VENTILATION DEVICE FOR A MOTOR VEHICLE

Abstract

A ventilation device for a motor vehicle, having a first ventilation duct for the throughflow of a first air flow, a second ventilation duct which is separate from the first ventilation duct for the throughflow of a second air flow and an air outlet which is coupled in a fluid-communicating manner to a first duct end of the first ventilation duct and to a second duct end of the second ventilation duct, for releasing an overall air flow into a passenger compartment of the motor vehicle. A first air flow strength of the first air flow and a second air flow strength of the second air flow can be set individually. The air outlet has a first deflecting wall in the direction of flow downstream of the first duct end that is designed for deflecting the first air flow such that the first air flow intersects the second air flow.

Claims

1. Ventilation device for a motor vehicle, comprising: a first ventilation duct for the throughflow of a first air flow, a second ventilation duct that is separate from the first ventilation duct for the throughflow of a second air flow, and an air outlet that is coupled in fluid communication to a first duct end of the first ventilation duct and to a second duct end of the second ventilation duct for discharging an overall air flow into a passenger compartment of the motor vehicle, wherein the overall air flow includes the first air flow and the second air flow, wherein a first air flow intensity of the first air flow and a second air flow intensity of the second air flow can be set individually, wherein the air outlet has a first deflecting wall downstream of the first duct end in the direction of flow, and wherein the first deflecting wall deflects the first air flow such that the first air flow intersects the second air flow.

2. Ventilation device according to claim 1, wherein the first deflecting wall has a first curvature, wherein the first curvature is directed away from the second air flow in the direction of flow.

3. Ventilation device according to claim 1, wherein the air outlet has a second deflecting wall downstream of the second duct end in the direction of flow, wherein the second deflecting wall is designed to deflect the second air flow toward the first air flow.

4. Ventilation device according to claim 3, wherein the second deflecting wall has a second curvature, and wherein the second curvature is directed away from the first air flow in the direction of flow.

5. Ventilation device according to claim 1, wherein the air outlet has a suction device for drawing in the first air flow and/or the second air flow and/or has a blow-out device for creating a blow-out air flow that interacts with the first air flow and/or the second air flow.

6. Ventilation device according to claim 1, wherein the first ventilation duct has a first duct inlet and the second ventilation duct has a second duct inlet, wherein the first duct inlet and the second duct inlet are coupled in fluid communication to a common primary ventilation duct in such a manner that a primary air flow flowing through the primary ventilation duct in the direction of flow is directed into the first duct inlet and/or into the second duct inlet.

7. Ventilation device according to claim 6, wherein the ventilation device has an air flow control device, wherein the air flow control device is designed for targeted control of a division of the primary air flow flowing through the primary ventilation duct between the first ventilation duct and the second ventilation duct.

8. Ventilation device according to claim 7, wherein the air flow control device has a movable flap for dividing the primary air flow between the first ventilation duct and the second ventilation duct.

9. Ventilation device according to claim 1, wherein an air outlet cross section of the air outlet has a narrowing as well as a widening in the direction of flow.

10. Motor vehicle having a passenger compartment and a ventilation device for ventilating the passenger compartment, wherein the ventilation device is designed according to claim 1, wherein the air outlet of the ventilation device opens into the passenger compartment.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus, are not limitive of the present invention, and wherein:

[0026] FIG. 1 shows an exemplary embodiment of a ventilation device according to the invention in a sectional representation,

[0027] FIG. 2 shows an outlet region of a ventilation device according to an exemplary embodiment of the invention in a sectional representation,

[0028] FIG. 3 shows an outlet region of an exemplary embodiment of a ventilation device according to the invention in a sectional representation, and

[0029] FIG. 4 shows an exemplary embodiment of a motor vehicle according to the invention in a side view.

DETAILED DESCRIPTION

[0030] In FIG. 1, a ventilation device 1 according to the invention for a motor vehicle 2 (see FIG. 4) is shown schematically in a sectional representation. The ventilation device 1 has a first ventilation duct 3 with a first duct inlet 15 and a first duct end 5, and has a second ventilation duct 4 with a second duct inlet 16 and a second duct end 6. The first ventilation duct 3 and the second ventilation duct 4 are separated from one another in a fluid-tight manner by a partition 24. The first ventilation duct 3 is bounded in a fluid-tight manner in the radial direction by a first duct wall 20 and the second ventilation duct 4 is bounded in a fluid-tight manner by a second duct wall 21. In the direction of flow S, a primary ventilation duct 17 is formed upstream of the first duct inlet 15 and of the second duct inlet 16. The primary ventilation duct 17 is bounded in a fluid-tight manner in the radial direction by the first duct wall 20 and the second duct wall 21. Arranged at the level of the first duct inlet 15 and of the second duct inlet 16 in the direction of flow S is an air flow control device 18 for the targeted division of a primary air flow H flowing through the primary ventilation duct 17 between the first ventilation duct 3 and the second ventilation duct 4. The air flow control device 18 has a pivoting device 25 and a flap 19 supported on the pivoting device 25. The pivoting device 25 is arranged on the partition 24. The flap 19 projects into the primary ventilation duct 17. By pivoting the flap 19 about the pivoting device 25, the primary air flow H can be divided into a first air flow L1 flowing through the first ventilation duct 3 and a second air flow L2 flowing through the second ventilation duct 4. In this depiction, an end of the flap 12 that is distal to the pivoting device 25 is facing the second duct wall 21 so that a larger portion of the primary air flow H flows into the first ventilation duct 3 and a smaller portion of the primary air flow H flows into the second ventilation duct 4.

