Ventilation valve for vehicles

Abstract

A ventilation valve for a vehicle, used for exhausting air from the interior of the vehicle, the ventilation valve comprising: a valve frame having at least one opening, and at least one valve flap, the valve flap being mounted on the valve frame and being adjustable between a closed position and an open position, wherein the at least one valve flap closes the at least one opening in the closed position and opens the at least one opening in the open position, wherein air escaping through the at least one opening flows along a main flow direction from an air inlet side to an air outlet side, wherein a wall defining the at least one opening is inclined into the air flow so that the opening is gradually narrowed along the main flow direction.

Description

[0001] This application is a divisional application of the invention patent application with application date of July 10, 2018, application number 201810750831.9, and invention name “Ventilation valve for vehicles”. Technical Field

[0002] The present invention relates to a ventilation valve for ventilating the interior of a vehicle, comprising: a valve frame having at least one through opening, and at least one valve flap, which is mounted on the valve frame and can be adjusted between a closed position and an open position, wherein the at least one valve flap closes the at least one through opening in the closed position and opens the at least one through opening in the open position, wherein air escaping through the at least one through opening flows along a main flow direction from an air inlet side to an air outlet side. Background Art

[0003] Such ventilation valves are used to discharge waste air from the interior of the vehicle in the case of positive pressure in the interior of the vehicle relative to the vehicle environment. Thus, for example, air supplied to the interior of the vehicle by a ventilation system can be discharged. Specifically, a sudden positive pressure in the interior of the vehicle (for example, a positive pressure caused by closing a door or by triggering an airbag) can also be compensated by discharging excess air from the interior of the vehicle to the outside through a ventilation valve. Here, the valve flap is arranged so that the valve flap is held in a closed position due to gravity. If the pressure in the interior of the vehicle does not exceed or only slightly exceeds the external pressure, the ventilation flap is against the valve frame and thus closes the valve. This is intended to prevent impurities such as vehicle exhaust and noise from entering the interior of the vehicle. The valve flap is a valve flap of a generally elastic structure, and is specifically composed of a rubber sheet or a PET film. By the positive pressure that occurs in the interior of the vehicle, the valve flap is deformed against gravity and thus opens the passage. Such ventilation valves are known, for example, from DE 10 2006 056 868A1 and EP 0 728 606 B1.

[0004] However, the operation of known ventilation valves is not always satisfactory. For example, when air is exhausted, valve flap vibration and associated noise occur. In addition, dead water areas that weaken the air flow are often generated on the outside of the valve. Summary of the invention

[0005] The invention is therefore based on the object of providing a ventilation valve for a vehicle which ensures a more efficient conduction of air.

[0006] The invention achieves this object by a ventilation valve according to claim 1 and a vehicle having such a ventilation valve according to claim 10. Advantageous developments are found in the dependent claims, the description and the drawings.

[0007] According to the invention, the ventilation valve explained at the outset is characterized by a wall which delimits at least one passage and which is inclined into the air flow so that the passage tapers in the main flow direction.

[0008] The wall is an inner part of the valve frame that surrounds at least one passage. The wall does not have to be completely tilted into the airflow here. The wall is tilted into the airflow at least in sections so that the passage is narrowed along the main flow direction. The narrowing passage means that the opening cross section of the passage is reduced along the main flow direction. The wall defining the passage can be specifically funnel-shaped. The wall can have a polygonal, especially quadrilateral cross-section, for example. For example, then two opposite wall parts can be tilted into the airflow so that the passage is narrowed along the main flow direction. The remaining two wall parts do not have to be tilted into the airflow here, but can specifically extend along the main flow direction. Through the narrowing passage, the air resistance to the airflow escaping from the ventilation valve is reduced, which can specifically help to increase the flow speed of the airflow. In addition, the inclined wall also prevents dead water areas in the airflow. In the prior art, such dead water areas that hinder the airflow appear at the sharp edges between the wall and the elements of the ventilation valve connected to the wall. If the airflow escaping from the ventilation valve flows over the sharp edge, a vortex area that increases the air resistance is formed, which has a negative impact on the ventilation efficiency. The eddy flow area is referred to here as the dead water area, regardless of the presence of air as the flow medium. The inventors have recognized that the dead water area can be avoided by the inclination of the wall that delimits the passage according to the invention. By inclining the wall into the air flow, sharp edges, in particular right angles, are avoided and eddy flow formation is thus suppressed. In addition, vibrations of the at least one valve flap are also suppressed, which also reduces the air resistance and thus ensures a more efficient conduction of the air. The valve flap is specifically designed to be elastically deformable, for example consisting of rubber, in particular NBR, ethylene propylene diene monomer (EPDM) or a thermoplastic elastomer (TPE).

