JPH0549304B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a heat exchanger for blood. In detail, by circulating blood outside the tubules,
The present invention relates to a blood heat exchanger for maintaining, cooling, or rewarming a patient's blood at a constant temperature during surgery or the like by circulating a heat exchange medium inside a thin tube.

[Prior Art] Conventionally, there are heat exchangers that house heat exchange tubes (for example, a large number of heat exchange thin tubes or coiled tubes).

In the past, it was common to circulate blood within a thin tube and to circulate a heat exchange medium between the thin tube and the housing (Japanese Patent Application Laid-Open No. 1983-1999-1).
Publication No. 134297). Recently, a system has been developed in which a heat exchange medium is circulated inside the capillary tube and blood is circulated between the capillary tube and the housing (Japanese Utility Model Publication No. 124638/1983).

[Problems to be Solved by the Invention] FIG. 7 shows a partial sectional view of the heat exchanger disclosed in the above-mentioned Japanese Patent Application Laid-open No. 134297/1982.

In this heat exchanger, a heat exchange thin tube 51 is fixed to the end of the housing 50 by a partition 52, and a cap 56 having a fluid port 54 outside the partition 52 is attached to the end of the housing 50 by screwing. It is being However, when the cap 56 is screwed onto the housing 50, the cap 5
In some cases, the fluid port 54 provided at 0 cannot be placed in any desired position, and therefore, it is sometimes difficult to attach a circuit or the like to the port. Further, in the heat exchanger disclosed in Japanese Utility Model Application Publication No. 61-124638, a rectangular cylindrical housing is used as the housing. The cap, which has a heat exchange medium introduction port and a discharge port attached to the end of the housing, and forms a medium inflow chamber and a medium outflow chamber also has a rectangular cylindrical shape. It cannot be attached to the end of the cap's housing and is fixed using adhesive. However, it is not easy to fix the corners of the rectangular cylindrical cap in a liquid-tight manner, and there is a risk that the heat exchange medium may leak out.

[Means for Solving the Problems] Therefore, an object of the present invention is to enable heat exchange medium introduction ports and discharge ports to be set in advance at arbitrary positions, and to further provide a medium inflow port formed outside the partition wall. An object of the present invention is to provide a heat exchanger for blood that can reliably maintain liquid tightness between a chamber, a medium outflow chamber, and a partition wall.

A device that achieves the above purpose is provided with a heat exchange medium introduction port provided at one end, a heat exchange medium discharge port provided at the other end, and a position between the medium introduction port and the medium discharge port. an integrally molded elliptical cylindrical housing having a blood inflow port and a blood outflow port; a large number of heat exchange thin tubes housed within the substantially cylindrical housing; and both ends of the thin tubes connected to the cylindrical housing. a blood chamber fluid-tightly fixed to the housing and communicating with the blood outflow port and the blood inflow port; and a heat exchange medium chamber formed by the tube body and communicating with the medium introduction port and the medium discharge port. and a sealing member that seals both ends of the housing, and the medium introduction port is
The blood heat exchanger is provided approximately tangentially to the housing.

Preferably, the housing has a space near where the blood inflow port is located, in which the thin tube does not exist. Further, near where the blood outflow port of the housing is located,
It is preferable that the capillary has a space in which the thin tube does not exist. Furthermore, it is preferable that the partition wall is formed of a potting agent. Furthermore, it is preferable that the partition wall includes a porous plate that grips the end of the thin tube, and a potting agent that liquid-tightly fixes the porous plate and the thin tube.
Furthermore, it is preferable that the porous plate has a large number of holes formed such that the inner diameter of one end is larger than the outer diameter of the thin tube and the inner diameter of the other end is smaller than the outer diameter of the thin tube. Preferably, the medium discharge port is installed in a direction facing toward the inner surface of the housing at a predetermined angle from the center of the housing. Furthermore, it is preferred that the media outlet port is mounted substantially tangentially to the outer surface of the housing.

The blood heat exchanger of the present invention will be explained in detail using the embodiments shown in FIGS. 1 to 4.

