Abstract: The invention concerns a device for distribution of a refrigerant fluid in a header of a heat exchanger comprising at least two conduits (12, 13), an external conduit (12) and an internal conduit (13), with the internal conduit accommodated in the external conduit in such a manner as to form a volume (14) for communication between the internal conduit and the external conduit, the external conduit comprising spraying orifices (120) each having an axis (120A) intersecting a principal lengthwise axis (12A) of the external conduit, the internal conduit comprising at least one communication orifice having an axis intersecting a principal lengthwise axis of the internal conduit. According to the invention, the internal conduit (13) comprises a portion (16) of reduced thickness formed by removal of material from an external face of the internal conduit (13), the external face facing toward the external conduit (12).

Abstract: A ventilation device (2) for generating an air flow through a motor vehicle heat exchanger (1) is disclosed. The ventilation device (2) includes a plurality of ducts (8), at least one air manifold (12) including at least one air flow inlet (131; 132) and ports, each duct (8) opening at one of the ends thereof into a port (14) separate from the air manifold (12), where the air manifold (12; 100; 200; 300; 400; 500) is provided with air guides (104, 402) configured to guide the air flow passing through the air manifold (12; 100; 200; 300; 400; 500).

Abstract: The invention concerns an impeller (1a, 1b, 1c, 1d, 1e, 1f) of a motor vehicle fan comprising: a cylindrical ring (2) having a center (P), blades (3) extending from the cylindrical ring (2) and toward the center (P), each blade (3) having two radially opposite ends (4, 5), referred to as the blade root end (4) and the blade tip end (5), the blade root end (4) being directed toward the center (P) and the blade tip end (5) being secured to the cylindrical ring (2), characterized in that all the blade root ends (4) are free or linked together by a central hub (20) of reduced diameter.

Abstract: The invention relates to a ventilation device intended to generate an air flow in the direction of a motor vehicle heat exchanger, comprising: spaced-apart ducts, at least one air manifold having orifices, each duct leading at one of its extremities into a separate orifice of the air manifold, each duct being provided with at least one opening for ejecting an air flow passing through said duct, the opening being separate from the extremities thereof and situated outside the air manifold, at least one duct being mounted so as to be orientable between a closed position and an open position, the device being configured to allow more air to pass through in the open position than in the closed position.