JP2006207937A - Heat exchanger, and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive and highly reliable heat exchanger with structure very easy to manufacture while maintaining very superior heat exchange performance. <P>SOLUTION: In the heat exchanger, tube group blocks 30 composed of a plurality of base materials 20 provided with a multiplicity of through holes, and a plurality of tubes 10 provided between the base materials 20 with interiors communicated with the through holes are plurally connected in a tube axis direction. Since the tube group blocks 30 are connected to provide a predetermined size, a tube length of the tube group block 30 can be short, and the base material 20 and the tube 10 can be easily manufactured at the same time by injection molding, die-casting, or the like. Since a process of inserting and bonding the tube 10 is eliminated, the heat exchanger can be provided inexpensively. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat exchanger for a cooling system, a heat dissipation system, a heating system, and the like, and more particularly to a liquid and gas heat exchanger used in a system that requires compactness such as information equipment and a method for manufacturing the same. is there.

  Conventionally, this type of heat exchanger is generally composed of tubes and fins. However, in recent years, in order to achieve compactness, the tube diameter and tube pitch are reduced, and the tubes are made dense. It tends to become. As an extreme form thereof, there is one in which the heat exchanging portion is composed only of a very thin tube having a tube outer diameter of about 0.5 mm (for example, see Patent Document 1).

  FIG. 15 is a front view of a conventional heat exchanger described in Patent Document 1. FIG.

  As shown in FIG. 15, the conventional heat exchanger includes an inlet tank 1 and an outlet tank 2 which are arranged to face each other at a predetermined interval, and a plurality of tubes 3 having a circular cross section between the inlet tank 1 and the outlet tank 2. Is arranged, and a core portion 4 is formed through which an external fluid flows through the outside of the tube 3. Water or antifreeze is mainly used as an internal fluid that circulates in the pipe 3, and air is mainly used as an external fluid, and each circulates and performs heat exchange.

And while arrange | positioning the pipe | tube 3 in grid shape, the outer diameter of the pipe | tube 3 shall be 0.2 mm or more and 0.8 mm or less, and the value which remove | divided the pitch of the adjacent pipe | tube 3 by the pipe outer diameter is 0.5 or more. By setting it to 5 or less, it is said that the amount of heat exchange for the power used can be greatly improved.
JP 2001-116481 A

  Although the specific elements and manufacturing method constituting the conventional heat exchanger are not shown, in general, a large number of thin tubes 3 and a large number of fine circular holes on a specific surface are previously opened. There is a method in which the tank 1 and the outlet tank 2 are prepared, both ends of the pipe 3 are inserted into the circular holes of the inlet tank 1 and the outlet tank 2, and the insertion portion of the pipe 3 is bonded to the inlet tank 1 and the outlet tank 2 by welding or the like. Conceivable. However, the long and thin pipe 3 is not only very expensive, but a very small number of holes for inserting the pipes 3 are provided in the inlet tank 1 and the outlet tank 2 at a predetermined fine pitch. The process of inserting and bonding the tube 3 into the inlet tank 1 and the outlet tank 2 is very difficult, and even if the heat exchange performance is high, there is a problem that it is very expensive and has low reliability against leakage. It was.

  The present invention solves the above-described conventional problems, and provides an inexpensive and highly reliable heat exchanger having a structure that is extremely easy to manufacture while maintaining extremely excellent heat exchange performance. With the goal.

  In order to solve the above-described conventional problems, the heat exchanger according to the present invention includes a plurality of substrates having a plurality of through holes and a plurality of tubes in which the inside of the tube communicates with the through holes and is provided between the substrates. A plurality of tube group blocks are connected in the tube axis direction.

  Thereby, in order to connect the tube group block to a predetermined size, the tube length of the tube group block may be shortened, and the substrate and the tube can be easily manufactured simultaneously by injection molding or die casting, Since the process of inserting and bonding the tube is eliminated, a heat exchanger can be provided at low cost.

  The heat exchanger of the present invention is characterized in that the circumferences of the adjacent substrates are joined to each other and the tube group blocks are connected.

  As a result, when connecting the tube group blocks, the circumferences that are easy to operate from outside are joined, so that the number of man-hours can be reduced, the reliability of joining is improved, and a heat exchanger can be provided at low cost.