The heat exchanger 1 of the present invention has a heat exchange medium introduction port 8 provided at one end, a heat exchange medium discharge port 9 provided at the other end, and a space between the medium introduction port 8 and the medium discharge port 9. an integrally molded substantially cylindrical housing 2 having a blood inflow port 6 and blood outflow ports 7a, 7b provided at positions;
A large number of thin tubes 3 for heat exchange are housed in a cylindrical housing 2, and both ends of the thin tubes 3 are fixed to the cylindrical housing 2 in a fluid-tight manner, and the inside of the housing 2 is communicated with a blood outflow port 6 and a blood inflow port 7. blood chamber 12
and a heat exchange medium chamber 13 that communicates with the medium introduction port 8 and the medium discharge port 9 and is formed within the pipe body 3, and a sealing member that seals both ends of the housing 2. 10 and 11, and the medium introduction port 8 is provided approximately in the tangential direction of the housing 2.

Therefore, an embodiment of the heat exchanger of the present invention shown in FIG. 1 will be explained in more detail.

FIG. 1 is a partial sectional view of the heat exchanger of the present invention, and FIG. 2 is a sectional view taken along the line X--X of the heat exchanger of FIG.

A substantially cylindrical housing 2 of the heat exchanger 1 accommodates a large number of heat exchange thin tubes 3 therein. The shape of the housing 2 is preferably cylindrical.
In addition, the materials used for the housing 2 include:
Various materials can be used, such as polycarbonate, acrylic-styrene copolymer, and acrylic-butylene-styrene copolymer. A blood inflow port 6 is provided at the bottom of the side wall of the cylindrical housing 2, and two blood outflow ports 7a and 7b are provided at the top of the side wall of the housing 2. In particular, in the one shown in FIG. 1, the blood inflow port 6 is provided at the lower right portion. Note that the blood inflow port may be provided at the lower part of the center of the housing 2. Blood outflow ports 7a and 7b are provided on the left and right upper portions. By providing these at both ends of the housing 2, pressure loss at the blood outflow port can be reduced, and blood can easily flow out, which is preferable. Further, the shape is not limited to this, and the number of blood outflow ports may be only one, and the positions of the blood inflow port and the blood outflow port may be provided, for example, at the center of the housing.

In the embodiment shown in FIG. 1, the blood inflow port 6 is attached at a predetermined angle from the center of the housing 2 toward the inner surface of the housing. Attached tangentially. Also, similarly,
The blood outflow ports 7a and 7b are also oriented toward the inner surface of the housing 2 at a predetermined angle from the center of the housing.
Specifically, it is attached approximately tangentially to the outer surface of the housing. By adopting such a shape, the opening end surfaces of the blood outflow port and the blood inflow port in the housing 2 are widened, which is preferable. Further, the shape is not limited to this, and the blood outflow port and the blood inflow port may be oriented toward the center of the housing 2, for example.

Furthermore, it is preferable that the blood outflow ports 7a and 7b are provided substantially parallel to and in the opposite direction to the direction of the blood inflow port 6. This is because the blood inflow port does not get in the way when attaching a blood circuit, an artificial lung, etc. connected to the blood outflow port, and can be easily installed.

The heat exchange thin tubes 3 are metal tubes with high thermal conductivity (for example, stainless steel tubes, aluminum tubes, copper tubes), and have an inner diameter of 0.5 to 10 mm, preferably 1 to 5 mm, and are approximately 10 to 1000 tubes. Preferably, about 20 to 50 pieces are housed in the housing. And tubule 3
are housed in parallel to the axial direction of the housing 2, and as a result, blood flowing in from the blood inflow port flows across the thin tube 3. As shown in FIG. 2, the thin tubes 3 are spaced apart from adjacent thin tubes by a certain distance, and this distance varies depending on the outer diameter of the thin tube, the inner diameter of the housing, etc., but is preferably 0.5 to 10 mm, preferably 1 mm. ~5mm.

Further, in the vicinity of the blood inflow port in the housing 2, there is a space 20 in which the thin tube 3 does not exist. This space forms a blood chamber, and by providing this space 20, this space forms a part with low inflow resistance, so that the blood that has flowed into the housing 2 flows throughout this space 20. After forming a blood flow across the width of the capillary 3, it flows into the bundle of the capillaries 3. Therefore, blood flow can be formed over the entire length of the thin tube 3, and heat exchange efficiency can be improved.