[0009] According to one embodiment, the ventilation valve comprises a drainage channel, which is arranged in the valve frame at the air outlet side and extends between the outer side of the narrowing wall and the outer wall. The outer wall is here closer to the outer side than the narrowing wall relative to the at least one opening, in particular, the outer wall can extend along the main flow direction. The drainage channel is used to discharge splash water that reaches the ventilation valve installed in the vehicle from the outside. Known ventilation valves are usually arranged at the rear of the vehicle near the tire. This is firstly due to the fact that the air flow supplied by the ventilation system in front of the vehicle can flow through the entire vehicle until the rear. Secondly, the ventilation valve arranged in this way can be covered by the rear panel of the vehicle, which is visually preferred. However, due to the spatial proximity to the tires of the vehicle, splash water often accumulates on the outer side of the ventilation valve. Known ventilation valves do sometimes have drainage channels. However, these usually do not allow reliable drainage of accumulated water, in particular, with respect to the drainage channels of known ventilation valves, accumulated water often enters the interior of the vehicle through the opening. The inventor has recognized that with respect to known ventilation valves, accumulated water in the drainage channel enters the interior of the vehicle in this way due to capillary effects. The accumulated water rises upwards on the outside at the wall of the opening (which in the prior art extends in the main flow direction) and passes through the opening into the vehicle interior. This occurs to a particularly great extent in the prior art if no drainage channel is provided. The water then collects on a surface which extends between the wall and the outer wall and is approximately parallel to the support surface of the at least one valve flap. Due to the wall which is inclined into the air flow according to the invention, the capillary effect is suppressed, which advantageously prevents or at least reduces the entry of water into the vehicle interior.

[0010] According to another embodiment, the ventilation valve comprises at least one rib, which extends through at least one passage perpendicularly to the main flow direction in order to block the at least one valve flap when moving against the main flow direction, wherein the at least one rib is rounded at the downstream end edge and / or at the upstream end edge. According to this embodiment, one or more ribs are provided, which extend through the passage in particular transversely or longitudinally. In the installed state of the ventilation valve, in particular, the ribs can extend vertically or horizontally. In the closed position, at least one valve flap rests against the valve frame. In the case of a force acting on the valve flap against the main flow direction, the valve flap can also rest against the at least one rib. In particular, such a force can be generated due to a negative pressure acting in the vehicle interior. At least one rib is used here to block the elastically configured valve flap to prevent (excessive) deformation of the valve flap in the direction of the passage. At least one rib preferably extends from the upstream end edge to the downstream end edge through the at least one passage in the main flow direction. The rounding of one or more end edges can reduce vortices and avoid dead water areas in the air flow. The air flow through the ventilation valve is further improved by this. Preferably, the two end edges are rounded and the rib thus has a wing shape.

[0011] According to one embodiment, the wall delimiting at least one through opening has rounded edges. In particular with polygonal (e.g. quadrilateral) walls, an increase in air resistance may occur at the edge of the wall extending between the air inlet side and the air outlet side. This weakens the air flow. By rounding the edges, this is avoided, which improves the efficiency of the air flow.

