Air outlet for vehicle

Abstract

The invention relates to an air outlet (1) for a vehicle, wherein the air outlet (1) comprises: a housing (2); and at least one air flow control and / or air flow deflection element (7, 8) housed at least partially or partially in the housing (2), the latter being mounted in a movable and in particular pivotable manner relative to the housing (2) in order to deflect the air flow flowing through the air channel (6) from the main flow direction (H) as required at least at the air outlet of the air outlet (1). According to the invention, in particular, it is proposed that the air outlet (1) comprises means configured to eliminate or at least reduce or weaken the Coanda effect, which is generated in particular in the region of the inner wall of the housing (2) and / or in the at least one air flow control and / or air flow deflection element (7, 8) when the air flow deflects from the main flow direction (H). 8) and / or an airflow-conducting wall region created inside and / or outside the housing (2).

Description

[0001] This invention relates to an air vent for a vehicle, and more particularly to an air vent for a vehicle ventilation system. Furthermore, this invention relates to a ventilation system having such an air vent.

[0002] In ventilation systems used in vehicles, air vents or air outlet nozzles are typically used to allow for targeted control of the escaping airflow. Such vents are used, in particular, to supply fresh air to the vehicle's interior space.

[0003] Here, air flows through the inlet opening at the air inlet area of ​​the air outlet into the air passage defined by the housing wall of the air outlet, passes through this air passage, and finally flows into the interior space of the vehicle (e.g., a car or truck) through the outlet opening at the air outlet area of ​​the air outlet. Here, the airflow generally follows a main flow direction, which in particular can extend at least generally parallel to the longitudinal axis of the housing of the air outlet.

[0004] In known air outlets, airflow is deflected from the main flow direction by one or more air guiding elements (e.g., pivotable air guiding fins). In addition to air guiding fins, the housing of the air outlet that defines the air passage can also be used to deflect air from the main flow direction.

[0005] For example, it is known that the housing walls of these air outlets extend toward each other or are separated from each other in an arc shape, at least in the air inlet region or air outlet region, wherein the airflow toward the arc-shaped housing walls due to the air guiding elements follows the arc shape and is thus deflected accordingly.

[0006] Such air outlets are known, for example, from DE 20 2015 102 026 U1 and DE 10 2017 111 011 A1.

[0007] Furthermore, see reference DE 20 2013 012 285 U1. In such an air outlet known in the prior art, the two opposing shell walls of the air outlet housing are designed with an arcuate structure. An air guiding element is arranged in the air outlet housing, the air guiding element having a first air guiding surface and a second air guiding surface opposite to the first air guiding surface, wherein the shell and the first air guiding surface form a first air passage, and the shell and the second air guiding surface form a second air passage. The first air passage is configured to deliver a first volumetric flow rate of air that can flow into the shell through the air inlet opening to the air outlet opening, while the second air passage is configured to deliver a second volumetric flow rate of air that can flow into the shell through the air inlet opening to the air outlet opening.

[0008] Furthermore, in the air outlet known from document DE 20 2013 012 285 U1, an airfoil element is arranged within the housing, wherein the airfoil element is movably arranged in the air inlet section between the air inlet opening and the end of the air guiding element facing the air inlet opening. The movability of the airfoil element is designed to adjust the direction of the air flowing out at the air outlet opening according to the position of the airfoil element.

[0009] In particular, the operation of the air outlet known from document DE 20 2013 012 285 U1 is based on the fact that air deflection is achieved by changing the volumetric flow rate (first volumetric flow rate and second volumetric flow rate) of two air channels formed by means of an air guiding element. In the known air outlet, the desired air deflection of the air flowing out of the air outlet region is generally achieved by adjusting or changing the ratio of the volumetric flow rates flowing through the first air channel and the second air channel.

[0010] However, it has been demonstrated here that the mechanism proposed in DE 20 2013 012 285 U1 for causing air deflection reduces the performance of the outlet, namely, reduces the volumetric flow rate that can be discharged from the outlet per unit time and / or the "quality" of the volumetric flow rate that can be discharged from the outlet, especially in terms of airflow fanning and orientation.

[0011] In particular, using a scheme known, for example, from DE 20 2013 012 285 U1, it is impossible to achieve a uniform volumetric flow rate at the air outlet area of ​​the air outlet at different locations of the air outlet.

