JPS6227354B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a heat exchanger using multiple tubes.

Conventionally, heat exchangers using a large number of metal tubes are known. This heat exchanger has an inlet and an outlet near both ends of the cylindrical body, and partition plates each having a large number of holes are provided at both ends. After inserting the tubes into a bundle, aligning both ends of the metal tubes, and attaching caps to both ends of the cylindrical body, molten polyurethane resin is injected into both ends to separate the partition plate and the metal tubes. The ends of the metal tubes are bonded to the partition plate, and the caps are then removed, and a cap having an inlet and a cap having an outlet separate from these caps are made into cylindrical bodies. Blood is allowed to flow through the metal tube through the inlet of one cap, and is then allowed to flow out from the outlet of the other cap. Cold water is allowed to flow in and circulate between the metal tubes, and is then allowed to flow out from the outlet of the cylindrical body.

However, for such a heat exchanger,
The method of gluing metal tubes to the partition plate is not only tedious but also time-consuming as it requires drilling a large number of holes in the partition plate and inserting metal tubes into each hole and gluing them. Since the adhesive is made of polyurethane resin, it is difficult to ensure this bonding.Furthermore, the polyurethane resin used for bonding passes between the partition plate and the metal tube, goes to the outside of the partition plate, that is, to the cap side, and is attached to the metal tube. There was a risk that the hole in the metal tube would be blocked at the end.

This invention was made in view of the above circumstances,
A synthetic resin tube of a predetermined length is fitted to both ends of each of a large number of tubes, leaving a predetermined length from one end surface, and the large number of tubes are temporarily bundled with a support plate or the like to form a synthetic resin tube and the synthetic resin. By injecting a synthetic resin material into the gap created in the portion of the pipe adjacent to the pipe and allowing it to solidify, the synthetic resin material and the synthetic resin pipe are cut at a position a predetermined distance apart from the end surface of the pipe. , a multi-tube that can be easily attached to a cylindrical body, reduce the number of steps involved, and ensure the attachment, and that is free from the risk of clogging the holes in the tube and synthetic resin tube. The purpose of the present invention is to provide a method for focusing tubes in a type heat exchanger.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the figure, 1 is a cylinder, and an inlet 2 and an outlet 3 are provided at both ends of the cylinder 1, respectively.
Also, on the outer periphery of both ends of the cylindrical body 1, male threaded portions 4, 4 are provided.
A large diameter portion 5 and a small diameter portion 6 are formed on the inner periphery of both ends of the cylindrical body 1 . In the figure, 7 is a support plate, and this support plate 7 has a polygonal (hexagonal in this embodiment) hole 8 in the center of the disk, and a plurality of holes (hexagonal in this example) along the outer circumference of the disk. In the example, 6
) 9 is opened. In the figure, 10 is a metal tube (outer diameter of about 2 mm) made of aluminum or stainless steel, and there are many metal tubes 10, 10...
...are all aligned to the same length. Also 1
1 is a synthetic resin pipe of a predetermined length made of vinyl chloride resin, and 12 is a synthetic resin material, that is, a polyurethane resin material, for hardening both ends of the metal pipe. Further, 13 is a cap, and this cap 13 is provided with an inlet 14. Inlet 1
A distributor 15 is fixed to the left side of 4 in FIG. As shown in the figure, this distributor 15 has four grooves 16 provided in the peripheral wall of a cylindrical body with a bottom. Further, a female threaded portion 17 is provided on the inner peripheral surface of the end portion of the cap 13. 18 is another cap, and this cap 18 is provided with an outlet 19 and an air vent 20. A small cap 21 is usually fitted into this air vent 20. Further, a female threaded portion 22 is provided on the inner peripheral surface of the end portion of the cap 18. Further, 23 is a sealing member. Then, on the outer periphery of both ends of each metal tube 10, 10, synthetic resin tubes 11, 11 of appropriate length (approximately 27 mm) are provided.
. . . with a predetermined length (approximately 20 mm) left from one end surface, and support plates 7, 7 are fitted into the large-diameter portions 5, 5 at both ends of the cylinder 1, respectively, in an opposed state. The synthetic resin pipe 1 is inserted into the holes 8, 8 of the support plates 7, 7.
A large number of metal tubes 10, 10... into which pipes 1, 11 are fitted.
. . . are inserted into a bundle to form synthetic resin pipes 11, 11 .
. . . are supported by support plates 7, 7. At this time, it is preferable that the end faces of the synthetic resin pipes 11, 11, . . . are substantially aligned. Next, the synthetic resin pipe 11,
As shown in FIG. 4, the caps 31, 31 are screwed onto both ends of the cylindrical body 1 so that the bottoms of the caps 31, 31, each having a cylindrical shape with a bottom, are in contact with the end surfaces of the caps 11, 11, and 11. Next, the cylinder 1 is rotated around the center of the cylinder 1 so that the central axis of the cylinder 1 rotates in a substantially horizontal plane, and while the cylinder 1 is rotating, the inlet 2 of the cylinder 1 is rotated. A suitable amount of molten polyurethane resin material 12 is injected from the outlet 3. At this time, this polyurethane resin material 12 reaches the vicinity of both ends of each metal tube 10, 10, etc. due to the centrifugal force caused by the rotation of the cylinder 1, and is further connected to the cap 31 through the holes 8, 9 of the support plate 7. It enters between the plate 7 and solidifies over time, solidifying both ends of each metal tube 10, 10, 11 parts of the synthetic resin pipe, and 7 parts of the support plate. After that, the caps 31, 31 are removed from the cylindrical body 1, and then the solidified polyurethane resin material 1 is removed.
2 and the ends of the synthetic resin pipes 11, 11...... are cut in a direction perpendicular to the central axis of the cylindrical body 1 at a position spaced a predetermined length outward from the end surface of the metal pipes 10, 10... . Next, caps 13 and 18 are screwed onto both ends of the cylindrical body 1, respectively.