[0012] According to another embodiment, an arrow-shaped assembly pin extending in the main flow direction is arranged at the valve frame for attaching at least one valve flap, wherein the at least one valve flap has a receiving opening corresponding to the assembly pin. The arrow-shaped assembly pin specifically comprises an arrow shaft on the frame side and an arrow at its free end. In order to attach at least one valve flap to the valve frame, the receiving opening of the valve flap is matched with the assembly pin, and the valve flap is pressed onto the valve frame, wherein the assembly pin passes through their respective corresponding receiving openings in the valve flap. In particular, if the ventilation valve has a plurality of openings, each of which is closed by the valve flap, since the assembly pin extends in the main flow direction, the space required for fastening the valve flap can be reduced and the opening can therefore be increased. This leads to an increase in air flow. In addition, since at least one valve flap only has to be pressed against the frame so that the arrow of the assembly pin passes through the corresponding receiving opening, the assembly of the at least one valve flap is also simplified by the arrow-shaped design of the assembly pin. Finally, the arrow-shaped assembly pin also simplifies the opening of the valve flap by the air flow and thus increases the air flow. This is achieved by appropriately selecting the length of the arrow shaft extending in the main flow direction. The greater the ratio of the length of the arrow shaft to the thickness of the valve flap, the greater the movement clearance available for the valve flap along the main flow direction. Due to the movement clearance, at least one valve flap can be adjusted to the open position more easily. The movement clearance and thus the force to be applied to open the valve flap can be set arbitrarily by the ratio of the length of the arrow shaft holding the valve flap at the valve frame to the thickness of the valve flap. However, it should be ensured here that the valve flap still provides a reliable seal relative to the valve frame in the closed position. In addition, the at least one valve flap can also have a movement clearance along a direction perpendicular to the main flow direction, which can be used specifically to compensate for manufacturing tolerances. In the installed state of the ventilation valve, the movement clearance can be specifically set in the horizontal direction. The movement clearance can be set by the ratio of the width of the accommodating opening of the valve flap to the width of the arrow shaft.

[0013] According to one embodiment, the ventilation valve further comprises at least one centering pin, which is arranged at the valve frame and extends along the main flow direction, so as to center at least one valve flap during attachment to the valve frame, wherein the at least one valve flap has at least one receiving opening corresponding to the centering pin. Specifically, corresponding to the above-mentioned assembly pin, the centering pin can also be configured in an arrow shape. Along a direction perpendicular to the main flow direction, the centering pin of the valve flap can specifically produce a smaller clearance than the assembly pin here, wherein the ratio of the width of the arrow shaft of the centering pin to the width of the corresponding receiving opening is smaller than the ratio of the width of the arrow shaft of the above-mentioned assembly pin to the width of the corresponding receiving opening. The centering pin therefore helps to attach at least one valve flap to the valve frame, but requires higher manufacturing precision than the assembly pin. In contrast, the assembly pin allows for larger manufacturing tolerances.

[0014] According to another embodiment, the ventilation valve comprises a channel which, in the installed state of the ventilation valve, extends horizontally above the assembly pin. The channel forms a gap in order to accommodate the end of at least one valve flap mounted at the assembly pin during the movement of the valve flap from the closed position into the open position. During the opening movement of the valve flap, the valve flap is tilted about the axis formed by the assembly pin, wherein the end mounted at the assembly pin moves through the channel. As a result, this end of the valve flap does not come into contact with the air flow in a disturbing manner. In addition, the channel can be used as a drainage channel in order to drain water that reaches the ventilation valve from the outside, for example, splash water that is swept up by the tires of a vehicle. Since the assembly pin extends in the main flow direction, sufficient space is provided for such a channel without significantly reducing the cross-sectional area of ​​at least one opening.

[0015] According to another embodiment, at least one valve flap has rounded corners. The at least one valve flap is specifically designed to correspond to the at least one opening. For example, the at least one valve flap can have a polygonal, in particular quadrilateral design, corresponding to the walls delimiting the opening. In particular, as described above, the walls delimiting the at least one opening can have rounded edges. The corners of the valve flap can then be rounded accordingly. Preferably, the corners formed at the free end of the valve flap that is not connected to the valve frame are rounded. By the rounded corners of the valve flap, sharp edges in the airflow are avoided and the air flow is thus made more efficient, in particular oscillation of the valve flap is prevented.

[0016] The invention also achieves the object by a vehicle having a ventilation valve according to any of the preceding embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Exemplary embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0018] Figure 1 A perspective view of the ventilation valve according to the invention and a disassembled valve flap is shown,

[0019] Figure 2 Show Figure 1 A front view of the vent valve and the valve disc fixed to the valve frame and in the closed position,

[0020] Figure 3 Show Figure 1 Side view of the ventilation valve in

[0021] Figure 4 Show Figure 2 The ventilation valve in the figure does not show the valve disc,

[0022] Figure 5 Shown in perspective Figure 4 The ventilation valve in

[0023] Figure 6 Show Figure 1 Rear view of the ventilation valve in

[0024] Figure 7 The oblique view shows Figure 6 The ventilation valve,

[0025] Figure 8 Shown along Figure 5 The intersection line AA shown is a cross-sectional view through the ventilation valve,