[0012] On the other hand, sometimes for design reasons, it is desirable to integrate the air vent's outlet opening as a slit-like opening harmoniously into the overall integrated dashboard design (Gesamt-I-Tafel-Design), so that the functional elements of the air vent, especially the thin sheet, cannot be directly seen from the vehicle's interior space.

[0013] However, reducing the outlet opening of the air outlet brings other problems. In particular, it has been shown that targeted deflection of airflow can no longer be achieved, or can only be partially achieved, in air outlets with slit-shaped outlet openings. This is especially true when the airflow deviates from the main flow direction by a certain deflection angle.

[0014] Therefore, especially in air outlets with slit-shaped outlet openings, the deflection area that the airflow escaping from the outlet opening can achieve is reduced to a relatively small deflection area.

[0015] Based on the above, the purpose of this invention is to improve an air outlet in a way that ensures optimal air deflection even in a relatively large deflection area, thereby improving the overall performance of the air outlet.

[0016] In particular, it is intended to provide an air outlet with a slit-shaped outlet opening that can achieve optimized quality of the volumetric flow rate discharged from the air outlet in terms of airflow orientation over the entire deflection region of the airflow escaping from the outlet opening.

[0017] The basic objective of the present invention is achieved by the vehicle air vent as described in independent claim 1, wherein advantageous improvements to the air vent according to the invention are given in the dependent claims.

[0018] Therefore, the present invention particularly relates to an air vent for a vehicle, wherein the air vent includes a housing having an air inlet region and an air outlet region, wherein an air passage is formed by the housing at least partially or partially.

[0019] The air outlet according to the invention also has at least one airflow control and / or airflow deflection element at least partially or partially housed in the housing, the at least one airflow control and / or airflow deflection element being mounted in a movable and particularly pivotable manner relative to the housing so as to deflect the airflow flowing through the air passage from the main flow direction as needed, at least at the air outlet of the air outlet.

[0020] The walls of the housing can extend in a straight line; however, it is advantageous for the wall areas of the housing to be implemented in an arc shape, especially in the air outlet area of ​​the housing at the air outlet.

[0021] To ensure optimized air deflection and continuous variation of air deflection, specifically across the entire deflection range of the air outlet, the present invention proposes that the air outlet include a device configured to eliminate or at least reduce or weaken coanda. The Coanda effect, particularly, occurs in the region of the inner wall of the housing and / or the wall region of the at least one airflow control and / or airflow deflection element and / or the wall region inside and / or outside the housing that guides the airflow when the airflow is deflected from the main flow direction.

[0022] Here, the present invention is based on the following understanding: the defect of conventional air outlets mentioned at the beginning regarding the reduction of the airflow deflection area is particularly attributed to the so-called "Coanda effect".

[0023] The Coanda effect refers to a series of related phenomena that indicate a gas jet tends to glide "along" a convex surface rather than separating from it and continuing to move in its original flow direction. In the case of air or gas flow, the Coanda effect occurs particularly in confined spaces, which is precisely what is observed, at least locally, within the air outlet.

[0024] If the surface defining the air passage, especially the housing of the air outlet and / or the surface defining the air passage of the at least one airflow control and / or airflow deflection element, retracts relative to the original flow direction (i.e., especially relative to the main flow direction), the airflow does not continue straight but follows the surface flow.

[0025] Such a surface retracting from the main flow direction occurs particularly when at least one airflow control and / or airflow deflection element pivots or deflects from a neutral position for the purpose of airflow deflection. Because a Coanda effect or subsequent Coanda flow subsequently forms at least in the area of ​​the surface retracting from the main flow direction and / or in the area downstream of the surface, only poor precision (controlled) airflow deflection quality can be achieved, or precision (controlled) airflow deflection quality cannot be achieved at all.

[0026] Typically, the Coanda effect only takes effect before reaching a specific deflection position; once the critical deflection angle is exceeded, the airflow abruptly separates from the Coanda wall. Therefore, the desired deflection area affected by the Coanda is not always / cannot be controlled almost continuously.

[0027] In order to achieve continuous air deflection throughout the entire deflection or control area, the present invention proposes to implement air deflection independent of the Coanda effect.

