Mesh spacer for heat exchanger

A - Human Necessities – 61 – M

Patent

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Details

A61M 1/14 (2006.01) A61M 1/16 (2006.01) A61M 1/36 (2006.01) F28F 9/013 (2006.01) F28F 21/06 (2006.01)

Patent

CA 2241844

A blood heat exchange system (10) is disclosed generally comprising a plurality of small polymeric hollow conduits (32) for conveying blood. The hollow conduits (32) are formed in a flat or mat shape that are wrapped in layers around a spindle (16). Layers of the hollow conduits (32) are spaced from each other by a mesh spacer (40). The mesh spacer (40) has holes (44) through it so that a heat transfer fluid such as water may more efficiently flow over and around the outside of the hollow conduits (32). The heat transfer fluid conveys heat from or to the outside surfaces of the hollow conduits (32) which in turn transfer heat from or to the blood passing through the hollow conduits (32). The invention provides a heat exchanger (10) that is more efficient than previously known heat exchangers because the flow of the heat transfer fluid over and around the outer surface of the hollow conduits (32) is more efficient.

Un dispositif d'échange thermique avec le sang (10) comporte généralement une pluralité de petits conduits creux (32) en matière polymère destinés au transport du sang. Ces conduits creux (32) sont fabriqués à partir d'une forme plate enroulée en couches autour d'un axe (16). Les couches des conduits creux (32) sont espacées les unes des autres par un écarteur à mailles (40). Cet écarteur à mailles (40) a des trous (44) à travers lesquels un fluide caloporteur tel que l'eau peut circuler de façon plus efficace au-dessus et autour de la surface externe desdits conduits creux (32). Ledit fluide caloporteur effectue un échange thermique avec les surfaces externes des conduits creux (32) qui à leur tour effectuent un échange thermique avec le sang traversant lesdits conduits creux (32). Cette invention concerne également un échangeur thermique (10) qui s'avère plus efficace que les échangeurs thermiques connus de l'état antérieur de la technique du fait que l'écoulement du fluide caloporteur au-dessus et autour de la surface externe des conduits creux (32) est plus efficace.

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