[0026] Fig. 9 Show Figure 8 Details,

[0027] Fig.10 Shown along Figure 4 The cross-sectional view of the ventilation valve with the intersection line marked with BB,

[0028] Fig.11 Show Fig.10 , with the disc in the open and closed positions,

[0029] Fig.12 Shown along Figure 2 The cross-sectional view of the ventilation valve with the intersection line marked with CC,

[0030] Fig.13 Show Figure 4 Detail view of

[0031] Fig.14 A front view showing the valve disc,

[0032] Fig.15 A further perspective front view showing the vent valve, and

[0033] Fig.16 Shown along Fig.15 Cross-sectional view of the ventilation valve with the intersection line marked DD in the figure.

[0034] Unless otherwise indicated, like reference numerals refer to like items. DETAILED DESCRIPTION

[0035] Figure 1 An embodiment of a ventilation valve according to the invention is shown in a perspective view. The ventilation valve 10 comprises a valve frame 12 in which three passages 14 are formed. The passages 14 are each delimited by a wall 16 of the valve frame 12 and are spaced apart from one another by connecting plates 18, specifically as follows: Figure 4 and 5 . The wall 16 is also formed here by the connecting plate 18. A plurality of ribs 15 each extend through the passage 14. In the closed position of the ventilation valve 10, the passage 14 is covered by a valve flap 20, wherein the valve flap 20 rests against the wall 16 on the support surface 26. In the present exemplary embodiment, the valve flap 20 comes into contact with the ribs 15 only when a negative pressure prevails in the interior of the vehicle. For this purpose, the ribs 15 are slightly retracted in their respective passages 14 against the main flow direction H. The valve flap 20 is of elastic design, for example, it is composed of rubber, in particular NBR, EPDM or TPE, and is held in its closed position by gravity when the ventilation valve is in the installed state in the vehicle. For this purpose, the passage 14 is inclined relative to the vertical direction, i.e. relative to the Z direction, specifically as shown in FIG. Figure 1 As shown in . Therefore, the valve flap 20 can be reliably maintained in the closed position due to gravity.

[0036] If air escapes from the ventilation valve 10, for example due to a positive pressure prevailing in the vehicle interior, an air flow is generated which flows from the air inlet side 13.1 of the valve frame 12 to the air outlet side 13.2 and flows along the Y axis essentially in the main flow direction H. Due to this air flow, the deformable flap 20 is lifted from the valve frame 12 and bent outwards. As a result, the air flow can escape from the ventilation valve 10. Depending on the opening angle of the flap 20, the flap can deflect the air flow from the main flow direction.

[0037] According to the invention, a wall 16 is provided here which delimits the passage 14 and which is inclined at least in sections into the gas flow, so that the passage 14 tapers in the main flow direction H. This is particularly true in Figures 4 to 7 Visible in. Figure 4 and Figure 5 The ventilation valve is shown from the front (ie viewed against the main flow direction), while Figure 6 and Figure 7The ventilation valve is shown from the rear, i.e. viewed in the main flow direction. Each opening 14 is delimited by a surrounding wall 16, wherein the wall 16 is formed by the part of the valve frame 12 surrounding the respective opening 14 and the connecting plate 18. The walls 16 are not all completely inclined into the air flow here, but only their wall parts indicated by the reference numeral 16a are inclined into the air flow. The wall 16 of the upper opening 14 and the wall 16 of the middle opening 14 are each inclined into the air flow only along a wall part 16a extending essentially vertically. The wall 16 of the lowest opening 14 is not inclined into the air flow. Instead, the lower opening 14 has a trough 52 to collect and drain water that reaches the ventilation valve (see Figure 7 ).exist Figure 6 and 7 As can be seen in the drawing, the opening 14 tapers along the main flow direction H (in this case pointing into the plane of the drawing). This increases the flow velocity and ensures a more efficient conduction of the air. In addition, dead water areas in the air flow are avoided, as described above. The inclined wall 16a also has a rounded edge 40. This avoids sharp edges in the air flow and thus further reduces the air resistance. In addition, the swinging of the valve flap 20 is reduced, i.e. the high-frequency forward and backward movements of the valve flap in the air flow are reduced. The rounded corners 21 of the valve flap 20 also contribute to this.

