Passenger compartment ventilation

Abstract

Passenger compartment ventilation for ventilating the interior of a motor vehicle, comprising an outlet opening (1) of the passenger compartment ventilation and a connecting channel (2) for discharging air in an air outlet direction (A), which connects the interior to the outlet opening (1), wherein a baffle (3) is arranged on the outside of the outlet opening (1) so that the ingress of water into the connecting channel (2) through the outlet opening (1) from an untolerated angular range is reduced and therefore limited to a tolerated angular range, wherein a water guide screw (5) with a cross-section at least approximately U-shaped is formed on a first wall (4) of the connecting channel (2) in an area onto which water entering through the outlet opening (1) in the tolerated angular range impinges, wherein the curvature of the cross-section of the water guide screw (5) increases at least section by section in the water inlet direction (E), characterized in thatthat the water guide screw (5) forms a planar component with at least a U-shaped front face exhibiting at least a section-by-section increasing curvature, so that water collected inside the water guide screw (5) can drain away along the planar extension of the water guide screw (5) in a direction normal to the front face, preferably vertically downwards.

Description

Field of the invention

[0001] The present invention relates to a passenger compartment ventilation system for ventilating the interior of a motor vehicle. State of the art

[0002] It is known to provide ventilation openings, in particular ventilation slots, in motor vehicles to permanently allow air to escape from the interior of the motor vehicle into the surroundings of the vehicle, for example, air introduced by an interior air conditioning system. Such ventilation openings can be formed, as is known, in particular in the area of ​​a rear pillar or in the area of ​​the rear of a motor vehicle.

[0003] It is essential for the function of such ventilation systems in motor vehicles that the entry of water into the vehicle via the ventilation openings is prevented as far as possible in order to avoid damage caused by unwanted water ingress, for example by splash water or cleaning water in a car wash.

[0004] Alternatively or in addition to preventing unwanted water ingress, attempts are made to quickly drain away any water that enters.

[0005] A ventilation device for the interior of a vehicle with a ventilation opening is known, for example, from DE 43 22 213 C1.

[0006] Particularly when installing ventilation openings in a less protected position on the surface of the vehicle, it is important to effectively prevent the ingress of water, including, for example, from a high-pressure jet, while limiting the cross-section required to ventilate the interior as little as possible.

[0007] DE 21 64 857 A discloses a driver's cab for commercial vehicles with a relatively flat roof, which has drainage surfaces sloping towards the side walls, wherein openings for ventilating the driver's cab are provided in the drainage surfaces.

[0008] From DE 1 430 896 A a motor vehicle is known with a joint located in the area of ​​the rear window and running transversely to the longitudinal axis of the vehicle, which is used on the one hand by a strip of the upper rear panel of the vehicle which also serves as a bearing holder for the rear window frame and on the other hand by the edges of the hood panel of an engine or luggage compartment which adjoins it approximately horizontally and which at the same time forms a splash water collecting and drainage channel running below the joint, wherein the joint is connected to the vehicle interior by a labyrinth gap running below the vehicle body panel on the rear window.

[0009] FR 2 691 679 A1 discloses an air extraction device for motor vehicles, the passenger compartment being in communication with the luggage compartment and in which an air outlet opening is concealed by the rear bumper mounted behind a structural support, a wall of the structural support carrying one of the air extraction elements of the exhaust system, vertically distributed on two levels near a cavity delimited by the support and the wall of the bumper. Summary of the invention

[0010] It is an object of the invention to improve passenger compartment ventilation systems for ventilating the interior of a motor vehicle of the type mentioned in this respect and, in particular, to provide a passenger compartment ventilation system which largely prevents undesired water ingress and at the same time enables efficient ventilation.

[0011] The problem is solved by a passenger compartment ventilation for ventilating the interior of a motor vehicle with the features according to claim 1.

[0012] The passenger compartment ventilation comprises an outlet opening of the passenger compartment ventilation and a connecting duct for discharging air in an air outlet direction, which connects the interior to the outlet opening, wherein a baffle is arranged on the outside of the outlet opening, so that the entry of water into the connecting duct through the outlet opening from an untolerated angular range is reduced and is therefore limited to a tolerated angular range, wherein on a first wall of the connecting duct, in a region onto which water entering through the outlet opening in the tolerated angular range strikes, a water guide screw which is at least approximately U-shaped in cross section is formed.