[0028] According to the present invention, this is achieved by means of a device for eliminating or reducing / weakening the Coanda effect. The device for eliminating or reducing / weakening the Coanda effect operates by removing the vacuum between the outflowing air jet and the Coanda wall to eliminate the Coanda effect.

[0029] In particular, in the implementation of the air outlet according to the invention, it is proposed that the device for eliminating or reducing / weakening the Coanda effect is effective in the region of the inner wall of the housing and / or the wall region of the at least one airflow control and / or airflow deflection element and / or the wall region of the airflow guide located inside and / or outside the housing, wherein the region is at least partially or partially retracted relative to the main airflow direction applicable in the region.

[0030] In particular, this area refers to the wall region with a convex design for the main airflow direction applicable in this area.

[0031] To realize a device for eliminating or reducing / weakening the Coanda effect, different solutions can be considered, which can be arbitrarily combined with each other.

[0032] Therefore, according to an embodiment of the air outlet of the present invention, the device for eliminating or reducing / weakening the Coanda effect is configured to form at least partially and / or partially in the region of the inner wall of the housing and / or the wall region of the at least one airflow control and / or airflow deflection element and / or the wall region of the airflow guide located inside and / or outside the housing when the airflow flows through the air outlet, especially when the airflow is deflected.

[0033] In other words, the device for eliminating or reducing / weakening the Coanda effect is specifically configured to intentionally induce boundary layer separation in the corresponding area of ​​the air outlet.

[0034] Boundary layer separation is a hydrodynamic effect that causes airflow to deviate from the contours of the object or surface around which the flow originates. Downstream of the separation point, a vortex region forms between the laminar mainstream and the object or wall contours; this vortex region is sometimes referred to as dead water or a wake.

[0035] Boundary layer separation is caused by increased pressure in the reverse rotation direction. This can be achieved, for example, by setting an edge or step that protrudes into the main flow direction when the corresponding wall area of ​​the air outlet is to cause boundary layer separation and thus loss of velocity.

[0036] In order to eliminate the Coanda effect, particularly in the airflow around the at least one airflow control and / or airflow deflection element which is mounted in a manner movable and particularly pivotable relative to the housing, it is preferable that the means for eliminating or reducing / weakening the Coanda effect is configured such that corresponding velocities and / or separation bubbles / separation vortices are formed only in the region of the inner wall of the housing and / or the wall region of the at least one airflow control and / or airflow deflection element and / or the wall region of the airflow guide located inside and / or outside the housing when the airflow flows through the outlet with deflection (and especially with minimal deflection).

[0037] In particular, the device for eliminating or reducing the Coanda effect should be configured to generate a runoff velocity and a separation bubble / separation vortex downstream of the separation zone when the airflow flows through the housing, especially with airflow deflection, such that the airflow will not re-attach to the area of ​​the inner wall of the housing and / or the wall area of ​​the at least one airflow control and / or airflow deflection element and / or the wall area of ​​the airflow guide located inside and / or outside the housing.

[0038] According to the implementation scheme of the air outlet of the present invention, in order to form a loss velocity and / or separation bubble / separation vortex in the region of the inner wall of the housing and / or the wall region of the at least one airflow control and / or airflow deflection element and / or the wall region located inside and / or outside the housing that guides the airflow, an edge is formed, especially the edge of the inwardly recessed region, wherein, in the absence of a device for eliminating or reducing / weakening the Coanda effect, the airflow may at least partially or locally impinge on the region, and / or, in the absence of a device for eliminating or reducing / weakening the Coanda effect, the airflow may at least partially or locally follow the contour of the region.

[0039] In other words, according to the present invention, boundary layer separation and thus loss of velocity are intentionally induced, resulting in a turbulent flow region downstream of the separation point, thereby preventing the airflow from following the contour of the wall region.

[0040] To some extent, this measure breaks through the conventional thinking of technicians, because the design and layout of air outlets usually pursue laminar airflow. However, by inducing boundary layer separation locally, the Coanda effect can be eliminated in an unexpected way, thereby making the deflection range of the airflow independent of the Coanda effect, and achieving constant, optimal, and continuously controllable airflow deflection, especially across the entire deflection range.

[0041] According to the improved embodiment mentioned last, in which the means for eliminating or reducing / weakening the Coanda effect is formed by the edge, especially the edge of the inwardly recessed region, it is proposed that the edge is formed in a region where the airflow velocity is increased at least locally due to the narrowing of the effective flow cross section.