[0038] Figure 8 Shown along Figure 5 The intersection line AA is shown as a detail of the ventilation valve 10 in a sectional view through the central opening 14. One of the inclined wall sections 16a can be seen here. This leads to a deflection of the air flow L occurring therein, as indicated by the arrows. In addition, Figure 8 The drainage channel 22 extending between the outer side of the tapering wall 16a and the outer wall 24 can be seen. Here, the outer wall 24 extends in the main flow direction, but can also be inclined relative to the main flow direction. The drainage channel 22 is used to collect and discharge splashing water that reaches the outside of the ventilation valve 10. Due to the inclined wall 16a, the drainage channel 22 is particularly wide and expanded along the main flow direction H. In the closed position, the valve flap 20 covering the opening 14 rests on the support surface 26 in a manner not shown. By means of the inclined wall portion 16a according to the invention, the capillary effect is suppressed in the above-mentioned manner and drainage is improved. Specifically, due to the reduction of sharp edges, the dead water area in the air flow is reduced. This reduces the air resistance.

[0039] In addition, Figure 8 In and especially in Fig. 9 Also shown in FIG. 1 is one of the ribs 15. As can be seen here, the rib 15 has rounded end edges 15a, 15b. This wing-shaped structure of the rib 15 avoids eddies and in particular flow interruptions in the airflow and thus reduces the flow resistance.

[0040] Fig.10 Shown along Figure 4 The intersection line BB is shown in a cross-sectional view through the central opening 14. The air flow L through the ventilation valve is indicated by the arrow line. It can be seen in particular that in order to reduce the flow resistance, the connecting plate 18 is also rounded at its upstream end 19. In addition, Fig.10 , the arrow-shaped mounting pin 30 or centering pin 32 pointing in the main flow direction and the passage 50 located behind it can be seen. The mounting pin 30 serves to attach the valve flap 20 to the valve frame 12. During the attachment of the valve flap 20 to the mounting pin 30 of the valve frame 12, the centering pin 32 serves to center the valve flap 20, as explained in further detail below. The passage 50 located behind it serves firstly to accommodate the end 23 of the respective valve flap 20, which is mounted on the mounting pin 30, as explained in further detail below. Fig.11 . The valve flap 20 can be seen here in the open position "open" and in the closed position "closed". During the opening movement of the valve flap 20 from the closed position to the open position, the valve flap 20 moves about an axis which extends along the assembly pin 30 in the X direction (into the plane of the drawing), wherein the upper end 23 of the valve flap 20 moves in the channel 50. The centering pin 32 is also located on the axis. In addition, the channel 50 serves as a drainage channel.

[0041] exist Figure 12 to Figure 14 In the figure, the assembly pin 30 can be seen in detail. Fig.13 As can be seen in the figure, the wall 16 of each through-hole 14 has four assembly pins 30 and a centering pin 32, wherein, of course, more or fewer assembly pins and centering pins can also be provided. Fig.14 As can be seen in the figure, the valve flap 20 has a correspondingly designed receiving opening 34. To attach the valve flap 20, the receiving opening 34 is made to coincide with the mounting pin 30 and the centering pin 32 and the valve flap 20 is pressed against the valve frame 12 so that the arrow-shaped pins 30, 32 pass through the corresponding receiving opening 34. The receiving opening 34 here first passes through the relatively wide arrow 36 of the mounting pin 30 or the centering pin 32. After passing through the arrow 36, the valve flap 20 is mounted with its receiving opening 34 at the arrow shaft 38 of the mounting pin 30 and the centering pin 32. Fig.12 Shown along Figure 2 The intersection line marked with CC in the figure passes through the vent valve. Fig.12Reference numeral 42 in the figure indicates how much movement play the mounted valve flap 20 has left in the Y direction, i.e. in the main flow direction. The greater this movement play, the easier the valve flap 20 can be opened. Reference numeral 44 indicates how much movement play the valve flap 20 has left in the X direction. The movement play 44 in the X direction is here produced by the ratio of the width of the arrow 38 to the width of the receiving opening 34 of the valve flap 20, wherein the width represents the extension in the X direction. The corresponding movement play 46 produced by the centering pin 32 is smaller here. The centering pin 32 can therefore be used as a centering element during the attachment of the valve flap 20 to the valve frame 12. As mentioned above, the assembly pins 36 arranged on both sides of the centering pin 32 have a higher tolerance due to their greater movement play 42. In addition, the upper end of the rib 15 can be seen.