[0013] According to the invention, the shape of a passenger compartment ventilation system is specially designed within a ventilation outlet opening, i.e., the "housing" of the passenger compartment ventilation system. A baffle, in particular a correspondingly inclined baffle, ensures that only a reduced amount of water enters the housing of the passenger compartment ventilation system and thus into the connecting channel that connects the outlet opening on the surface of the vehicle with the interior of the vehicle. In addition, the direction of the incoming water is focused on a desired water entry direction, so that a jet of water or water droplets that does enter can be handled more precisely. The "tolerated angle range" describes a range of angles between the path of the incoming water and the plane of the outlet opening.The center of gravity or midpoint of the tolerated angular range therefore essentially corresponds to the water inlet direction and also the opposite direction to the air outlet direction.

[0014] According to the invention, the curvature of the cross-section of the water guide screw increases, at least in sections, in the direction of water inlet. The water guide screw preferably forms a spiral, at least in sections. In particular, an end region of the water guide screw can have a smaller curvature or no curvature at all, and in particular form a water drainage edge.

[0015] According to the invention, the water guide screw is a flat component with at least a U-shaped end face, so that water collected inside the water guide screw can flow along the flat extension of the water guide screw, i.e., essentially in a direction normal to the end face. According to the invention, the end face of the flat component has a curvature that increases at least in some sections.

[0016] According to the invention, the water entering the system in the direction of the water inlet is redirected in the direction of the inlet by a "snail," the water guide screw. For this purpose, the water guide screw has at least a U-shape to redirect the incoming water.

[0017] By means of the at least U-shaped water guide screw, depending on the direction and momentum of the impinging water and the specific shape of the water guide screw, it can be achieved that the water entering in a water inlet direction is essentially deflected in its opposite direction, i.e. in the air outlet direction, and / or that the water entering in the water inlet direction is swirled in the area of ​​a greater curvature of the water guide screw or the incoming water jet is essentially broken and caught, so that the water entering the water guide screw, in particular a high-pressure water jet, essentially does not reach beyond the end area of ​​the water guide screw into the area of ​​the escaping air and thus does not mix with the air path, but runs off via the water guide screw.

[0018] The inventive design and arrangement of the water guide screw adequately breaks up water ingress or a high-pressure water jet, even in an exposed passenger compartment ventilation system. The cross-section required to ventilate the interior is minimally restricted and, due to only minimal turbulence, only slightly reduced. The pressure loss of the escaping air flowing in the direction of the air outlet is kept to a minimum, and water ingress is prevented by decoupling the air-water path.

[0019] The passenger compartment ventilation is preferably installed in the immediate exterior area so that ventilation occurs through the outlet opening into the exterior of the vehicle.

[0020] The passenger compartment ventilation, in particular the outlet opening, is preferably arranged at the rear of the motor vehicle, in particular on a rear pillar of the motor vehicle.

[0021] With a more pronounced curvature of the end section of the water guide screw, the water or incoming water jet, in particular a high-pressure water jet, entering in the direction of water inlet is not merely deflected by the screw, but is broken up and swirled in the end section of the water guide screw in such a way that there is essentially no longer any mixing of the air escaping from the interior of the vehicle and the water trapped by the water guide screw. The water trapped in the end section of the water guide screw over the flat extension of the water guide screw can flow downwards via a preferably vertically arranged water guide screw. The water is preferably collected at the bottom of the screw and preferably drained outwards via an inclined base.

[0022] The water guide screw preferably has a vessel-like bottom structure in order to collect the water trapped in the water guide screw and run off.

[0023] Alternatively or additionally, the water guide screw preferably has an inclined bottom in order to drain the water collected in the water guide screw to the outside.

[0024] The water guide screw preferably protrudes from the first wall toward a second wall of the connecting channel, i.e., it is aligned from one wall of the connecting channel to the opposite wall of the connecting channel and is thus located inside the connecting channel. There is a sufficiently large distance between the end of the water guide screw and the second wall of the connecting channel to allow effective air discharge; for example, approximately half the cross-section of the connecting channel remains free despite the formation of the water guide screw.

[0025] Preferably, at least one sealing flap opening in the air outlet direction is arranged in the connecting channel, upstream of the water guide screw in the air outlet direction. This allows air to escape through the connecting channel, but prevents air, water mist, emissions, dust, or noise from entering the interior of the motor vehicle. Particularly preferably, several—at least two—sealing flaps can be arranged one above the other or next to each other, i.e., parallel, in the connecting channel.

[0026] The baffle is preferably attached on one side, in the area of ​​the first wall, and preferably has an outward slope toward the other side, so that the baffle complements the shape of the water guide screw. The orientation of the baffle thus, in a sense, already forms part of the water guide screw. The baffle can already have a curve on the same side as the water guide screw or can also be designed as a flat component.