[0042] This measure is based on the understanding that static pressure has a minimum in regions where the airflow velocity is increased at least locally due to the narrowing of the effective flow cross section, which simplifies boundary layer separation.

[0043] As an alternative or supplement to an implementation variant in which the means for eliminating or reducing / weakening the Coanda effect is implemented by the edge, especially the edge of the inwardly recessed region, it is conceivable that the means for eliminating or reducing / weakening the Coanda effect is at least partially implemented as an active means for influencing the boundary layer.

[0044] One possibility for such an active device for influencing the boundary layer is to introduce the boundary layer in the region of the inner wall of the housing and / or the wall region of the at least one airflow control and / or airflow deflection element and / or the wall region located inside and / or outside the housing that guides the airflow. Specifically, air is blown onto the boundary layer on at least one surface of the air outlet that defines the air passage.

[0045] According to an implementation scheme of an active device for influencing the boundary layer, the active device for influencing the boundary layer includes at least one intake / exhaust opening, preferably in the form of a slit, for introducing additional air, particularly as needed or continuously, into the region flowing through the inner wall of the housing and / or the wall region of at least one airflow control and / or airflow deflection element and / or the wall region located inside and / or outside the housing that guides the airflow.

[0046] It is particularly preferred that the active device for influencing the boundary layer is configured to introduce additional air into the airflow, in accordance with the Venturi principle, and especially as needed, via an intake / exhaust opening preferably in the form of a slit.

[0047] The air outlet according to the present invention can be designed as a single-slot or multi-slot air outlet.

[0048] In this regard, it is particularly conceivable that the air outlet includes an airflow separator that is at least partially housed in the air outlet housing, such that the air passage defined or restricted by the housing is at least partially or segmentally divided into a first air passage and a second air passage separate from the first air passage.

[0049] In order to divide the total airflow flowing through the air passage defined or restricted by the housing per unit time into a first airflow portion flowing through a first air passage and a second airflow portion flowing through a second air passage as needed, the air outlet includes, in particular, a valve-type airflow control element that is pivotable relative to the airflow separator from a neutral position. In the neutral position, the airflow control element is at least partially and / or partially and preferably completely aligned with the airflow separator in the main flow direction of the airflow flowing through the air outlet, thereby at least partially or partially blocking the gas supply to the first air passage or the second air passage.

[0050] In this design of the air outlet according to the invention as a single-slot or multi-slot air outlet, it is particularly conceivable that: at the air outlet region of the housing, two housing walls opposite each other are at least partially close to each other, wherein at least in the close wall region of the housing, at least one active device for influencing the boundary layer is provided, having at least one intake / exhaust opening preferably in the shape of a slit, the at least one active device for introducing additional air into the airflow flowing through the air passage, particularly as needed or continuously.

[0051] Alternatively or otherwise, it is conceivable that, viewed in the main flow direction, an edge region having an edge that is at least partially or partially recessed into the airflow is formed upstream of and particularly adjacent to the at least one intake / exhaust opening, which is preferably slit-shaped.

[0052] However, the present invention is not limited to single-slot or multi-slot air outlets. More precisely, it is also suggested that the device for eliminating or reducing / weakening the Coanda effect on the air outlet is implemented as a "cylindrical" air outlet, and in order to deflect air as needed in a first direction, especially in the vertical direction, the air outlet has at least two air guide shrouds that are at least partially opposite each other and capable of pivoting relative to the housing about a common axis of rotation perpendicular to the first direction, with an air passage formed between the at least two air guide shrouds.

[0053] The at least two air guide housings are mounted in a pivotable manner, particularly in common and preferably relative to each other. Preferably, the surface defining the air passage between the two air guide housings is designed to be convexly curved or angled, particularly in the direction of the air passage.

[0054] In this design variant, the Coanda effect in the wall region of the air guide housing should be eliminated. For example, it is conceivable to provide an inwardly recessed step in the wall region of at least one air guide housing.

[0055] In short, the present invention is based on the understanding that the Coanda effect is eliminated by removing the negative pressure between the outflowing air jet and the corresponding Coanda wall by setting up a device for eliminating or reducing / weakening the Coanda effect.

