一种带过滤功能的微型膜式氧合器

Abstract

本实用新型提供了一种带过滤功能的微型膜式氧合器，包括圆柱形壳体，轴向一端设液体进口，另一端设氧气进口和液体出口。壳体内沿液体流向设置过滤组件和氧合组件，两者通过液体通道联通，液体通道沿径向向外设置为空腔。过滤组件包括带孔洞的内、外环筒及其间的过滤膜，两端经壁面封装，通入过滤器的液体依次穿过外环筒、过滤膜和内环筒，流入液体通道。氧合组件包括内、外环壁及其间的氧合膜，两端经壁面封装，内环壁内部设有分割壁；液体经液体通道、内环壁上的进液孔进入氧合膜，氧气从氧气进口进入，经氧合后的液体从外环壁上的出液孔排出。本实用新型的微型膜式氧合器将氧合器和过滤器集成于一体且结构小型化，结构简单，还具备低阻力性能。

Claims

1. A micro-membrane oxygenator with filtration function, characterized in that, The device includes a cylindrical shell. One end of the shell has a liquid inlet along its axial direction, and the other end has an oxygen inlet and a liquid outlet. A filter assembly is disposed inside the shell near the liquid inlet, and an oxygenation assembly is disposed on the other side. The filter assembly and the oxygenation assembly are connected by a liquid channel. The liquid channel is radially outwardly oriented as a cavity, and a gas outlet is located on the wall of the shell within this cavity. The filtration assembly includes an inner ring cylinder and an outer ring cylinder. Both the inner and outer ring cylinders have several holes on their walls, and the cavity between them is provided with several layers of radially arranged filter membranes. One end of the outer ring cylinder, filter membranes, and inner ring cylinder is sealed by a first wall surface, and the other end is sealed by a second wall surface. The outer periphery of the second wall surface is sealed to the housing. The liquid channel is located on the second wall surface inside the inner ring cylinder. The oxygenation assembly includes an inner ring wall and an outer ring wall. An oxygenation membrane is wound around the inner ring wall and fills the space between the inner and outer ring walls. A third wall surface is provided on the liquid inlet end face of the inner and outer ring walls, and the outer side of the oxygenation membrane between the inner and outer ring walls is encapsulated by the third wall surface. The outer periphery of the third wall surface is sealed to the housing. The outer side of the oxygenation membrane between the inner and outer ring walls at the other end is encapsulated by a fourth wall surface. A dividing wall is provided in the cross-section of the inner ring wall. A liquid inlet communicating with the liquid channel is opened on the third wall surface inside the inner ring wall. A plurality of liquid inlet holes are opened circumferentially on the inner ring wall between the dividing wall and the third wall surface. A plurality of liquid outlet holes are opened circumferentially on the outer ring wall. One end of the outer ring wall near the fourth wall surface extends to the wall surface of the housing and is sealed to the housing. The liquid outlet is located on the housing outside the outer ring wall, and the oxygen inlet is located on the housing inside the outer ring wall.

2. The micro-membrane oxygenator of claim 1, wherein, A buffer port is provided at one end of the liquid inlet on the housing, and the buffer port is connected to a pressure buffer, which is a retractable and sealed structure.

3. The micro-membrane oxygenator of claim 1, wherein, The filter membrane is a pleated filter membrane, and 2 to 5 layers of pleated filter membranes are arranged between the inner ring cylinder and the outer ring cylinder.

4. The micro-membrane oxygenator of claim 1, wherein, The oxygenation membrane is a hollow fiber membrane, comprising several hollow fiber microtubes that are open at both ends and allow air to pass through, and the membrane is woven from the hollow fiber microtubes.

5. The micro-membrane oxygenator of claim 1, wherein, The oxygenated membrane is overlapped with a mesh of the same size and then wound around the inner ring wall. The mesh has a lower weave density than the oxygenated membrane, and the mesh is made of soft plastic or fiber.

6. The micro-membrane oxygenator of claim 4, wherein, The ratio of the gap between two adjacent hollow fiber microtubes to the inner diameter of the hollow fiber microtube is (0.3~2):

1.

7. The micro-membrane oxygenator of claim 1, wherein, The dividing wall is located close to the third wall surface.

8. The micro-membrane oxygenator of claim 7, wherein, The ratio of the distance between the dividing wall and the third wall to the distance between the dividing wall and the fourth wall is 1:(1.5~5).

9. The micro-membrane oxygenator of claim 1, wherein, The liquid outlet is located on the outer ring wall near the fourth wall surface.

10. The micro-membrane oxygenator of claim 9, wherein, A plurality of secondary liquid outlet holes are formed circumferentially on the side of the outer ring wall near the third wall surface. The number of secondary liquid outlet holes is less than the number of liquid outlet holes, and the diameter of the secondary liquid outlet holes is also less than the diameter of the liquid outlet holes.

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