Similarly, the housing 2 has a space 20 in the vicinity where the blood outflow port is located, in which the thin tube 3 does not exist. This space forms a blood chamber, and blood flowing inside the housing temporarily flows into this space and then sequentially flows out, so that it circulates within the housing.
The formation of blood streams that do not drain can be prevented.

In addition, the thin tubes are arranged in layers in the housing in parallel to the direction of the blood inflow port (arrow A) and the direction (arrow B) at a certain angle, as shown in Figure 2. The formed layer is provided so that the positions of the thin tubes are shifted from the upper and lower layers that are in contact with each other.
As a result, blood flowing from below passes between the tubules below, contacts the tubule above it, passes between the tubules, and repeats this process to flow upward. It's summery. The layers formed by the thin tubes 3 may be arranged, for example, substantially perpendicular to a line connecting the blood inflow port and the blood outflow port in the cross section of the housing.

Both ends of the heat exchange thin tube 3 are liquid-tightly fixed to the housing 2 by partition walls 4 and 5.
The partition walls 4 and 5 are made of a polymer potting agent (for example,
Polyurethane, silicone rubber), etc. are used. Then, the heat exchange thin tube 3 and the partition walls 4, 5
As a result, the inside of the cylindrical housing 2 is divided into a blood chamber 12 and a heat exchange medium chamber 13.

Further, a heat exchange medium introduction port 8 is integrally provided near one end of the side wall of the housing 2 beyond the partition wall 4, and near the other end of the side wall of the housing 2 beyond the partition wall 5. , a heat exchange medium discharge port 9 is integrally provided. The heat exchange medium introduction port 8 communicates with the inside of the heat exchange thin tube 3 via the medium inflow chamber 14 . Similarly, the heat exchange medium discharge port 9 communicates with the inside of the capillary tube 3 via the medium outflow chamber 15 .

As described above, since the medium introduction port is provided on the side wall of the housing 2, the inflow direction of the medium flowing from the medium introduction port is no longer parallel to the direction of the thin tube 3. It becomes more difficult to form a portion where the inflowing medium directly flows, and the medium flows into the entire capillary bundle. Furthermore, as shown in FIG. 1, the medium introduction port 8 is oriented in a direction facing the inner surface of the housing at a predetermined angle from the center of the housing, specifically, the medium introduction port 8 is oriented substantially parallel to a tangent to the outer surface of the housing. It is set up so that By doing so, the heat exchange medium can flow into the heat exchange medium inflow chamber 13 from the periphery of the chamber 13 as a rotating flow, thereby ensuring that the medium flows into the thin tube 3 at the periphery of the partition wall 4. can be done. and,
The medium discharge port 9 may also be installed at a predetermined angle toward the inner surface of the housing from the center of the housing, for example, the medium discharge port is approximately parallel to a tangent to the outer surface of the housing. It may be provided as follows.

A sealing member 10 is provided at one end of the housing 2, and a sealing member 11 is similarly provided at the other end of the housing 2 to liquid-tightly seal the end of the housing 2. are doing.

The sealing members 10 and 11 are made of, for example, polycarbonate, acrylic/styrene copolymer, acrylic/styrene copolymer, or acrylic/styrene copolymer.
The sealing member 10 is made of a butyl-styrene copolymer or the like and has a disc-shaped outer shape that is approximately the same as the inner surface shape of the end of the housing 2.
11 are liquid-tightly fixed to the ends of the housing 2 by adhesion using an adhesive or solvent, or fusion using high frequency, ultrasonic waves, induction heating, or the like.

Next, an embodiment of the blood heat exchanger of the present invention shown in FIG. 3 will be described.

The difference between what is shown in FIG. 3 and what is shown in FIGS. 1 and 2 lies in the structure of the partition walls 4, 5. Identical parts will be explained using the same numbers.

FIG. 4 is an enlarged sectional view of the partition wall portion of the heat exchanger of FIG. 3.

The substantially cylindrical housing 2 of the heat exchanger 1 accommodates a large number of heat exchange thin tubes 3 therein, and the cylindrical housing 2 and the thin tubes 3 are the same as those described above.

