap engages between the sealing ribs. In the second position, it seals against the first sealing rib, and in the third position, it seals against the second sealing rib.

[0039] Reference is again made to the explanations in the present description regarding the advantages and possible advantageous designs.

[0040] 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.

[0041] 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: Fig. 1. A schematic representation of an area of ​​an air conditioning system for a motor vehicle in a first view, as well as Fig. 2 A schematic representation of the area, the air conditioning unit in a second view.

[0042] The Fig. Figure 1 shows a schematic representation of a section of an air conditioning system 1 for a motor vehicle, more precisely an air distribution unit 2 of the air conditioning system 1, in a first view. The air distribution unit 2 has a housing 3 on which, or in which, an air inlet connection 4, a first air outlet connection 5, and a second air outlet connection 6 are provided. Preferably, the housing 3 is designed in multiple parts and comprises a first housing part 7 and a second housing part 8. The air inlet connection 4 is located in the first housing part 7, and the air outlet connections 5 and 6 are located in the second housing part 8.

[0043] Furthermore, an air distribution flap 9 is arranged in the housing 3, which can be rotated about a rotary axis 11 by means of an actuator 10 (not shown). In a first position of the air distribution flap 9 shown here, air supplied via the air inlet connection 4 of the air distribution device 2 is distributed to the air outlet connections 5 and 6, wherein preferably the flow cross-sections or flow cross-sectional areas between the air inlet connection 4 and the air outlet connections 5 and 6 are identical or at least similar in size. The air distribution flap 9 and the actuator 10 are connected to each other, for example, via a drive shaft 12.

[0044] The air distribution flap 9 is designed in multiple parts and comprises a base body 13 and a seal 14. The base body 13 and the seal 14 are preferably made of different materials, with the seal 14 being made of a sealing material that has a higher flexibility than the material of the base body 13. Preferably, the base body 13 and the seal 14 are bonded together, for example, they are manufactured during a single manufacturing process.

[0045] The seal 14 rests against a housing sealing surface 15 in at least one position of the air distribution flap 9, wherein, in the illustrated embodiment, two housing sealing surfaces 15 are located on opposite sides of the air distribution flap 9. In a second position, the air distribution flap 9 with its seal 14 rests against one of the housing sealing surfaces 15, and in a third position, against another of the housing sealing surfaces 15. The housing sealing surfaces 15 are angled relative to a longitudinal center axis or a longitudinal center plane of the housing 3, wherein the longitudinal center axis preferably intersects the axis of rotation 11 perpendicularly, and the longitudinal center plane preferably completely encompasses the axis of rotation 11.

[0046] On the side of the base body 13 facing away from the seal 14, a sealing head 16 with two flap sealing surfaces 17 is arranged. The sealing head 16 is located between two sealing webs 18 of the housing 3 in at least one position of the air distribution flap 9, and in particular in all positions occurring during normal operation of the air conditioning unit 1. Preferably, the sealing webs 18 have thickenings on their side facing the sealing head 16. In different positions of the air distribution flap 9, the sealing head 16 rests against different sealing webs 18, in particular against their thickenings.

[0047] In the second position, the air distribution flap 9 rests with its seal 14 against a first of the housing sealing surfaces 15 and with its sealing head 16 against a first of the sealing ribs 18. In the third position, its seal 14 rests with a second of the housing sealing surfaces 15 and its sealing head 16 against a second of the sealing ribs 18. In the second and third positions, a flow connection is established between the air inlet port 4 and each of the air outlet ports 5 and 6, while the flow connection between the air inlet port 4 and each of the other air outlet ports 5 and 6 is interrupted.

[0048] The two housing parts 7 and 8 are hermetically connected to each other via a labyrinth seal 19. For this purpose, the first housing part has a first sealing projection 20 and a first sealing receptacle 21, and the second housing part 8 has a second sealing projection 22 and a second sealing receptacle 23. The first sealing projection 20 engages in the second sealing receptacle 23, and the second sealing projection 22 engages in the first sealing receptacle 21, specifically such that the respective sealing projection 20 or 22, viewed in cross-section, rests against walls that delimit the respective sealing receptacle 21 or 23 on opposite sides.

[0049] The Fig.Figure 2 shows a schematic representation of the area of ​​the air conditioning unit 1 or the air distribution unit 2 in a second view. In addition to the elements already mentioned and described, the actuator 10, which serves to move the air distribution flap 9 between its positions, is visible. The actuator 10 is covered by a cover 24, which is attached to the housing 3.

[0050] With the described design of the air conditioning unit 1 or air distribution unit 2, effective distribution of the air supplied to the air distribution unit 2 via the air inlet connection 4 to the air outlet connections 5 and 6 is possible, whereby the proportion of air between the air outlet connections 5 and 6 can be adjusted by means of the air distribution flap 9. In particular, the flow connections between the air inlet connection 4 and the air outlet connections 5 and 6 can each be interrupted, so that one of the air outlet connections 5 or 6 is fluidically separated from the air inlet connection 4 in a given position of the air distribution flap 9. REFERENCE MARK LIST: 1 air conditioning unit 2 Air distribution device 3 cases 4 Air intake connection 5 1. Air outlet connection 6 2. Air outlet connection 7 1. Housing part 8 2. Housing part 9 Air distribution flap 10 Actuator 11 axis of rotation 12 Drive shaft 13 basic shapes 14 Seal 15 Housing sealing surface 16 Sealing head 17 flap sealing surface 18 sealing bridge 19 Labyrinth seal 20 1. Sealing projection 21 1. Seal receptacle 22 2. Sealing projection 23 2. Seal receptacle 24 coverage