[0027] The water guide screw can be composed of several, i.e. at least two, components.

[0028] The water guide screw can be formed, particularly in sections, through the first wall. Conversely, the water guide screw can thus form a section of the wall of the connecting channel.

[0029] The rear vent can be arranged, in particular, directly on the body, i.e., on the surface of the motor vehicle. The outlet opening can be formed in a body component. The passenger compartment vent can be arranged, in particular, above a rear bumper. The passenger compartment vent, in particular its outlet opening, can be arranged vertically in a rear pillar. Brief description of the drawings

[0030] The invention is described below by way of example with reference to the drawings. Fig. 1a is a sectional view of a passenger compartment ventilation system according to the invention. Fig. 1b is a sectional view of a passenger compartment ventilation according to the invention according to Fig. 1 with an alternative waterway. Fig. 2 is a sectional view of another passenger compartment ventilation according to the invention. Fig. 3 is a sectional view of another passenger compartment ventilation according to the invention. Detailed description of the invention

[0031] In Fig. 1a and Fig. 1b shows a passenger compartment ventilation system according to the invention, wherein the direction of air escaping from the interior of a motor vehicle, i.e. the air outlet direction A, is shown with white arrows on the inside and the direction of water entering the connecting duct 2 of the passenger compartment ventilation system, i.e. the water inlet direction E, is shown with thick black arrows.

[0032] The passenger compartment ventilation system, for ventilating the interior of the motor vehicle, preferably at the rear of the motor vehicle, comprises a passenger compartment ventilation outlet opening 1, which is connected to the interior of the motor vehicle via a connecting duct 2. The connecting duct 2 serves to discharge air in the air outlet direction A.

[0033] In the connecting channel 2, in the air outlet direction A in front of the water guide screw 5, a sealing flap 7 opening in the air outlet direction A is arranged, which in Fig. 1a and Fig. 1b is shown open.

[0034] On the outside of the outlet opening 1, an inclined baffle 3 is arranged, by means of which the entry of water into the connecting channel 2 through the outlet opening 1 from an untolerated angular range is reduced and is therefore limited to a tolerated angular range, namely essentially to the water entry direction E. The baffle 3 is fastened on one side, in the region of a first wall 4, and has an inclination towards the other side, outwards, so that the baffle 3 continues or supplements the shape of the water guide screw 5.

[0035] On the first wall 4 of the connecting channel, i.e. on a boundary wall of the connecting channel 2, in an area onto which water entering through the outlet opening 1 in the water inlet direction impinges, a water guide screw 5 is formed which is at least approximately U-shaped in cross section and is designed such that the water entering in the water inlet direction E is deflected substantially in its opposite direction, i.e. in the air outlet direction A.

[0036] The figures each depict a sectional view through the planar extension of the passenger compartment ventilation, in particular the water guide screw, with the section perpendicular to the planar extension. Thus, the sections each show the cross-section or the end face of the passenger compartment ventilation or the water guide screw, the outlet opening, etc. The section preferably corresponds to a horizontal section in the installed position in a vehicle. Trapped water can thus flow downward along the planar extension of the water guide screw in the installed position in a vehicle.

[0037] The water guide screw 5 initially has an approximately circular arc shape, then the curvature of the cross-section of the water guide screw 5 increases, at least in sections, in the water inlet direction E. At the end, the water guide screw merges into a flat outlet. Overall, the cross-section or the front side of the water guide screw has a roughly snail or spiral shape.

[0038] Depending on its energy and the specific shape of the water guide screw, the incoming water can essentially follow a path as in Fig. 1a and / or as in Fig. Take the example shown in Figure 1b.

[0039] As in Fig. 1a, the kinetic energy of the incoming water can be redirected by the water guide screw in its opposite direction, i.e. by approximately 180 degrees, as shown by the black arrows in Fig. 1. The water can then at least partially escape from the passenger compartment ventilation through the outlet opening.

[0040] Particularly preferably, the water guide screw 5 is designed so that at least a large part of the incoming water follows a path as in Fig. 1 b. For this purpose, the water guide screw 5 preferably has a correspondingly strong curvature and particularly preferably a less strongly curved outlet area at the end of the water guide screw 5.

