Fan housing for a heat exchanger, particular for motor vehicles

1. A fan housing for an air-flow heat exchanger comprising a fan blower comprising:

an axial-flow fan and a drive motor,

wherein the blower is connected to the fan housing by struts, and wherein the struts have a cross-sectional profile with a front edge and a rear edge and a strut height h and a strut width b,

wherein the front edges of the struts are arranged in a non-planar, spherical or spheroidal surface;

wherein the surface is generated by a non-linear curve branch rotating about the axis of rotation of the blower, the branch comprising a distance x from a radial plane that increases with increasing distance from the axis of rotation,

wherein the curve branch is curved in the air-flow direction L;

wherein the struts are arranged to form a strut lattice having points of intersection; and

wherein the points of intersection are arranged on an ellipse.

2. The fan housing as claimed in claim 1 , wherein the struts are arranged inclined or curved in opposite circumferential directions.

3. The fan housing as claimed in claim 1 , wherein the rear edges of the struts are arranged in a non-planar, spherical or spheroidal surface.

4. A fan housing for an air-flow heat exchanger comprising a fan blower comprising:

an axial-flow fan and a drive motor,

wherein the blower is connected to the fan housing by struts, and wherein the struts have a cross-sectional profile with a front edge and a rear edge and a strut height h and a strut width b,

wherein the front and/or the rear edges of the struts are arranged in a non-planar, spherical or spheroidal surface,

wherein the strut cross section increases with increasing distance from the axis of rotation,

wherein the struts are arranged to form a strut lattice having points of intersection, and

wherein the points of intersection are arranged on an ellipse.

5. The fan housing as claimed in claim 4 , wherein the strut height h increases with increasing distance from the axis of rotation.

6. The fan housing as claimed in claim 4 , wherein the strut width b increases with increasing distance from the axis of rotation.

7. A fan housing for an air-flow heat exchanger comprising a fan blower comprising:

an axial-flow fan and a drive motor,

wherein the blower is connected to the fan housing by struts,

wherein the struts are arranged inclined or curved in opposite circumferential directions and form a strut lattice having points of intersection; and

wherein the points of intersection are arranged on an ellipse.

8. The fan housing as claimed in claim 7 , wherein the struts take the form of compression struts in one circumferential direction and tensile struts in the other circumferential direction, the compression struts having a larger cross section than the tensile struts.

9. The fan housing as claimed in claim 7 , wherein the points of intersection are arranged in areas having a basically axial throughflow.

10. The fan housing as claimed in claim 7 , wherein a length ratio of the major axes of the ellipse corresponds to the reciprocal of a length ratio of the side edges of the fan housing parallel to each of these respectively.

11. The fan housing as claimed in claim 7 , wherein the struts intersect each other within a plane at the points of intersection.

12. A fan housing for an air-flow heat exchanger comprising a fan blower comprising:

an axial-flow fan and a drive motor,

wherein the blower is connected to the fan housing by struts,

wherein the struts are arranged inclined or curved in opposite circumferential directions and form a strut lattice having points of intersection;

wherein the points of intersection are arranged on an ellipse; and

wherein the struts are fixed to each other at the points of intersection.