Claims

[1] Air conditioning device (1) for a motor vehicle, comprising an air distribution device (2) which has an air inlet connection (4), several air outlet connections (5, 6) and an air distribution flap (9) adjustable by means of an actuator (10) for adjusting flow cross-sections between the air inlet connection (4) and the air outlet connections (5, 6), wherein in a first position of the air distribution flap (9) the air inlet connection (4) is in fluid-flow communication with each of the air outlet connections (5, 6), and in a second position of the air distribution flap (9) the air inlet connection (4) is in fluid-flow communication with a first of the air outlet connections (5, 6) and is separated from a second of the air outlet connections (5, 6).6) is fluidically separated and in a third position of the air distribution flap (9) the air inlet connection (4) is fluidly connected to the second air outlet connection (6) and is fluidically separated from the first air outlet connection (5), wherein the air inlet connection (4) is located on a first housing part (7) of a housing (3) of the air distribution device (2) and the air outlet connections (5, 6) are located on a second housing part (8) of the housing (3), , characterized by , that the housing (3) has two sealing bars (18), wherein the air distribution flap (9) engages between the sealing bars (18) in the first position, and in the second position it seals against a first of the sealing bars (18) and in the third position it seals against a second of the sealing bars (18). [2] Air conditioning device (1) according to claim 1, characterized by, that the air distribution flap (9) is mounted on a drive shaft (12) rotatably mounted on the first housing part (7), which is coupled to the actuator (10) arranged outside the housing (3) in terms of drive technology. [3] Air conditioning device (1) according to any one of the preceding claims, characterized by , that the housing (3) has at least one housing sealing surface (15) against which the air distribution flap (9) bears in a flat sealing contact in the second position and / or in the third position. [4] Air conditioning device (1) according to claim 3, characterized by , that the housing sealing surface (15) is formed by a change in the flow cross-section of the housing (3). [5] Air conditioning device (1) according to any one of the preceding claims, characterized by, that the air distribution flap (9) has a sealing head (16) with two flap sealing surfaces (17) angled towards each other, which in different positions of the air distribution flap (9) bear against different sealing webs (18), or that the air distribution flap (9) has a sealing element which in different positions of the air distribution flap (9) bears against different sealing webs (18). [6] Air conditioning device (1) according to claim 3 or 4, characterized by , that the air distribution flap (9) has a base body (13) and a seal (14) arranged on the base body (13) for sealing contact with the housing sealing surface (15), wherein the base body (13) and the seal (14) are made of different materials. [7] Motor vehicle with an air conditioning device (1), in particular an air conditioning device (1) according to one or more of the preceding claims, wherein the air conditioning device (1) has an air distribution device (2) which has an air inlet connection (4) fluidically connected to an air conveying device of the air conditioning device (1), several air outlet connections (5, 6) fluidically connected to outlets of the air conditioning device (1), and an air distribution flap (9) adjustable by means of an actuator (10) for adjusting flow cross-sections between the air inlet connection (4) and the air outlet connections (5, 6), wherein in a first position of the air distribution flap (9) the air inlet connection (4) is fluidically connected to each of the air outlet connections (5, 6),In a second position of the air distribution flap (9), the air inlet connection (4) is fluidically connected to a first of the air outlet connections (5, 6) and fluidically separated from a second of the air outlet connections (5, 6), and in a third position of the air distribution flap (9), the air inlet connection (4) is fluidly connected to the second air outlet connection (6) and fluidically separated from the first air outlet connection (5), wherein the air inlet connection (4) is located on a first housing part (7) of a housing (3) of the air distribution device (2) and the air outlet connections (5, 6) are located on a second housing part (8) of the housing (3). characterized by, that the housing (3) has two sealing bars (18), wherein the air distribution flap (9) engages between the sealing bars (18) in the first position, and in the second position it seals against a first of the sealing bars (18) and in the third position it seals against a second of the sealing bars (18). [8] Method for operating an air conditioning unit (1) for a motor vehicle, in particular an air conditioning unit (1) according to one or more of claims 1 to 6, wherein the air conditioning unit (1) has an air distribution unit (2) which has an air inlet connection (4), several air outlet connections (5, 6) and an air distribution flap (9) which is displaced at least temporarily by means of an actuator (10) for adjusting flow cross-sections between the air inlet connection (4) and the air outlet connections (5, 6), wherein in a first position of the air distribution flap (9) the air inlet connection (4) is in fluid-technical communication with each of the air outlet connections (5, 6), in a second position of the air distribution flap (9) the air inlet connection (4) is in fluid-technical communication with a first of the air outlet connections (5, 6) and is separated from a second of the air outlet connections (5, 6).6) is fluidically separated and in a third position of the air distribution flap (9) the air inlet connection (4) is fluidly connected to the second air outlet connection (6) and is fluidically separated from the first air outlet connection (5), wherein the air inlet connection (4) is located on a first housing part (7) of a housing (3) of the air distribution device (2) and the air outlet connections (5, 6) are located on a second housing part (8) of the housing (3), , characterized by , that the housing (3) has two sealing bars (18), wherein the air distribution flap (9) engages between the sealing bars (18) in the first position, and in the second position it seals against a first of the sealing bars (18) and in the third position it seals against a second of the sealing bars (18).

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