In this embodiment, the partition walls 4, 5 are formed by porous plates 40, 48 and potting agents 45, 46. To explain in detail using FIG. 4, the porous plate 40 has a large number of holes whose inner diameter at one end is larger than the outer diameter of the thin tube 3 and whose inner diameter at the other end is smaller than the outer diameter of the thin tube 3. In the one shown in FIG. 4, the porous plate 40 has a hole whose inner diameter becomes smaller than the outer diameter of the thin tube 3 from the middle of its wall thickness, and the end of the thin tube 3 is inserted into this hole. ing. Furthermore, the porous plate 40 has a plurality of (at least two) ribs 42 for separating the thin tube distribution plate 44 and the porous plate 40.
The thin tube distribution plate 44 is for forming a bundle shape of the thin tubes 3, and has a large number of holes into which the thin tubes 3 can be inserted. Although it is not necessary to provide the capillary distribution plate and the ribs, if they are provided, the capillaries 3 can be dispersed more uniformly. The porous plate 40 and the thin tube 3 are fixed in a liquid-tight manner by the potting agent 45, and the porous plate 40 and the housing 2 are also fixed in a liquid-tight manner. Further, the capillary dispersion plate 44 is embedded within the potting agent 45. By embedding it inside the potting agent 45 in this way, contact between the blood and the dispersion plate can be prevented, which is preferable. Further, the partition wall 5 side is also formed in the same manner.

Next, a method for manufacturing the blood heat exchanger of the present invention shown in FIG. 1 will be described with reference to FIG. 5.
FIG. 5 is a diagram showing one step of the method for manufacturing a heat exchanger of the present invention.

The manufacturing method of the present invention provides a substantially cylindrical shape having heat exchange medium ports 8 and 9 provided at both ends, and a blood inflow port 6 and blood outflow ports 7a and 7b located between the medium ports 8 and 9. Molding the housing 2, installing a first sealing member at a position between a medium port (for example, medium introduction port 8) and a blood port (for example, blood outflow port 7a) at one end of the cylindrical housing 2, A capillary dispersion device 61 having a large number of holes for inserting heat exchange capillaries 3 and a large number of heat exchange capillaries 3 are inserted into the cylindrical housing 2 from the other end of the cylindrical housing 2. A second sealing member is installed at a position between the medium port (for example, medium discharge port 9) and the blood port (for example, blood inflow port 6 or blood outflow port 7b) at the other end of 2, and the heat exchange With each end of the thin tube 3 closed, a blood port (e.g., blood outflow port 7a) at one end of the cylindrical housing 2 and a blood port (e.g.,
A potting agent is injected from the blood inflow port 6 or the blood outflow port 7b) to form partition walls 4 and 5 that fix both ends of the heat exchange thin tube 3 to the cylindrical housing 2, and to seal the first sealing member and the second sealing member. The method includes a step of removing the sealing member, and a step of attaching sealing members 10 and 11 to both ends of the cylindrical housing 2. Specifically, after the housing 2 is molded, a sealing member is attached at a position between one end of the housing 2 (for example, the medium introduction port 8 and the blood outflow port 7a) and at a position close to the medium port. Then, one end of the housing 2 is sealed. The first sealing member closes each end of the heat exchange thin tube 3 by being pressed between the second sealing members described later. The sealing member includes an elastic member 60 for sealing (for example, a rubber sheet such as a silicone rubber sheet, a polyurethane rubber sheet, or a latex rubber sheet) having the cross-sectional shape of the housing 2 at the above position, and the elastic member 60 for sealing. Assembly holder 70 to hold
It is preferable to consist of. Note that it is necessary to prevent the sealing elastic member 60 from adhering to the potting agent that will be injected into the housing 2 later. For example, the materials used for the potting agent and the elastic member for sealing do not have adhesive properties. If both materials have adhesive properties, the inner surface of the housing 2 of the sealing elastic member 60 is coated with a resin (for example, oil such as silicone oil) that reduces the adhesive properties of the two materials. There are many things that can be considered.
As shown in FIGS. 5 and 1, the diameter of the end of the housing 2 increases toward the end from a position closer to the media ports 8 and 9. As shown in FIGS. A sealing elastic member 60 is attached to this enlarged diameter portion 64 to seal the end of the housing 2. The movement of the sealing elastic member 60 is prevented by an assembly holder 70.