[0031] Located at the first duct end 5 and the second duct end 6 is an air outlet 7 of the ventilation device 1. The air outlet 7 has a first deflecting wall 9, which is connected to the first duct wall 20. Immediately adjacent to the first duct wall 20, the first deflecting wall 9 has a first rounding 22, which is curved toward the second air flow L2. The first rounding 22 is followed in the direction of flow S by a first curvature 10 of the first deflecting wall 9, which is curved away from the second air flow L2. The first deflecting wall 9 is thus designed to deflect the first air flow L1 toward the second air flow L2. In addition, the air outlet 7 has a second deflecting wall 11, which is connected to the second duct wall 21. Immediately adjacent to the second duct wall 21, the second deflecting wall 11 has a second rounding 23, which is curved toward the first air flow L1. The second rounding 23 is followed in the direction of flow S by a second curvature 12 of the second deflecting wall 11, which is curved away from the first air flow L1. The second deflecting wall 11 is thus designed to deflect the second air flow L2 toward the first air flow L1. In this exemplary embodiment, the air outlet 7 is designed with mirror-image symmetry about a central axis M. An air outlet cross section Q of the air outlet 7 tapers in the direction of flow S from the first duct end 5 and second duct end 6 to a minimum and then widens again. As a result, the air outlet 7 is designed approximately in the manner of a de Laval nozzle. In the air outlet 7, the first air flow L1 and the second air flow L2 are combined into an overall air flow G.

[0032] In FIG. 1, the first air flow L1 is greater than the second air flow L2 on account of the position of the flap 19. Because the first air flow L1 is deflected downward by the first deflecting wall 9 in this depiction and is caused to be more intense than the second air flow L2, the overall air flow G exiting the air outlet 7 likewise flows downward. A further motion of the flap 19 toward the second duct wall 21 would further increase a proportion of the primary air flow H flowing into the first air duct 3, and therefore reduce a proportion of the primary air flow H flowing into the second ventilation duct 4 correspondingly, and bring about a stronger deflection of the overall air flow G downward. In like manner, a motion of the flap 19 toward the first duct wall 20 would reduce a proportion of the primary air flow H flowing into the first air duct 3, and therefore increase a proportion of the primary air flow H flowing into the second ventilation duct 4 correspondingly, and bring about a stronger deflection of the overall air flow G further upward.

[0033] In FIG. 2, an outlet region of a ventilation device 1 according to the invention is shown schematically in a sectional representation. In this second embodiment of the ventilation device 1 according to the invention, a blow-out device 14 for blowing out a blow-out air flow A is arranged in an upper region of the air outlet 7 downstream of the narrowest air outlet cross section Q. The blow-out device 14 is designed to blow the blow-out air flow A out in the direction of the overall air flow G—or in the direction of the first air flow L1/second air flow L2. Blowing out the blow-out air flow A causes the overall air flow G to be deflected further.

[0034] In FIG. 3, an outlet region of a ventilation device 1 according to the invention is shown schematically in a sectional representation. In this third embodiment of the ventilation device 1 according to the invention, a suction device 13 for drawing in the overall air flow G by means of a suction air flow R is arranged in a lower region of the air outlet 7 downstream of the narrowest air outlet cross section Q. In addition, a blow-out device 14 for blowing out a blow-out air flow A is likewise arranged in an upper region of the air outlet 7 downstream of the narrowest air outlet cross section Q. According to the invention, virtually any desired suction devices 13 and blow-out devices 14 can be arranged at the air outlet 7. Furthermore, a deflector can be provided, which is implemented as both a suction device 13 and a blow-out device 14. A preferred position of such a deflector corresponds to a position of the suction device 13 or blow-out device 14 that are shown.

[0035] FIG. 4 schematically shows a preferred embodiment of a motor vehicle 2 according to the invention in a side view. The motor vehicle 2 has a passenger compartment 8 and a ventilation device 1 according to the invention.

[0036] The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are to be included within the scope of the following claims.