Air vent for ventilation systems
An air vent is provided that is capable of delivering a distributed divergent air flow with a predominant direction of flow that can be changed within a wide range of mutually perpendicular directions. In one embodiment, the air vent has an outlet grid that is generally ball shaped and that is rotatably mounted at an end of an air duct for rotation about its center. Each of the multiple outlet openings of the grid points to a direction that is different from pointing directions of all other outlet openings so that a divergent air flow is obtained. By rotating the ball shaped grid about its center, the predominant direction of air flow can nevertheless be changed in a within a wide range.
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This application is a divisional of co-pending patent application Ser. No. 10/388,790, filed Mar. 14, 2003.
FIELD OF THE INVENTIONThe present invention relates to an air vent for ventilation systems, especially in vehicles.
Conventional air vents in vehicles have an outlet opening with a set of parallel lamellas that are jointly pivoted to deflect an air flow. When an air flow is to be deflected both horizontally and vertically, a second set of lamellas is provided upstream from a first set, and the first and second sets of lamellas are pivoted about mutually perpendicular axes. With an air vent of this configuration, an air flow can be deflected in a wide range between “up” and “down” and between “left” and “right”, but always remains a directed flow, causing turbulence and local zones of high air flow velocities within the vehicle cabin whereas little movement of air occurs in other regions.
BACKGROUND OF THE INVENTIONThe present invention provides an air vent that is capable of delivering a distributed divergent air flow with a predominant direction of flow that can be changed within a wide range of mutually perpendicular directions.
BRIEF SUMMARY OF THE INVENTIONIn a first embodiment of the invention, the air vent has an outlet grid that is generally ball shaped and that is rotatably mounted at an end of an air duct for rotation about its center. Each of the multiple outlet openings of the grid points to a direction that is different from pointing directions of all other outlet openings so that a divergent air flow is obtained. By rotating the ball shaped grid about its center, the predominant direction of air flow can nevertheless be changed in a within a wide range.
In a second embodiment of the invention, the air vent has an outlet grid formed of a plurality of parallel grid vanes the ends of which are pivotally mounted at the outlet end of an air duct. Each grid vane has multiple air escape openings. The grid vanes can be pivoted between a condition where they together form a substantially continuous grid surface, providing a distributed or divergent air flow, and multiple conditions where they define parallel air escape slots and act as lamellas to provide a directed air flow.
In a third embodiment of the invention, an air vent device is comprised of a cylindrical duct member that has a first end connected to an air duct, a second end closed by a wall and a circumferential wall that forms an air outlet grid. Multiple air escape openings of the grid point into different directions, delivering a distributed or divergent flow of air. Preferably, movable air deflection flaps are mounted within the cylindrical duct member so that a predominant orientation of air flow can be adjusted.
Three different embodiments of the air vent are shown in the accompanying drawings and are defined in the following claims.
BRIEF DESCRIPTION OF THE DRAWINGSFurther features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the appending drawings. In the drawings:
An air vent as shown in FIGS. 1 to 4 has a cylindrical tube section 10 with one end connected to an end of an air duct 12 and another end fitted with an outlet grid 14. Outlet grid 14 is generally ball shaped and is assembled of a substantially semispherical shell member 16 and an annular support member 18. Support member 18 has an outer surface spherically curved to a radius identical with that of shell member 16 so that shell member 16 and support member 18 together form a ball portion which is about 60 to 80 percent of a total 360° ball.
Support member 16 and shell member 18 each have multiple outlet openings each of which forms a minute air escape nozzle. Each of these multiple air escape nozzles may point into a different direction so that, as a whole, outlet grid 14 acts to provide a distributed or divergent flow of air from an air stream supplied through air duct 12. Alternatively, as illustrated in
Support member 18 has four integrally molded baffle elements 20 that extend radially and are spaced circumferentially at 90° from each other. Baffle elements 20 have radially inner ends joined by a hub member 22. Hub member 22 is pivotally mounted on a ball member 24 carried on a free end of an axially extending grid carrier stud 26. As seen in
By virtue of pivotally mounting support member 18 on grid carrier stud 26, outlet grid 14 may be rotated in any direction about its center, as materialized by ball member 24. Accordingly, and as understood by contemplating
Turning now to the embodiment shown in FIGS. 5 to 11, an air vent has an outlet grid, generally designated at 30, composed of five parallel grid vanes 30a, 30b, 30c, 30d and 30e. Each of these grid vanes is pivotally mounted in a frame (not shown). The pivot axes of grid vanes 30a to 30e are parallel and spaced from each other so that, in a condition shown in
In a pivotal condition shown in
With reference to
With reference now to FIGS. 12 to 14, an embodiment of an air vent is shown wherein a cylindrical duct member 40 has a first end connected to a sleeve 42 for connection to an air duct and a second end closed by a wall. A circumferential envelope area of duct member 40 is formed as an outlet grid 44 with multiple outlet openings. As seen in
An envelope wall section opposite outlet grid 44 is provided with parallel elongate outlet slots 46 separated by webs 48 which extend in the axial direction of duct member 40. Pivotally mounted inside of duct member 40 are generally circular baffle plates 50. Each baffle plate 50 is mounted on an axis that extends diametrically of duct member 40, and all baffle plates are linked for joint pivotal movement between a radial position as seen in
On the side of outlet slots 46, the air vent delivers a directed flow of air, the direction of which is adjusted by jointly pivoting baffle plates 50. On the side of outlet grid 44, although a divergent flow of air is supplied, a predominant direction of air flow is be obtained by adjusting baffle plates 50 to any pivotal position different from the radial position shown in
In addition, the air vent as a whole can be rotated about the axis of duct member 40 if connection sleeve 42 is received in an end of an air duct with a sliding fit that permits rotation, so that the air vent can deliver either of a directed or a divergent flow of air in any direction.
Claims
1. An air vent for ventilation system in a vehicle, comprising an outlet grid having multiple outlet openings, wherein said outlet grid is generally ball shaped and is rotatably mounted at an end of an air duct for rotation about its center.
2-17. (canceled)
18. An air vent for a ventilation system in a vehicle, comprising an outlet grid having several parallel grid vanes, each of said grid vanes being pivotally mounted in a frame and having multiple outlet openings, said grid vanes being jointly movable to assume pivotal positions where they together form a substantially continuous surface, and said grid vanes further being jointly movable to assume pivotal positions where they together define parallel air outlet slits.
19. The air vent according to claim 18, wherein each of said outlet openings is a nozzle defined by air deflection surfaces.
20. The air vent according to claim 19, wherein said nozzles point in diverging directions.
21. The air vent according to claim 18, wherein a set of movable baffle members is mounted in the frame upstream of said grid vanes.
22. The air vent according to claim 21, wherein said baffle members are jointly pivotal about parallel axes that are perpendicular to pivotal axes of the grid vanes.
Type: Application
Filed: Oct 24, 2005
Publication Date: Apr 13, 2006
Applicant:
Inventor: Thomas Dippel (Neuhemsbach)
Application Number: 11/257,163
International Classification: B61D 27/00 (20060101);