[0056] This is achieved, in particular, through the following two measures:

[0057] 1. Introduce a loss velocity edge as the initial location of the eddy wake; and / or

[0058] 2. Additional air is supplied to the starting region of the vortex wake by negative pressure intake (Venturi principle), thereby removing the negative pressure on the Coanda wall caused by the Coanda effect, which causes airflow to adhere to the Coanda wall.

[0059] These measures allow for the continuous deflection or control of airflow independent of the Coanda effect, enabling continuous air deflection independent of the Coanda effect across the entire deflection or adjustment range of the air outlet.

[0060] In the following description, embodiments are described in detail with reference to the accompanying drawings.

[0061] In the attached diagram:

[0062] Figure 1 : A schematic and cross-sectional view of an air outlet with air deflection implemented as a cylindrical air outlet according to the prior art, i.e. without corresponding devices for eliminating or reducing / weakening the Coanda effect;

[0063] Figure 2A first exemplary embodiment of the air outlet according to the present invention is shown schematically and in cross-sectional view, the air outlet and Figure 1 The air outlet shown is also implemented as a cylindrical air outlet, wherein the air guide cover of the air outlet is implemented with an inwardly recessed edge, which serves as the initial part of the vortex wake.

[0064] Figure 3 The air outlet, implemented as a dual-slot outlet, is shown schematically and in cross-section, without any corresponding device for eliminating or reducing / weakening the Coanda effect.

[0065] Figure 4 A second exemplary embodiment of the air outlet according to the invention is shown schematically and in cross-sectional view, the air outlet and Figure 3 The air outlet shown is also implemented as a double-slot air outlet and has an active device for influencing the boundary layer by blowing air into the boundary layer; and

[0066] Figure 5 The third exemplary embodiment of the air outlet according to the invention is illustrated schematically and in cross-sectional view. The air outlet is implemented as a single-slot air outlet and has active means for influencing the boundary layer by blowing air to the boundary layer to eliminate the Coanda effect.

[0067] exist Figure 1 and Figure 2 The air outlet 1, which is implemented as a cylindrical air outlet, is shown schematically and in cross-sectional view.

[0068] The air outlet 1, configured as a cylindrical air vent, has a housing 2 with an inlet opening at an air inlet region 3 and an outlet opening at an air outlet region 4, wherein the air outlet opening of the air outlet 1 is defined by an outlet wall 5 of the housing. An air passage 6 is defined between the inlet opening and the outlet opening for allowing airflow to pass through the housing 2 in the main flow direction H. The air outlet 1 is installed in a vehicle (such as a car or truck) and specifically directs fresh air into the vehicle interior.

[0069] In shell 2, Figure 1 and Figure 2 The cylindrical air outlet shown contains a total of three deflecting airflow elements 8. In the illustrated embodiment, the deflecting airflow elements 8 have a prismatic cross-sectional geometry, although other cross-sectional geometries are also conceivable.

[0070] In particular, the deflecting airflow element 8 should have a shape in which the air passage 6 between two adjacent deflecting airflow elements 8 preferably narrows in the middle region.

[0071] The deflecting airflow element 8 is used to deflect air in a first direction, such as the vertical direction, as needed, and is capable of pivoting relative to the housing 2 about a common axis of rotation perpendicular to the first direction, wherein air passages are formed between adjacent air deflecting elements. The deflecting airflow elements 8 together form what is called a "cylinder 9".

[0072] In particular, the deflecting airflow element 8 is arranged in the housing 2 to be adjustable between a first end position and a second end position. Here, the deflecting airflow element 8 can also occupy an intermediate position between the end positions if necessary.

[0073] The deflecting airflow elements 8 can be designed identically and arranged only as mirror images of each other, such as... Figure 1 and Figure 2 The situation inside the cylindrical air vent is shown.

[0074] In particular, the deflecting airflow elements 8 can move in the same way, and are also mirror images of each other.

[0075] The airflow guiding element 8 can be designed as a cup shape, which can be, for example, a cylindrical casing. However, other curved surface geometries are also conceivable, such as conical or parabolic surfaces. The curved surface geometry can be particularly determined by the opening geometry of the air outlet 1. Thus, for example, a conical surface can be used in a gradually narrowing opening gap. Generally, the deflecting airflow element 8 can have a continuously curved shape.

[0076] Here, the convex sidewalls of the deflecting airflow element 8 can face each other.