Thereafter, the housing 2 is erected with the side provided with the holder 70 facing downward, and the capillary dispersing device 61 is inserted into the housing 2. Capillary dispersion tool 61
is for forming a bundle shape of thin tubes 3, and has a large number of holes into which the thin tubes 3 can be inserted. In the one shown in FIG. 5, the capillary dispersing device 61 is
It consists of a plate 72 having a large number of holes formed in the same shape as the bundle of thin tubes 3, and a large number of pipes 74 whose ends are inserted into the respective holes of this plate 72. It is fixed. The inner diameter of the pipe 74 is slightly larger than the inner diameter of the thin tube 3, and has a diameter that allows the thin tube 3 to be inserted into the inside of the pipe 74. The outer diameter of the largest portion of the plate 72 is larger than the inner diameter of the intermediate portion of the housing 2 and smaller than the enlarged diameter portion 66, so that when inserted into the housing 2, the enlarged diameter portion will appear as shown in FIG. It is designed to hang at 66. The length of the pipe 74 is determined by the length of the blood outflow port 7 located below when the thin tube dispersion device 61 is inserted into the housing 2 (when suspended from the enlarged diameter portion 66 by the plate 72).
The length is adjusted so that it does not reach a. this is,
This is to prevent the pipe 74 of the capillary dispersion device 61 from becoming stuck due to the potting agent injected after the blood outflow port 7a. By using a capillary dispersing device using a pipe as described above, the capillary bundle can be reliably dispersed into a desired shape. In addition, by using a pipe, there are many contact areas between the thin tubes 3 and the thin tube dispersing device 61, and the dispersed state of the thin tubes 3 can be maintained reliably.
When the potting agent is injected, there is no risk that the dispersion state of the thin tubes 3 will be disturbed by the potting agent. After inserting the thin tube dispersing device 61, the thin tube 3 is inserted into the pipe 74 inserted into the hole in the plate 72 of the dispersing device 61. The lower end of the inserted thin tube 3 protrudes from the tip of the pipe 74,
The tip of the thin tube 3 comes into contact with the sealing elastic member 60. Further, the upper end of the thin tube 3 has a length so as to be near the enlarged diameter portion 65 of the housing 2. Then, the second sealing member is attached to the enlarged diameter portion 65 of the housing 2 from above to seal the other end of the housing 2. Like the first sealing member, the sealing member preferably includes a sealing elastic member 62 having the cross-sectional shape of the position housing 2, and an assembly holder 72 that holds the sealing elastic member 62. . As the sealing elastic member, those mentioned above can be suitably used. Then, by pressing the assembly holder 72 from above,
Each end of the thin tube 3 is closed by the sealing elastic members 60 and 62. In the above explanation, the case where the sealing elastic member 62 is provided has been explained, but it is sufficient that the end of the heat exchange thin tube 3 on the side to be fixed by the potting agent is closed, and it is not necessary to provide it at this point. Good too. After that, a potting agent is injected from the blood outflow port 7a and after solidifying, the upper assembly holder 72 and the sealing elastic member 6
2 and the capillary dispersion tool 61 are removed, and the sealing elastic member 62 is also attached to the expanded diameter portion 65 of the housing 2, the other end of the housing 2 is closed, and the sealing elastic member 62 is attached to the assembly holder 72. After holding the housing 2, the assembly holder 70 is pressed from above to close the end of the thin tube 3, and the blood outflow port 7b is opened in the same manner as above.
After injecting the potting agent through the blood inflow port 6 and solidifying it, the assembly holders 70 and 72 are attached to both ends of the housing 2.
By removing the sealing elastic members 60 and 62, the partition walls 4 and 5 are formed.

In the above method, since the method of removing the capillary dispersing device is used, the potting agent can be reliably and easily injected even on the side where the capillary dispersing device 61 is inserted. In addition, since both ends of the thin tube 3 are held by the sealing elastic members 60 and 62, even if there is a slight difference in length between the thin tubes 3, the sealing elastic members absorb it, so that there is no difference in the inside of the thin tube 3. Potting agent can be prevented from flowing in.

