Medical heat exchanger, manufacturing method thereof and...

A - Human Necessities – 61 – M

Patent

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Details

A61M 1/36 (2006.01) A61M 1/14 (2006.01)

Patent

CA 2712907

A medical heat exchanger includes a thin tube bundle 2 in which a plurality of heat transfer thin tubes 1 for letting heat medium liquid flow therethrough are arranged and stacked, seal members 3a to 3c sealing the thin tube bundle while allowing both ends of the heat transfer thin tubes to be exposed and forming a blood channel 5 which allows blood to flow therethrough so that the blood comes into contact with each outer surface of the heat transfer thin tubes; a housing 4 containing the seal members and the thin tube bundle and provided with an inlet port 8 and an outlet port 9 of the blood positioned respectively at both ends of the blood channel; and a pair of heat transfer thin tube headers 6, 7 forming flow chambers 14a, 14b, 15a, 15b that respectively surround both ends of the thin tube bundle and having an inlet port 6a and an outlet port 7a of the heat medium liquid. The thin tube bundle is divided into a plurality of thin tube bundle units 12a to 12c, and the heat transfer thin tube headers are configured so that the heat medium liquid passes through the plurality of the thin tube bundle units successively. Heat exchange efficiency is enhanced while the flow speed of the heat medium liquid flowing through the heat transfer thin tubes is increased to suppress the increase in volume of the blood channel.

L'invention concerne un faisceau (2) de tubules formé par mise en place et stratification d'une pluralité de tubules thermoconductrices (1) à travers lesquelles un milieu liquide chauffant est acheminé; des éléments d'étanchéité (3a-3c) auxquels sont exposés les deux extrémités des tubules thermoconductrices et qui scellent le faisceau de tubules, formant un passage (5) d'écoulement pour le sang qui achemine le sang de telle sorte qu'il entre en contact avec la surface extérieure de chaque tubule thermoconductrice; un logement (4) qui, en plus d'abriter les éléments d'étanchéité et le faisceau de tubules, est pourvu d'un orifice d'amenée (8) et d'un orifice d'évacuation (9) pour le sang, lesquels orifices sont placés respectivement aux deux extrémités du passage d'écoulement pour le sang; et une paire de collecteurs (6, 7) de tubules thermoconductrices formant des chambres d'écoulement (14a, 14b, 15a, 15b) pour renfermer les deux extrémités du faisceau de tubules respectivement et présentant un orifice d'amenée (6a) et un orifice d'évacuation (7a) pour le milieu liquide chauffant. Le faisceau de tubules est divisé en plusieurs ensembles de blocs de faisceaux de tubules (12a-12c), et les collecteurs des tubules thermoconductrices sont fabriqués de telle sorte que le milieu liquide chauffant est acheminé successivement à travers les multiples ensembles de blocs de faisceaux de tubules. Ce mode de réalisation permet à la fois d'augmenter le débit du milieu liquide chauffant qui s'écoule à travers les tubules thermoconductrices, de réguler l'augmentation du volume du passage d'écoulement pour le sang et d'augmenter le rendement de l'échange thermique.

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