[0077] Because shrinkage occurs at the core of the injection mold, the deflecting airflow element 8 must be manufactured with a larger draft angle. This larger draft angle inside the cylinder 9, which is composed of the deflecting airflow element 8, aerodynamically causes the airflow to... Figure 1 The flow passes through the tapered cross-section that opens in the direction of flow, as indicated by the arrow in the diagram.

[0078] In particular, such as Figure 1 As shown, in the prior art known cylindrical air outlets, due to the implementation of the deflecting airflow element 8 of the cylinder 9, a more dispersed airflow is generated at the air outlet region 4 of the air outlet, which is undesirable.

[0079] To prevent the airflow escaping from vent 1 from dispersing, such as Figure 2 As shown, in at least one deflecting airflow element 8, a step 10 is introduced at the narrowest point of the flow channel inside the cylinder 9, thereby achieving localized velocity loss and forming a subsequent vortex wake. The area in the flow channel filled by the subsequent vortex wake 11 reduces the ventilation effect inside the cylinder 9. Due to the reduced ventilation effect, the airflow is more effectively affected in terms of deflection.

[0080] therefore, Figure 2 The solution shown provides an enhanced deflection effect in the cylinder 9, which has a diffusion effect. Here, the flow channel of cylinder 9 is partially closed due to the formation of vortex wakes.

[0081] In the following text, see references Figure 3 and Figure 4 The illustrations in the figure provide a detailed description of a second exemplary embodiment of the air outlet 1.

[0082] Here, the air outlet 1 is designed as a double-slot air outlet or a double-channel air outlet.

[0083] The air outlet 1 has a housing 2 that is at least generally straight, having an air inlet region 3 and an opposite air outlet region 4. In this regard, the term "at least generally straight" means that the opposite sidewalls of the housing 2 of the air outlet 1 extend at least generally parallel to each other.

[0084] It can also be seen that: according to Figure 3 Dual-channel air vents and according to Figure 4 Each of the dual-channel air outlets has an airflow separator 12 housed in the housing 2 of the air outlet 1, such that the air channel 6 defined or limited by the housing 2 is at least partially or segmentally divided into a first air channel 13 and a second air channel 14 separate from the first air channel.

[0085] To divide the total airflow passing through the air passage 6 defined or restricted by the housing 2 per unit time into a first airflow portion passing through the first air passage 13 and a second airflow portion passing through the second air passage 14 as needed, the air outlet 1 has an airflow control element 7, which can control the airflow relative to the airflow separator 12 from... Figure 3 and Figure 4 The neutral position shown is pivoted. In the neutral position, the airflow control element 7 is at least partially or partially, and preferably completely, aligned with the airflow separator 12 when viewed in the main flow direction H of the airflow flowing through the air outlet 1, thereby at least partially or partially blocking the gas supply to the first air passage 13 or the second air passage 14.

[0086] In the air outlet region 4, a nozzle orifice 16 is formed. Here, two opposing wall regions are designed to at least partially approach each other. These wall regions in Figure 3 A so-called Coanda wall is formed in the air outlet 1 shown, because flow adhesion on the nozzle orifice 16 caused by the Coanda effect can be observed there.

[0087] Regardless of the number of air vents, this flow adhesion can always be observed on the nozzle orifice 16.

[0088] Specifically, such as Figure 3As exemplarily shown, even when the airflow control element 7 is in the neutral position, the airflow is still deflected upward at the nozzle orifice 16 / Coanda wall due to the Coanda effect.

[0089] To avoid this situation, the airflow control element 7 is now moved downwards, for example, from the neutral position, so that the airflow separates from the nozzle orifice 16 / Coanda wall only after reaching a certain point. This separation occurs abruptly, thus making continuous airflow control from the neutral position to that control position impossible.

[0090] To avoid this problem, Figure 4 The outlet 1, shown schematically and in cross-sectional view, has an active device for influencing the boundary layer by blowing air into the boundary layer at the inner wall region of the housing 2.

[0091] Furthermore, an edge 17 is used, which is implemented as a stall edge and serves as the initial location of the vortex wake 11. At the stall edge, the airflow separates from the wall and continues to flow, as indicated by the arrow. Behind the stall edge, the vortex wake 11 begins to form.

