Multichannel flat tube

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

Patent

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Details

F28F 1/00 (2006.01) F16L 9/19 (2006.01) F28F 1/02 (2006.01) F25B 9/00 (2006.01)

Patent

CA 2312149

The invention relates to a multichannel flat tube for a heat exchanger comprising a plurality of parallel flow channels (2) which are adjacent to one another in a transversal direction with regard to the tube. According to the invention, the flow channels (2) have an oval cross-section, and/or the outer surfaces of the tube have a wave-shaped cross-contour which corresponds to the flow channels in such a way that the flat tube is thinner in the vertical direction of the tube between each two flow channels than in the area of a respective flow channel. The inventive flat tube can be designed for high working pressures while having a relatively low weight and a relatively high heat exchanging capacity. The inventive multichannel flat tube is used, for example, in CO2 motor vehicle air conditioning systems.

L'invention concerne un tuyau plat multicanal destiné à un échangeur de chaleur. Ce tuyau comporte plusieurs canaux d'écoulement (2) placés les uns à côté des autres et parallèles, dans le sens transversal par rapport au tuyau. Selon l'invention, les canaux d'écoulement (2) présentent une section ovale et/ou les surfaces extérieures du tuyau présentent un contour transversal ondulé, correspondant aux canaux d'écoulement, cela de telle sorte que le tuyau plat est, dans le sens vertical, chaque fois entre deux canaux d'écoulement, plus mince que dans la zone d'un canal d'écoulement. Le tuyau plat selon l'invention est destiné à des pressions de service élevées, tout en présentant un poids relativement faible et une capacité de transfert thermique relativement élevée. Ce tuyau est destiné à être utilisé, par exemple, dans des installations de climatisation à CO¿2? de véhicules automobiles.

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