Air discharge assembly unit, especially for routing air into the interior space of a vehicle

1. An air discharge assembly unit for routing air into an interior space of a vehicle, the air discharge assembly unit comprising:

an air routing duct defined by a duct wall of a first assembly unit part for routing primary air from a primary air inlet area to an air outlet area where the air routing duct ends, the air outlet area having an air outlet opening in a closing wall of a second assembly unit part, wherein the duct wall is tapering in the direction of a duct longitudinal axis, such that the air routing duct has a flow cross-sectional area that decreases, at least in some sections, in the direction of the air outlet area, away from the primary air inlet area, to a duct area with a minimal flow cross-sectional area provided in an axial end area of the duct wall; and

a secondary air inlet area for the inlet of secondary air into the air routing duct in an area of the duct area with the minimal flow cross-sectional area, the secondary air inlet area comprising at least one primary secondary air inlet opening provided axially between the end area of the duct wall and the closing wall, wherein the secondary air is added to the primary air through the at least one primary secondary air inlet opening, the secondary air inlet area further comprising at least one secondary secondary air inlet opening, wherein the at least one secondary secondary air inlet opening is open towards a secondary air flow space leading to the at least one primary secondary air inlet opening, the secondary air entering the secondary air flow space through the at least one secondary secondary air inlet opening and exiting the secondary air flow space through the at least one primary secondary air inlet opening for being added to the primary air, a flow cross-sectional area of the at least one secondary secondary air inlet opening being variable, the second assembly unit part has the air outlet opening for the primary air being routed through the air routing duct and the at least one primary secondary air inlet opening for the secondary air added to the primary air; and

the first assembly unit part has at least one first secondary opening area, the second assembly unit part has at least one second secondary opening area, and the at least one first secondary opening area and the at least one second secondary opening area are movable in relation to one another by rotating the second assembly unit part in relation to the first assembly unit part for providing the at least one secondary secondary air inlet opening with variable flow cross-sectional area.

2. An air discharge assembly unit in accordance with claim 1 , wherein the primary secondary air inlet opening surrounds a longitudinal axis of the air routing duct in a ring-shaped pattern.

3. An air discharge assembly unit in accordance with claim 2 , wherein the primary secondary air inlet opening has a truncated cone-shaped opening cross-sectional geometry.

4. An air discharge assembly unit in accordance with claim 1 , wherein the at least one secondary secondary air inlet opening is arranged radially outside the at least one primary secondary air inlet opening relative to a longitudinal axis of the air routing duct.

5. An air discharge assembly unit in accordance with claim 4 , wherein the secondary air flow space surrounds the longitudinal axis of the duct in an essentially ring-shaped pattern.

6. An air discharge assembly unit in accordance with claim 1 , wherein the duct wall tapers, at least in some areas, away from the primary air inlet area.

7. An air discharge assembly unit in accordance with claim 6 , wherein the duct wall provides the duct area with minimal flow cross-sectional area, in an end area of said duct wall, located at a distance from the primary air inlet area.

8. An air discharge assembly unit in accordance with claim 6 , wherein a second assembly unit part has an air outlet opening for the primary air being routed through the air routing duct and the at least one primary secondary air inlet opening for the secondary air added to the primary air, wherein the air outlet opening essentially defines the air outlet area.

9. An air discharge assembly unit in accordance with claim 1 , wherein the air outlet opening has a larger flow cross-sectional area than the duct area with the minimal flow cross-sectional area.

10. An air discharge assembly unit in accordance with claim 1 , wherein:

the at least one primary secondary air inlet opening is defined in an area providing the air outlet opening between the duct wall of the first assembly unit part and the second assembly unit part.

11. An air routing system for routing air in an interior space area of a vehicle, the air routing system comprising:

at least one air discharge assembly unit comprising:

an air routing duct defined by a duct wall of a first assembly unit part for routing primary air from a primary air inlet area to an air outlet area where the air routing duct ends, the air outlet area having an air outlet opening in a closing wall of a second assembly unit part, wherein the duct wall is tapering in the direction of a duct longitudinal axis, such that the air routing duct has a flow cross-sectional area that decreases, at least in some sections, in the direction of the air outlet area, away from the primary air inlet area, to a duct area with a minimal flow cross-sectional area provided in an axial end area of the duct wall; and

a secondary air inlet area for the inlet of secondary air into the air routing duct in an area of the duct area with the minimal flow cross-sectional area, the secondary air inlet area comprising at least one primary secondary air inlet opening provided axially between the end area of the duct wall and the closing wall, wherein the secondary air is added to the primary air through the at least one primary secondary air inlet opening, the secondary air inlet area further comprising at least one secondary secondary air inlet opening, wherein the at least one secondary secondary air inlet opening is open towards a secondary air flow space leading to the at least one primary secondary air inlet opening;

the second assembly unit part having an air outlet opening for the primary air being routed through the air routing duct and the at least one primary secondary air inlet opening for the secondary air added to the primary air;

the at least one secondary secondary air inlet opening is arranged radially outside the at least one primary secondary air inlet opening relative to a longitudinal axis of the air routing duct and

the first assembly unit part has at least one first secondary opening area, the second assembly unit part has at least one second secondary opening area, and the at least one first secondary opening area and the at least one second secondary opening area are movable in relation to one another by rotating the second assembly unit part in relation to the first assembly unit part for providing the at least one secondary secondary air inlet opening with variable flow cross-sectional area.

12. An air routing system in accordance with claim 11 , wherein the air outlet area as well as at least one secondary secondary air inlet area open towards the space area.

13. An air routing system in accordance claim 11 , wherein:

the at least one primary secondary air inlet opening is defined in an area providing the air outlet opening between the duct wall of the first assembly unit part and the second assembly unit part.