[0041] The kinetic energy of the incoming water is dissipated by the water guide screw and falls downwards due to gravity or flows downwards along the flat extension of the water guide screw 5, where it can be collected and drained in a controlled manner by a vessel-like structure at the bottom of the water guide screw 5, preferably flowing outward through an inclined bottom. This essentially separates the air escaping from the interior and a water jet, particularly a high-pressure water jet, entering through the outlet opening 1, so that no more water mist enters the interior of the motor vehicle.

[0042] The water guide screw 5 protrudes from the first wall 4 in the direction of the opposite second wall 6 of the connecting channel 2, wherein there is a sufficiently large distance between the end of the water guide screw 5 and the second wall 6 for the effective escape of air.

[0043] Shown in Fig. 1a and Fig. 1b, as well as the Fig. 2 and Fig. 3, each a section or the end face of a passenger compartment ventilation system. The passenger compartment ventilation system, in particular the water guide screw 5, consists of flat components, with the end face of the water guide screw having the described at least U-shaped form. Collected water inside the water guide screw 5 can drain along the flat extension of the water guide screw 5, in particular in a direction normal to the illustrated end face.

[0044] The walls of the connecting channel 2 and in particular the water guide screw 5 itself are composed of several joined components.

[0045] The water guide screw 5 is partially formed by components which simultaneously form the first wall 4 of the connecting channel 2 in sections.

[0046] The Fig. 2 and Fig. 3 show alternative embodiments of passenger compartment ventilation systems according to the invention, wherein the shapes of the water guide screws and the composition of components are different, but a reversal of incoming water is always achieved and this can thus be released again in a targeted manner via the outlet opening 1 and / or diverted along the water guide screw 5.

[0047] In the design of the water guide screw 5 according to Fig. 2, the incoming water will take a path like in Fig. 1a.

[0048] In the design of the water guide screw 5 according to Fig. 3, the incoming water will take a path due to the stronger curvature in the end area of ​​the screw, as in Fig. 1b, is collected to flow into the water guide screw 5. List of reference symbols 1 outlet opening 2 connecting channels 3 aperture 4 first wall of the connecting channel 5 water guide screw 6 second wall of the connecting channel 7 Sealing flap A Air outlet direction E Water inlet direction

Claims

[1] A passenger compartment ventilation system for ventilating the interior of a motor vehicle, comprising an outlet opening (1) of the passenger compartment ventilation system and a connecting duct (2) for discharging air in an air outlet direction (A), which connects the interior to the outlet opening (1), wherein a baffle (3) is arranged on the outside of the outlet opening (1) so that the entry of water into the connecting duct (2) through the outlet opening (1) from an untolerated angular range is reduced and is therefore limited to a tolerated angular range, wherein a water guide screw (5) with an at least approximately U-shaped cross-section is formed on a first wall (4) of the connecting duct (2), in a region onto which water entering through the outlet opening (1) in the tolerated angular range impinges, wherein the curvature of the cross-section of the water guide screw (5) increases at least in sections in the water entry direction (E), characterized bythat the water guide screw (5) forms a flat component with an at least U-shaped front side having an increasing curvature at least in sections, so that water collected inside the water guide screw (5) can run off along the flat extent of the water guide screw (5) in a direction normal to the front side, preferably vertically downwards. [2] Passenger compartment ventilation according to claim 1, characterized by that the water guide screw (5) projects from the first wall (4) in the direction of an opposite second wall (6) of the connecting channel (2), wherein there is a sufficiently large distance between the end of the water guide screw (5) and the second wall (6) for the effective escape of air. [3] Passenger compartment ventilation according to at least one of the preceding claims, characterized bythat in the connecting channel (2), in the air outlet direction (A) in front of the water guide screw (5), at least one, preferably one above the other or next to each other, sealing flap (7) opening in the air outlet direction (A) is arranged. [4] Passenger compartment ventilation according to at least one of the preceding claims, characterized by that the water guide screw (5) has a vessel-like bottom structure in order to collect the water trapped in the water guide screw (5) and run off. [5] Passenger compartment ventilation according to at least one of the preceding claims, characterized by that the water guide screw (5) has an inclined bottom in order to drain the water collected in the water guide screw (5) to the outside. [6] Passenger compartment ventilation according to at least one of the preceding claims, characterized bythat the panel (3) is fastened on one side, in the area of ​​the first wall (4), and has an inclination towards the other side outwards, so that the panel (3) complements the shape of the water guide screw (5). [7] Passenger compartment ventilation according to at least one of the preceding claims, characterized by that the water guide screw (5) is composed of at least two components. [8] Passenger compartment ventilation according to at least one of the preceding claims, characterized by that the first wall (4) of the connecting channel (2) forms the water guide screw (5) at least in sections.

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