Mixing valve

1. A mixing valve comprising:

a housing having, arranged therein;

a first flow duct ( 2 ) having a first flap mounted rotatably in the first flow duct ( 2 ) and configured to influence the throughflow cross section of the first flow duct ( 2 ); and

a second flow duct ( 3 ), the second flow duct ( 3 ) issuing into the first flow duct ( 2 ), and having a second flap mounted rotatably in the second flow duct ( 3 ) and configured to influence the throughflow cross section of the second flow duct ( 3 ),

wherein the first flow duct ( 2 ) has, downstream of the issue of the second flow duct ( 3 ), as seen in the flow direction;

a region ( 11 ) with at least two cross-sectional widenings ( 14 , 15 ), and

a first stationary guide element ( 12 ) and a second stationary guide element ( 13 ) arranged in the region ( 11 ) with the at least two cross-sectional widenings ( 14 , 15 ), each of the first and second stationary guide elements ( 12 , 13 ) projecting into the first flow duct ( 2 ), each of the first and second stationary guide elements ( 12 , 13 ) being attached by a respective first end to the housing, and each of the first and second stationary guide elements ( 12 , 13 ) extending from the housing into the first flow duct ( 2 ) in a downstream direction, each of the first and second stationary guide elements terminating, in the downstream direction, in a respective second end thereof, the second end of the first stationary guide element being spaced apart from the second end of the second stationary guide element in a direction perpendicular to the downstream direction so as to form a direct flow path between the respective second ends of the first and second stationary guide elements in the downstream direction, and

wherein the cross-sectional widenings ( 14 , 15 ) are arranged opposite one another in the first flow duct ( 2 ) so that at least a portion of the region ( 11 ) has an elliptical cross-section.

2. The mixing valve as claimed in claim 1 , wherein the cross-sectional widenings ( 14 , 15 ) are arranged symmetrically over the circumference of the first flow duct ( 2 ).

3. The mixing valve as claimed in claim 2 , wherein the first and second stationary guide elements ( 12 , 13 ) are arranged symmetrically over the circumference of the first flow duct ( 2 ).

4. The mixing valve as claimed in claim 3 , wherein the first and second stationary guide elements ( 12 , 13 ) are arranged so as to be offset to the cross-sectional widenings ( 14 , 15 ) with respect to the circumference of the first flow duct ( 2 ).

5. The mixing valve as claimed in claim 1 , wherein at least one of the first and second stationary guide elements ( 12 , 13 ) is arranged at an angle deviating from perpendicular to the flow direction.

6. The mixing valve as claimed in claim 1 , wherein the housing ( 1 ) has a first part ( 7 ) and a second part ( 8 ) and a panting plane of the first and second parts, wherein the parting plane of the first and second parts lies in the region ( 11 ) with the at least two cross-sectional widenings ( 14 , 15 ).

7. The mixing valve as claimed in claim 6 , further comprising a flange connection ( 9 , 10 ) configured to connect the first and second parts ( 7 , 8 ) to one another.

8. The mixing valve as claimed in claim 6 , wherein at least one of the first and second stationary guide elements ( 12 , 13 ) is formed in one of the first part and the second part.

9. The mixing valve as claimed in claim 1 , wherein at least one of the first and second stationary guide elements ( 12 , 13 ) is arranged as a separate component ( 18 ) in the region ( 11 ) of the first flow duct ( 2 ).

10. The mixing valve a claimed in claim 9 , wherein at least one of the first and second stationary guide elements ( 12 , 13 ) is connected to a carrier inserted into the first flow duct ( 2 ).

11. The mixing valve as claimed in claim 5 , wherein the angle deviating from perpendicular to the flow direction is between 30° and 60° .