Therefore, when using the heat exchanger having the above structure, the cap 18 of the cylinder 1 is placed on top of the cap 13.
is positioned at the bottom to allow blood to flow in from the inlet 14. Then, this blood is blocked and dispersed by the bottom and peripheral wall of the distributor 15, flows through the four grooves 16 into each of the metal tubes 10, 10, .
0, 10, . . . flows into the cap 18 and further flows out from the outlet 19. When this blood flows through each metal tube 10, the inlet port 2 of the cylinder body 1
Colder or warmer water (cold water for cooling the blood, warm water for heating the blood) is allowed to flow into the cylinder 1. This cold water or hot water passes between the metal tubes 10, 10, . . . in the cylindrical body 1 and flows out from the outlet 3. In this way, the blood flowing through each of the metal tubes 10, 10, .

As described above, in this embodiment, the synthetic resin tubes 11, 11, . Since the cutting is performed at the parts where the pipes 10 are not fitted, these parts are cut softly and cleanly, and there is no burr on the end faces of the metal pipes 10, 10... and the synthetic resin pipes 11, 11... These pores will not become occluded. In addition, the synthetic resin pipes 11, 11... have an appropriate wall thickness, and by simply fitting them into the holes 8 of the support plate 7 in a bundled state, an appropriate interval can be maintained between the metal pipes 10. Furthermore, each metal tube 1 is made of polyurethane resin material 12.
The vicinity of both ends of the cylindrical body 1, that is, both ends of the cylinder 1 can be easily solidified. Therefore, it is extremely easy to install the metal pipe 10 into the cylinder 1, and the caps 13, 18 for cold or hot water flowing into the cylinder 1 can be easily installed.
Intrusion into the sides is reliably prevented by the polyurethane resin material 12, 12.

In addition, in the above embodiment, the metal tubes 10, 10
Although the method of converging ...... has been described, the method is not limited to this, and instead of the metal tubes 10, 10 ^... A tube with a thin wall and a high strength can be used.