[0042] Fig.15 The ventilation valve 10 is shown in another perspective front view. Fig.16 Shown along Fig.14 2 through the ventilation valve. Here, one of the mounting pins 30 can be seen. Specifically, the transition between the drainage channel 22 and the channel 50 can be seen, which also serves as a drainage channel. Water accumulated in the channel 50 can therefore enter the corresponding drainage channel 22 at the end of the connecting plate 18 and can be discharged downwards.

[0043] List of Reference Numerals

[0044] 10 Ventilation valve

[0045] 12 Valve frame

[0046] 13.1 Air inlet side

[0047] 13.2 Air outlet side

[0048] 14 Port

[0049] 15 ribs

[0050] 15a Upstream end edge

[0051] 15b Downstream end edge

[0052] 16 walls

[0053] 16a Inclined wall portion of wall

[0054] 18 Connecting plate

[0055] 19 Upstream end of connecting plate

[0056] 20 Valve disc

[0057] 21 Rounded corners of the disc

[0058] 22 Drainage channel

[0059] 23 Upper end of the valve disc

[0060] 24 outer wall

[0061] 26 Support surface

[0062] 30 Assembly pin

[0063] 32 Centering pin

[0064] 34 Receiving port

[0065] 36 Arrow

[0066] 38 Arrow shaft

[0067] 40 Rounded edges

[0068] 42 Movement clearance along the Y direction

[0069] 44 Movement clearance along the X direction

[0070] 46 Clearance of the centering pin along the X direction

[0071] 50 channels

[0072] 52 sink

[0073] H Main flow direction

[0074] L Airflow

Claims

1. A ventilation valve (10) for a vehicle, for exhausting air from the interior of the vehicle, the ventilation valve comprising: a valve frame (12) having at least one opening (14), and at least one valve flap (20), which is mounted on the valve frame (12) and is adjustable between a closed position and an open position, wherein the at least one valve flap (20) closes the at least one opening (14) in the closed position and opens the at least one opening (14) in the open position, wherein the ventilation valve (10) is configured such that air escaping through the at least one opening (14) flows along a main flow direction (H) from an air inlet side (13.1) to an air outlet side (13.2), wherein the valve frame comprises a wall delimiting the at least one opening (14), the wall comprising a substantially vertically extending wall portion (16a), the wall portion (16a) being inclined into the air flow so that the at least one opening (14) tapers along the main flow direction (H), The ventilation valve (10) further comprises a drainage channel (22), which is arranged at the air outlet side (13.2) of the valve frame (12) and extends between the outer side of the inclined wall portion (16a) and the outer wall (24).

2. The ventilation valve (10) according to claim 1, comprising at least one rib (15), which extends perpendicularly to the main flow direction (H) through the at least one passage (14) in order to block the at least one valve flap (20) when moving against the main flow direction (H), wherein The at least one rib (15) is rounded at a downstream end edge (15b) and / or at an upstream end edge (15a).

3. The ventilation valve (10) according to claim 1, wherein the wall portion (16a) delimiting the at least one passage opening (14) has rounded edges (40).

4. The ventilation valve (10) according to claim 1 comprises an arrow-shaped assembly pin (30), which is arranged at the valve frame (12) and extends along the main flow direction (H) to facilitate the attachment of the at least one valve flap (20), wherein the at least one valve flap (20) has a receiving opening (34) corresponding to the assembly pin (30).

5. The ventilation valve (10) according to claim 4 comprises at least one centering pin (32), which is arranged on the valve frame (12) and extends along the main flow direction (H) so as to center the at least one valve flap (20) when attached to the valve frame (12), wherein the at least one valve flap (20) has at least one receiving opening (34) corresponding to the at least one centering pin (32). 6 . The ventilation valve ( 10 ) according to claim 4 , comprising a channel ( 50 ) which, in the installed state of the ventilation valve ( 10 ), extends horizontally above the assembly pin ( 30 ).

7. The ventilation valve (10) according to claim 1, wherein the at least one valve flap (20) has rounded corners (21).

8. A vehicle having a ventilation valve (10) according to one of the preceding claims.

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