Vehicle lights, in particular motor vehicle headlights

1 . A vehicle light ( 1 ), in particular a motor vehicle headlight ( 6 ), comprising

a number of light sources ( 2 ),

a circuit carrier ( 3 ) having a front side ( 3 a ) and a rear side ( 3 b ), wherein the light sources ( 2 ) are arranged on the front side ( 3 a ) of the circuit carrier ( 3 ),

a heat sink ( 4 ), wherein the heat sink ( 4 ) is attached flatly to the rear side ( 3 b ) of the circuit carrier ( 3 ), and

a fan ( 5 ) fastened on the heat sink ( 4 ),

characterized in that

the heat sink ( 4 ) has a base body ( 4 a ) for the planar contacting of the rear side ( 3 b ) of the circuit carrier ( 3 ), a flange ( 4 b ) to receive the fan ( 5 ), and an air duct ( 4 c ),

wherein the flange ( 4 b ) encloses an air inlet opening ( 4 d ) opening into the air duct ( 4 c ), which is designed to receive an air flow (L) generated by the fan ( 5 ), wherein the air duct ( 4 c ) extends up to an air outlet opening ( 4 e ) from which the air flow (L) exits the vehicle light,

wherein the air outlet opening ( 4 e ) is designed such that it is inclined at an angle (α) of at most 45° with respect to an incident flow angle of the air (Le) flowing in through the air inlet opening ( 4 d ), and

wherein a flow direction of air (La) flowing out through the air outlet opening ( 4 e ) is non-parallel to a plane of contact between the base body ( 4 a ) and the rear side ( 3 b ) of the circuit carrier ( 3 ).

2 . The vehicle light ( 1 ) as claimed in claim 1 , wherein the air duct ( 4 c ) is designed such that a cross-section of the air duct ( 4 c ) it tapers continuously in the direction of the base body ( 4 a ) starting from the air inlet opening ( 4 d ) toward the air outlet opening ( 4 e ).

3 . The vehicle light ( 1 ) as claimed in claim 1 , wherein an inner housing ( 7 ) engages at the air outlet opening ( 4 e ), the inner housing mounting a projection lens ( 8 ) arranged downstream from the circuit carrier ( 3 ) for manipulating the light distribution emitted by the light sources ( 2 ), wherein the inner housing ( 7 ) is enclosed by an outer housing ( 9 ), wherein the outer housing ( 9 ) has a translucent cover plate ( 9 a ) arranged downstream from the projection lens ( 8 ), wherein the inner housing ( 7 ) has an inner housing air duct ( 7 a ) which is configured to direct an air flow (L) received through the air outlet opening ( 4 e ) in the direction of the cover plate ( 9 a ).

4 . The vehicle light ( 1 ) as claimed in claim 1 , wherein cooling structural elements ( 10 ) are provided within the air duct ( 4 c ), which extend starting from a duct inner wall ( 4 c ′) and/or the base body ( 4 a ) within the air duct ( 4 c ).

5 . The vehicle light ( 1 ) as claimed in claim 4 , wherein the cooling structural elements ( 10 , 10 a , 10 b , 10 c ) include cooling fins ( 10 a ) extending parallel to a longitudinal extent of the air duct ( 4 c ), and/or include pins ( 10 b ).

6 . The vehicle light ( 1 ) as claimed in claim 4 , wherein the cooling structural elements ( 10 , 10 a , 10 b , 10 c ) include asymmetrical and irregularly arranged structures ( 10 c ).

7 . The vehicle light ( 1 ) as claimed in claim 1 , wherein the base body ( 4 a ) has a flat area ( 4 a ′), wherein the flange ( 4 b ) of the heat sink ( 4 ) is designed such that the fan ( 5 ), which is mounted flat on the flange ( 4 b ), is inclined obliquely with respect to the flat area ( 4 a ′) of the base body ( 4 a ).

8 . The vehicle light ( 1 ) as claimed in claim 1 , wherein the position of the air inlet opening ( 4 d ) and an inclination of the fan ( 5 ) with respect to the base body ( 4 a ) are selected such that an air flow (L) after entering the air inlet opening ( 4 d ), without additional deflection, hits at least a section of that area of the base body ( 4 a ) or of cooling structural elements ( 10 ) protruding therefrom which is directly opposite to the light sources ( 2 ).

9 . The vehicle light ( 1 ) as claimed in claim 8 , wherein said section comprises the area directly opposite to the highest concentration of light sources ( 2 ).

10 . The vehicle light ( 1 ) as claimed in claim 1 , wherein, in order to increase the heat transfer from the front side ( 3 a ) to the rear side ( 3 b ) of the circuit carrier ( 3 ), heat transfer means ( 11 ) are provided which penetrate the circuit carrier ( 3 ) from its front side ( 3 a ) to its rear side ( 3 b ).

11 . The vehicle light ( 1 ) as claimed in claim 10 , wherein at least some of the heat transfer means ( 11 ) are designed as VIAS ( 11 a ), which are preferably filled with heat-conducting material and are particularly preferably arranged in direct proximity to the light sources ( 2 ).

12 . The vehicle light ( 1 ) as claimed in claim 1 , wherein the heat sink ( 4 ) consists of an aluminum alloy.

13 . The vehicle light ( 1 ) as claimed in claim 1 , wherein the base body ( 4 a ) has integrally formed fastening means ( 4 f ) which are prepared for detachable connection to the circuit carrier ( 3 ) or a housing ( 7 ) engaging on the circuit carrier ( 3 ).

14 . A motor vehicle headlight ( 6 ), comprising a vehicle light ( 1 ) as claimed in claim 1 .

15 . The vehicle light ( 1 ) as recited in claim 1 , wherein the heat sink is formed in one piece from a 3D-printed aluminum alloy.