Further, according to the above embodiment, the blood flowing in from the inlet 14 is dispersed by the disperser 15, and thereby the flow velocity distribution of the blood flowing into each metal tube 10 is made uniform, so that each metal tube 10 is The flow rate of the circulating blood also becomes substantially uniform, and thereby blood at a substantially constant temperature can flow out from the outlet 3. Therefore, by providing the disperser 15, the heat exchange efficiency can be further improved compared to the case where the disperser 15 is not provided. Incidentally, FIG. 5 shows the difference in heat exchange efficiency between the case where the disperser 15 is provided in the cap 13 and the case where it is not provided. F in the diagram
represents the heat exchange efficiency calculated by the following formula. F=
Tbo-Tbi/Twi-Two, Tbo: Blood temperature at the outlet 19 (°C), Tbi: Blood temperature at the inlet 14 (°C), Twi: Cold water or hot water temperature at the inlet 2 (°C), Two: Outlet In addition, Vb in the figure indicates the blood volume l/min, and A in the figure indicates the temperature of the disperser 15 in the cap 13.
The figure shows the relationship between blood volume and heat exchange efficiency when warm water is allowed to flow in from the inlet 2 at a rate of 5/min in a state where no water is provided. In the figure, B and C indicate that hot water is supplied from the inlet 2 at 5/min, respectively, when the disperser 15 is installed in the cap 13.
The relationship between blood volume and heat exchange efficiency when flowing at 10/min is shown.

As explained above, according to the present invention, synthetic resin pipes of a predetermined length are fitted to both ends of each of a large number of pipes, leaving a predetermined length from one end surface, and the large number of pipes are connected by a support plate or the like. A synthetic resin material is injected into the gap created in the synthetic resin pipe and the part of the pipe adjacent to the synthetic resin pipe and solidified, and the synthetic resin material and the synthetic resin pipe are poured outward from the end surface of the pipe. Since the cutting is performed at positions spaced apart by a predetermined length, the tubes and synthetic resin tubes can be attached to the cylindrical body without burrs being formed on the end surfaces of the tubes or their holes being blocked. In addition, with this device, the tubes with synthetic resin tubes fitted at both ends are simply bundled together using a support plate, etc., and an appropriate distance is maintained between each tube, so there is no need to insert the tubes through the partition plates one by one. Therefore, it is extremely easy to attach the tube to the cylindrical body, reducing the number of steps required for attaching the tube, and the synthetic resin material reliably enters between each tube. Therefore, the arrangement of the tube to the cylinder can be ensured.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing one embodiment of the present invention, Fig. 2 is a transverse side view taken along the - line in Fig. 1, Fig. 3 is an enlarged sectional view of the circular part of Fig. 1, and Fig. 4 is FIG. 5 is a sectional view showing one step of the present invention, and is a diagram showing the relationship between heat exchange efficiency and blood flow rate, showing the difference in heat exchange efficiency between a case where a disperser is provided and a case where a disperser is not provided. . 1... Cylindrical body, 7... Support plate, 10... Metal tube,
11...Synthetic resin pipe (vinyl resin pipe), 12...
...Polyurethane resin material (synthetic resin material), 1
3,18...cap.

Claims (1)

[Claims] 1. A process of fitting a synthetic resin pipe to the end of a pipe made of a material having appropriate strength, leaving a predetermined length from one end surface of the synthetic resin pipe, and a process of fitting a synthetic resin pipe to the end of the pipe, and a process of fitting the synthetic resin pipe to the end of the pipe, and A step of temporarily converging the tubes with a support plate, etc., and a step of injecting and solidifying a synthetic resin material into the gap created in the synthetic resin tube of the tube temporarily condensed in this step and the part of the tube adjacent to this synthetic resin tube. and a step of cutting the synthetic resin material and the synthetic resin tube at a position spaced an appropriate length outward from the end surface of the tube. .