Heat exchanger with spacing coil(s) and helical rib(s)

F - Mech Eng,Light,Heat,Weapons – 28 – D

Patent

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Details

F28D 7/02 (2006.01) F28F 9/013 (2006.01) F28F 13/12 (2006.01)

Patent

CA 2574284

The invention concerns a heat exchanger comprising a housing (1) having an inner wall (8) delimiting at least one inner chamber (3) incorporating at least one core (6) having one wall (7) delimiting in the chamber (3) with the opposite inner wall (8) of the housing at least one exchange cavity (9) including at least one hollow tubular coil (5) with its ends (13, 17) passing through the housing (1) to be supplied with a primary fluid, at least one inlet (11, 15) and at least one outlet (15, 11) axially opposite for circulating a secondary liquid in the exchange cavity (9) in contact with each coil (5), and at least one tangential spacing rib (18, 19), projecting relative to a wall (7, 8) opposite the coil (5) and not parallel to the axial direction of circulation, but adapted not to obstruct the circulation of the secondary liquid. The inventive heat exchanger comprises at least one helical tangential rib and at least one coil having different winding directions.

L'invention concerne un échangeur de chaleur comprenant un carter (1) ayant une paroi interne (8) délimitant au moins une chambre interne (3) incorporant au moins un noyau (6) présentant une paroi (7) délimitant dans la chambre (3) avec la paroi interne (8) du carter en regard, au moins une cavité d'échange (9) comprenant au moins un serpentin (5) tubulaire creux présentant des extrémités (13, 17) traversant le carter (1) pour pouvoir être alimenté par un fluide primaire, au moins une entrée (11, 15) et au moins une sortie (15, 11) axialement opposés pour la circulation d'un liquide secondaire dans la cavité d'échange (9) au contact de chaque serpentin (5), et au moins une nervure d'écartement, tangentielle (18, 19), s'étendant en saillie par rapport à une paroi (7, 8) en regard du serpentin (5) et non parallèlement à la direction axiale de circulation, mais adaptée pour ne pas empêcher la circulation de liquide secondaire. L 'échangeur thermique selon l'invention comprend au moins une nervure tangentielle hélicoïdale et au moins un serpentin présentant des sens d'enroulement différents.

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