[0092] By supplying / drawing additional air through an opening or slit 18 in the wall in the initial region of the vortex wake 11, directly behind the edge of the loss of velocity, the negative pressure on the Coanda wall previously caused by airflow adhering to the Coanda wall is eliminated due to the use of negative pressure intake. Therefore, the airflow can be continuously deflected or controlled independently of the Coanda.

[0093] Figure 5 A third exemplary embodiment of the air outlet 1 according to the invention is schematically shown in cross-section. The air outlet is implemented as a single-slot air outlet and has an active means for influencing the boundary layer by blowing air to the boundary layer to eliminate the Coanda effect.

[0094] The invention is not limited to the embodiments shown in the accompanying drawings, but is derived from an overview of all the features disclosed herein.

[0095] List of reference numerals

[0096] 1. Air outlet

[0097] 2. Shell

[0098] 3. Air Inlet Area

[0099] 4. Air Exit Area

[0100] 5. Shell outlet wall

[0101] 6. Air passage

[0102] 7. Airflow control elements

[0103] 8. Deflecting airflow element

[0104] 9 tubes

[0105] 10 steps

[0106] 11. Vortex wake / separation bubble / separation vortex

[0107] 12. Airflow Separator

[0108] 13 First Air Passage

[0109] 14 Second Air Channel

[0110] 16 Nozzle orifice

[0111] 17 Edge

[0112] 18. Openings / slits / intake / exhaust openings

[0113] H Main flow direction

Claims

1. An air vent (1) for a vehicle, wherein the air vent (1) comprises: - A housing (2) having an air inlet region (3) and an air outlet region (4), wherein the housing (2) at least partially or partially forms an air passage (6); and - At least one airflow control and / or airflow deflection element (7, 8), said at least one airflow control and / or airflow deflection element (7, 8) being at least partially or partially housed in the housing (2) and mounted in a movable and particularly pivotable manner relative to the housing (2) so as to deflect the airflow through the air passage (6) from the main flow direction (H) as needed, at least at the air outlet of the air outlet (1). Its features are, The air outlet (1) includes a device configured to eliminate or at least reduce or weaken the Coanda effect, which is particularly generated in the region of the inner wall of the housing (2) and / or the wall region of the at least one airflow control and / or airflow deflection element (7, 8) and / or the wall region inside and / or outside the housing (2) that guides the airflow when the airflow is deflected from the main flow direction (H).

2. The air outlet (1) according to claim 1, in, The region of the inner wall of the housing (2) and / or the wall region of the at least one airflow control and / or airflow deflection element (7, 8) and / or the wall region located inside and / or outside the housing (2) that guides the airflow are at least partially or partially retracted relative to the main flow direction (H) of the airflow prevailing in the wall region.

3. The air outlet (1) according to claim 1 or 2, in, The region of the inner wall of the housing (2) and / or the wall region of the at least one airflow control and / or airflow deflection element (7, 8) and / or the wall region located inside and / or outside the housing (2) that guides the airflow are configured to be convex at least partially or partially with respect to the main flow direction (H) of the airflow prevailing in the wall region.

4. The air outlet (1) according to any one of claims 1 to 3, in, The device for eliminating or reducing / weakening the Coanda effect is configured to form at least partially and / or partially, in the region of the inner wall of the housing (2) and / or the wall region of the at least one airflow control and / or airflow deflection element (7, 8) and / or the wall region located inside and / or outside the housing (2) that guides the airflow, when the airflow flows through the outlet (1) particularly with airflow deflection.

5. The air outlet (1) according to any one of claims 1 to 4, in, The device for eliminating or reducing / weakening the Coanda effect is configured to form at least partially and / or partially in the region of the inner wall of the housing (2) and / or in the wall region of the at least one airflow control and / or airflow deflection element (7, 8) and / or in the wall region located inside and / or outside the housing (2) that guides the airflow, only when the airflow flows through the outlet (1) with deflection.

6. The air outlet (1) according to claim 4 or 5, in, The device for eliminating or reducing the Coanda effect is configured to generate a loss velocity and a separation vortex (11) downstream of the separation region, particularly when the airflow flows through the housing (2) with deflection, such that downstream of the separation region the airflow does not again impact the area of ​​the inner wall of the housing (2) and / or the wall area of ​​the at least one airflow control and / or airflow deflection element (7, 8) and / or the wall area inside and / or outside the housing (2) that guides the airflow.

