A surface radiator (100), comprising:
- a plurality of light-emitting semiconductor components (2);
- and
- a housing body (1),
- wherein the housing body (1) has a cooling channel (10, 11) for a coolant, the cooling channel (10, 11) including a first cooling channel (10) and a second cooling channel (11),
- wherein the cooling channel (10, 11) forms at least a part of a fluid path (a),
- wherein the fluid path (a) extends from an inlet opening (3) to a return opening (4),
- wherein the inlet opening (3) and the return opening (4) are formed on the housing body (1),
- wherein an emission window (5) overlies the light-emitting semiconductor components (2),
- wherein the emission window (5) defines a front side of the surface radiator (100),
- wherein the emission window (5) is transparent for an incident radiation(S),
- wherein the incident radiation(S) can be emitted by the light-emitting semiconductor components (2),
- wherein the emission window (5) is arranged on the housing body (1),
- wherein the housing body (1) provides a fastening surface (12) for the light-emitting semiconductor components (2),
- wherein the fastening surface (12) is spaced apart from the emission window (5),
- wherein the emission window (5) is arranged on the housing body (1) in a fluid-tight manner,
- wherein the housing body (1), the light-emitting semiconductor components (2), and the emission window (5) delimit an emission chamber (6),
- wherein the fluid path (a) is defined by
- i) the first cooling channel (10) extending from the inlet opening (3) through the housing body (1) to an orifice opening (13) formed on a first side adjacent to the fastening surface (12), and
- ii) the emission chamber (6) from the orifice opening (13) to a discharge opening (14) formed on a second side facing away from the first side adjacent to the fastening surface (12), and
- iii) the second cooling channel (11) extending from the discharge opening (14) through the housing body (1) to the return opening (4),
- wherein the coolant (K) is an electrically insulating liquid,
- wherein the electrically insulating liquid is transparent for the incident radiation(S),
- wherein a connecting chamber (15) is formed on the front side in the housing body (1) adjacent to the fastening surface (12),
- wherein the connecting chamber (15) is open to the emission chamber (5),
- wherein a connecting opening (16b) is formed on the housing body (1),
- wherein the connecting opening (16b) is connected to the connecting chamber (15),
- wherein a connecting line (22) for connecting the light-emitting semiconductor components (2) extends into the connecting chamber (15),
- wherein a ballast is provided on a printed circuit board (20),
- wherein the plurality of light-emitting semiconductor components (2) is fastened to the fastening surface (12) by the printed circuit board (20),
- wherein a pair of connecting contacts (21) for a row of the light-emitting semiconductor components (2) is in each case formed on a side of the printed circuit board (20) close to the connecting chamber (15),
- wherein each connecting contact (21) is connected to a respective connecting line (22) and the ballast is provided between the connecting contacts (21) and the light-emitting semiconductor components (2) or
- the ballast (24) for the light-emitting semiconductor components (2) is arranged in the connecting chamber (15), connected to the connecting line (22).