Assembly comprising a motorized fan unit fixed on a heat exchanger

Claim 1

In combination, a heat exchanger and a motorized fan unit for producing a stream of air in thermal contact with the heat exchanger, the heat exchanger comprising a rigid matrix defining a first major face and a second major face in respective planes substantially parallel to each other and defining between them a transverse thickness of the matrix, the matrix consisting of at least one row of tubes parallel to each other and to the planes, and cooling fins attached to the tubes, the motorized fan unit comprising a fixed part which includes a base plate in facing relationship with the first major face of the matrix, with securing and locating means securing the base plate to the heat exchanger, the fixed part of the fan unit defining an axis of rotation perpendicular to the planes of the major faces of the matrix, the fan unit further comprising a rotatable part carried by the fixed part for rotation on the axis of rotation, wherein the matrix has apertures through the thickness of the matrix, with a plurality of adjacent said fins of the matrix being interrupted by a void defining each aperture and extending over the whole thickness of the matrix and between two adjacent tubes in each said row, and wherein the securing and locating means comprises: first abutment elements in fixed relationship to the base plate and bearing on the first face of the matrix; second abutment elements bearing on the second face of the matrix; fastening elements extending through the matrix and clamping the matrix between the first abutment elements and second abutment elements; and spacing elements extending through the matrix and retaining each first element in spaced relationship from the corresponding second abutment element by substantially the thickness of the matrix, each fastening element and each abutment element being together disposed in one of the apertures.