Sealing members 10 and 11 having the same cross-sectional shape as both ends of the housing 2 are liquid-tightly fixed to both ends of the housing 2. The sealing member can be fixed using adhesive, high frequency,
This is carried out by fusion using ultrasonic waves or induction heating.

In the above description, the sealing members include sealing elastic members 60, 62 and assembly holders 70, 7.
2 has been described, however, a sealing member in which the sealing elastic member and the assembly holder are integrally formed may also be used.

Then, the thin tube dispersion device having a large number of holes for inserting heat exchange thin tubes into the cylindrical housing 2 from the other end of the cylindrical housing 2 and the insertion of a large number of heat exchange thin tubes are inserted into the cylindrical housing 2 from the other end of the cylindrical housing 2. You can also go in the same state. It is preferable to insert the thin tube with the housing upright because it is easier to insert the tube. Also,
From the other end of the cylindrical housing 2
Insertion of a capillary dispersion device having a large number of holes for inserting heat exchange capillary tubes therein and a large number of heat exchange capillary tubes is performed, for example, with the capillary tube 3 inserted into the capillary dispersion device 61. It may also be inserted into the housing 2. The partition wall can be formed, for example, by centrifugally injecting a potting agent from the blood port at one end of the cylindrical housing 2 while rotating the housing 2 while holding each end of the heat exchange thin tube 3. Alternatively, the potting agent may be solidified by simultaneously centrifugally injecting the potting agent from the blood ports at both ends while rotating the housing at the center of the housing.

Further, sealing members 10 and 1 are provided at both ends of the housing 2.
1, for example, remove either the first sealing member or the second sealing member, attaching the sealing member to the removed end, and then attaching the other sealing member. The sealing member may be removed and a sealing member may be attached to the removed end.

In addition, in the above description, a method for removing the capillary dispersion tool has been described, but for example, the method for removing the capillary dispersion tool 61
However, even if it exists in the housing, it does not necessarily need to be removed as long as it does not pose a problem when using the heat exchanger. like that,
As the thin tube dispersing device 61, for example, a plate made of metal such as stainless steel, synthetic resin, etc. as shown in FIG. 6 can be considered. This thin tube dispersing device 61 has a plate portion having a large number of holes into which the thin tubes 3 can be inserted, and a plurality of (at least three) foot portions extending downward from the plate portion. Its sides are cut out to allow potting agent to migrate downward.
When the potting agent flows into the blood port using such a capillary dispersing device, the capillary dispersing device 61
Since it is buried in the partition wall 5 formed by the potting agent, there is no problem when using the heat exchanger.

[Specific Effects of the Invention] The effects of the blood heat exchanger of the present invention will be explained using the embodiment shown in FIG.

The heat exchanger of the present invention is installed in an extracorporeal circulation circuit, and blood flowing in from the blood inflow port 6 of the heat exchanger passes through the blood chamber 12 formed between the housing 2 and the heat exchange thin tube 3. Further, the heat exchange medium flows through the heat exchange thin tube 3 after flowing into the medium inflow chamber 14 from the medium introduction port 8 . In particular, since the medium introduction port 8 is integrally formed with the housing 2, the heat exchange medium does not flow out from between the partition wall 4 and the housing 2. Then, the blood comes into contact with the heat exchange thin tube 3 and is heated or cooled by the temperature of the medium flowing inside the thin tube. The medium flowing through the thin tube 3 flows into the medium effluent 15 and is discharged from the medium discharge port 9. Further, like the medium introduction port 8, the medium discharge port 9 is formed integrally with the housing 2, so that the heat exchange medium does not flow out from between the partition wall 5 and the housing 2. And tubule 3
The blood flowing outside the bundle is transferred to the blood outflow port 7a,
It flows out from 7b.

