coiled heat exchanger

A heat exchange outlet and heat exchange inlet technology is applied in the fields of blood oxygenators, capillaries of extracorporeal blood circuit heat exchangers, and extracorporeal blood circuit equipment, which can solve problems such as affecting the manufacturing process and affecting the fluid flow characteristics.

Active Publication Date: 2017-02-15
MEDTRONIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These differences affect fluid flow characteristics and can affect the manufacturing process

Method used

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  • coiled heat exchanger
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Examples

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Embodiment Construction

[0036] exist Figures 1A-1C One embodiment of a capillary bundle 20 according to the principles of the present invention and used as part of an extracorporeal blood circuit heat exchanger apparatus is shown in FIG. Capillary bundle 20 includes a plurality of microdiameter capillaries or heat transfer elements (in Figures 1A-1C Shown schematically in ) 22, core 24 and optional strips or covers 26a, 26b. Details of the various components are provided below. In general, however, the capillaries 22 are formed wound around the core 24 according to the method described below, which involves initially forming the wound capillary bundle subassembly. Strips 26 a , 26 b (where provided) serve to secure the capillary 22 around the core 24 . The capillary bundle 20 can be used in a variety of end use applications, but is particularly useful as a heat exchanger or part of a heat exchanger apparatus used in an extracorporeal blood circuit. In some embodiments, the capillary bundle 20 i...

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Abstract

A capillary bundle subassembly for an extracorporeal blood circuit heat exchanger includes a continuous piece of capillary tubing (22) wrapped around a core (24) to define a plurality of capillary layers, each layer including a plurality of capillary segments. The capillary segments respectively define opposite terminal ends adjacent opposite ends of the core. The capillary segments of each layer are aligned circumferentially relative to the central axis of the core, with each subsequent layer radially outward relative to the preceding layer. The capillary segment is non-parallel to the axis so as to be partially coiled about the axis extending between opposing terminal ends. Each capillary segment forms less than a full turn (ie, less than 360° of winding). The segments within each layer are generally parallel to each other, however, the orientation of the segments varies from layer to layer, such as a slope or angle.

Description

Background technique [0001] The present invention relates to capillary element heat exchangers. More specifically, the present invention relates to capillaries for use in extracorporeal blood circuit heat exchangers and related methods of manufacture. [0002] Fluid-to-fluid heat exchangers are used in many different industries and are often configured in conjunction with the desired end use. For example, heat exchangers are important components of extracorporeal bypass or cardiopulmonary bypass circuits. For reference, an extracorporeal blood circuit is typically used during cardiopulmonary bypass (ie, a cardiopulmonary bypass machine) to withdraw blood from the venous portion of the patient's circulatory system and return blood to the arterial portion. An extracorporeal blood circuit typically includes venous lines, venous blood line reservoirs, blood pumps, oxygenators, heat exchangers, arterial lines, and blood delivery tubing, ports, and connections interconnecting thes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M1/16A61M1/36B01D63/02B29C53/66
CPCA61M1/1698A61M1/369B01D63/025A61M1/367F28D15/046B29C53/083B29L2031/18B01D2313/221A61M1/3623Y10T29/49353
Inventor P·克卢捷R·欧森S·罗勒C·普洛特A·麦克勒维什李明M·拉克森J·诺尔G·哈克
Owner MEDTRONIC INC
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