7. The air outlet (1) according to any one of claims 4 to 6, in, In order to form runoff and / or separation vortices (11) in the region of the inner wall of the housing (2) and / or the wall region of the at least one airflow control and / or airflow deflection element (7, 8) and / or the wall region located inside and / or outside the housing (2) that guides the airflow, edges (10, 17) are formed, particularly the edges of inwardly recessed regions or stall edges, wherein, in the absence of the means for eliminating or reducing / weakening the Coanda effect, the airflow may at least partially or locally impinge on the wall region, and / or, in the absence of the means for eliminating or reducing / weakening the Coanda effect, the airflow may at least partially or locally follow the contour of the wall region.

8. The air outlet (1) according to claim 7, in, The edges (10, 17) are formed in regions where the flow velocity of the airflow is increased, at least locally, due to the narrowing of the effective flow cross section.

9. The air outlet (1) according to any one of claims 1 to 8, in, The device for eliminating or reducing / weakening the Coanda effect is at least partially configured as an active device for influencing the boundary layer by blowing air onto the boundary layer in the region of the inner wall of the housing (2) and / or the wall region of the at least one airflow control and / or airflow deflection element (7, 8) and / or the wall region located inside and / or outside the housing (2) that guides the airflow, and in particular at least one surface of the outlet (1) that defines the air passage (6).

10. The air outlet (1) according to claim 9, in, The active device for influencing the boundary layer includes at least one intake and / or exhaust opening (18), preferably in the form of a slit, which is used to facilitate the intake of air caused by negative pressure, especially as needed or continuously, and thus introduce additional air into the region flowing through the inner wall of the housing (2) and / or the wall region of the at least one airflow control and / or airflow deflection element (7, 8) and / or the airflow located inside and / or outside the housing (2) that guides the airflow.

11. The air outlet (1) according to claim 9 or 10, in, The active device for influencing the boundary layer is configured to introduce additional air into the airflow, in accordance with the Venturi principle, and especially as needed, via the intake and / or exhaust openings (18) which are preferably slit-shaped.

12. The air outlet (1) according to any one of claims 1 to 11, in, The air outlet (1) includes: - An airflow separator (12) is at least partially housed within the housing (2), such that an air passage (6) defined or restricted by the housing (2) is at least partially or segmentally divided into a first air passage (13) and a second air passage (14) separate from the first air passage. In order to divide the total airflow flowing through the air passage (6) defined or restricted by the housing (2) per unit time into a first airflow portion flowing through the first air passage (13) and a second airflow portion flowing through the second air passage (14), the outlet (1) includes an airflow control element (7) in particular in the form of a valve, which is pivotable relative to the airflow separator (12) from a neutral position in which the airflow control element (7) is at least partially and / or partially and preferably completely aligned with the airflow separator (12) when viewed in the main flow direction (H) of the airflow flowing through the outlet (1), thereby at least partially or partially blocking the air supply to the first air passage or the second air passage (13, 14).

13. The air outlet (1) according to claim 12, in, At the air outlet region (4) of the housing (2), two housing walls opposite each other approach each other at least partially, and wherein at least one active device for influencing the boundary layer is provided at least in the approaching wall region of the housing (2), having at least one intake and / or exhaust opening (18) preferably in the shape of a slit, the at least one active device for introducing additional air into the airflow flowing through the air passage (6) particularly as needed or continuously.

14. The air outlet (1) according to claim 13, in, Viewed in the main flow direction (H), an edge region with an indentation (10, 17) is formed upstream of and particularly adjacent to the at least one intake and / or exhaust opening (18) that is preferably slit-shaped.

15. The air outlet (1) according to any one of claims 1 to 11, in, In order to deflect air as needed in a first direction, especially in the vertical direction, the air outlet (1) includes at least two air guide covers that are at least partially opposite each other and capable of pivoting relative to the housing (2) about a common axis of rotation perpendicular to the first direction. An air passage is formed between the at least two air guide covers, wherein the at least two air guide covers are capable of pivoting particularly commonly and preferably in unison with respect to each other, wherein the surface of each air guide cover that defines the air passage (6) between the at least two air guide covers is configured to be particularly convex or angled toward the direction of the air passage.

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