[Specific Effects of the Invention] The heat exchanger of the present invention has a heat exchange medium introduction port provided at one end, a heat exchange medium discharge port provided at the other end, the medium introduction port, and the medium discharge port. an integrally molded substantially cylindrical housing having a blood inflow port and a blood outflow port provided at a position between the two; a large number of heat exchange thin tubes housed within the substantially cylindrical housing; A blood chamber having both ends fluid-tightly fixed to the cylindrical housing and communicating with the blood outflow port and the blood inflow port within the housing, and a blood chamber formed by the tube body and communicating with the medium introduction port and the medium discharge port. comprising a partition wall dividing the housing into a heat exchange medium chamber, and a sealing member sealing both ends of the housing, and the medium introduction port is provided in a substantially tangential direction of the housing, In particular, since the medium introduction port and medium discharge port are integrally formed in the housing, the heat exchange medium introduction port and discharge port can be set in advance at any position on the housing where circuits etc. can be easily attached when the housing is formed. Furthermore, it is possible to reliably maintain the space between the housing and the partition wall that holds the capillary tube and the housing liquid-tight, and it is possible to prevent the heat exchange medium from flowing out between the partition wall and the housing. Furthermore, since the medium introduction port is provided on the side wall of the housing, the inflow direction of the medium flowing from the medium introduction port is no longer parallel to the direction of the capillary, so the medium flowing from the medium introduction port directly flows into a part of the capillary bundle. This makes it difficult to form a portion where the capillary bundle forms, allowing the medium to flow into the entire capillary bundle. Furthermore, since the medium introduction port is provided so as to be substantially parallel to the tangent to the outer surface of the housing, the heat exchange medium can flow into the heat exchange medium inlet chamber from the periphery as a rotating flow. Therefore, the medium can reliably flow into the thin tubes located at the periphery of the partition wall.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a blood heat exchanger according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line X-X of the blood heat exchanger shown in FIG. 1, and FIG. The figure is a sectional view showing a blood heat exchanger according to another embodiment of the present invention.
FIG. 4 is an enlarged sectional view showing the partition wall portion of the blood heat exchanger shown in FIG. 3, FIG. 5 is a diagram showing one step of an embodiment of the method for manufacturing a heat exchanger of the present invention, FIG. 6 is an enlarged sectional view showing a partition wall portion of another embodiment of the heat exchanger of the present invention, and FIG. 7 is a sectional view of a conventional heat exchanger. DESCRIPTION OF SYMBOLS 1... Blood heat exchanger, 2... Housing, 3... Heat exchange thin tube, 4... Partition wall, 5... Rib, 6... Blood inflow port, 7... Blood outflow port, 8... Heat exchange medium introduction port, 9... Heat exchange medium outlet port, 6
0, 62... Elastic member for sealing, 61... Capillary dispersing tool, 70, 72... Assembly holder.

Claims (1)

[Claims] 1. A heat exchange medium introduction port provided at one end, a heat exchange medium discharge port provided at the other end, and a heat exchange medium discharge port provided at a position between the medium introduction port and the medium discharge port. an integrally molded substantially cylindrical housing having a blood inflow port and a blood outflow port, a large number of heat exchange thin tubes housed within the substantially cylindrical housing, and both ends of the thin tubes attached to the cylindrical housing; A blood chamber that is fluid-tightly fixed and communicates with the blood outflow port and the blood inflow port in the housing, and a heat exchange medium chamber that communicates with the medium introduction port and the medium discharge port and is formed by the tube body. 1. A blood heat exchanger comprising a dividing partition wall and a sealing member sealing both ends of the housing, wherein the medium introduction port is provided in a substantially tangential direction of the housing. 2. The blood heat exchanger according to claim 1, wherein the housing has a space in the vicinity where the blood inflow port is located, in which the thin tube does not exist. 3. The blood heat exchanger according to claim 1 or 2, wherein the housing has a space in the vicinity where the blood outflow port is located, in which the thin tube does not exist. 4. The blood heat exchanger according to any one of claims 1 to 3, wherein the partition wall is formed of a potting agent. 5. According to any one of claims 1 to 3, the partition wall comprises a porous plate that grips the end of the thin tube, and a potting agent that liquid-tightly fixes the porous plate and the thin tube. The blood heat exchanger described. 6. According to claim 5, the porous plate has a large number of holes in which the inner diameter of one end is larger than the outer diameter of the thin tube and the inner diameter of the other end is smaller than the outer diameter of the thin tube. blood heat exchanger. 7. The blood heat exchanger according to any one of claims 1 to 6, wherein the medium discharge port is attached in a direction facing the inner surface of the housing at a predetermined angle from the center of the housing. vessel. 8. The blood heat exchanger according to claim 7, wherein the medium discharge port is attached substantially tangentially to the outer surface of the housing.