Abstract: A heat exchanger, in particular for a motor vehicle, comprises a collector box and at least one longitudinal row of multi-channel flat tubes through which a first fluid can flow. The collector box is made up of stacked plates including: a header plate with at least one row of mounting slots receiving an end portion of each tube, a distribution plate comprising at least one row of distribution slots, a cover plate comprising at least one row of collecting apertures which connect at least some of the distribution slots to a manifold, at least one collecting aperture being arranged between two adjacent distribution slots. Said collecting aperture is arranged in a main recess provided in the bottom face of the cover plate.

Abstract: A pipe connecting structure for a heat exchanger having a header portion or manifold defined by a plurality of parallel elongate header tubes, connector block having a side face adapted to abut against a side region of an outer one of the header tubes and connection means configured to connect a pipe thereto, and joining means. The joining means include at least one elongate tubular member having a first end adapted to be inserted through a hole formed in a first side wall of at least the outer one of the header tubes, and a second end extending through a corresponding hole in the side face of the connector block, whereby the second end communicates with the connection means.