  Further, the pipe is a multi-hole pipe having a plurality of flow paths in the pipe.

  Thereby, since the number of tubes can be reduced without reducing the number of flow paths, it can be easily manufactured and a heat exchanger can be provided at low cost.

  In the heat exchanger of the present invention, the tube group block is made of a resin material.

  Thereby, a heat exchanger can be provided inexpensively by using an inexpensive resin material.

  Moreover, the heat exchanger of this invention joins the circumference | surroundings of the said board | substrate directly and connected the tube group block.

  As a result, the brazing material does not elute and the tube is not clogged, defective products can be greatly reduced, and a heat exchanger can be provided at low cost.

  Further, the present invention is characterized in that the substrates are joined together by welding.

  As a result, the brazing material does not elute to melt and bond the substrate itself, and the flow path in the tube is not clogged.

  In the heat exchanger according to the present invention, the circumferences of the substrates are joined by ultrasonic joining.

  Thereby, since ultrasonic welding heats and melt-bonds only the joining portion, the base material is not eluted and the tube is not clogged.

  The heat exchanger of the present invention is characterized in that the substrates are joined together by diffusion bonding.

  Thereby, since the diffusion bonding does not melt the base material, the flow path in the tube is not clogged.

  Since the heat exchanger of the present invention connects the tube group blocks to a predetermined size, the tube length of the tube group blocks may be shortened, and the substrate and the tube can be easily manufactured simultaneously by injection molding or die casting. This eliminates the step of inserting and bonding the tube, so that the heat exchanger can be provided at low cost.

  In addition, when connecting the tube group blocks, the heat exchanger of the present invention joins the circumferences that are easy to operate from the outside, reducing man-hours and improving the reliability of joining, and providing a heat exchanger at low cost. can do.

  Further, the heat exchanger of the present invention does not clog the tube due to the elution of the brazing material, can greatly reduce defective products, and can provide a heat exchanger at low cost.

  According to the first aspect of the present invention, a tube group block including a plurality of substrates having a plurality of through holes and a plurality of tubes in which the inside of the tube communicates with the through holes and is provided between the substrates is arranged in the tube axis direction. It is a heat exchanger that connects multiple tube groups, and the tube group blocks are connected to a predetermined size. Therefore, the tube length of the tube group block may be shortened, and the substrate and the tube can be easily and simultaneously formed by injection molding or die casting. Since it can be manufactured and the process of inserting and bonding the tube is eliminated, a heat exchanger can be provided at low cost.

  Invention of Claim 2 joins the circumference | surroundings of the board | substrate of the heat exchanger of invention of Claim 1 mutually, and when connecting a tube group block, the circumference which is easy to operate from the outside. Since it joins, a man-hour can be reduced, the reliability of joining improves, and a heat exchanger can be provided at low cost.

  The invention described in claim 3 is a multi-hole tube having a plurality of channels in the tube of the heat exchanger according to claim 1 or 2, wherein the number of channels is Since the number of tubes can be reduced without reduction, it can be easily manufactured and a heat exchanger can be provided at low cost.

  The invention according to claim 4 is characterized in that the tube group block of the heat exchanger according to any one of claims 1 to 3 is a resin material, and an inexpensive resin material is provided. By using it, a heat exchanger can be provided at low cost.

  The invention described in claim 5 is a manufacturing method in which the circumferences of the substrates of the heat exchanger according to any one of claims 2 to 4 are directly joined to each other and the tube group blocks are connected to each other. The material does not elute and clog the tube, so that defective products can be greatly reduced, and a heat exchanger can be provided at low cost.

  The invention according to claim 6 is a manufacturing method in which the heat exchanger of the invention according to claim 5 is welded and bonded together on the circumference of the substrate, and the brazing material is eluted to melt and bond the substrate itself. Therefore, the flow path in the pipe is not clogged.

  The invention according to claim 7 is a manufacturing method in which the heat exchanger of the invention according to claim 5 is ultrasonically bonded to each other on the circumference of the substrate, and ultrasonic welding is performed by heating only the bonded portion and melt-bonding. Therefore, the base material does not elute and the tube is not clogged.

  The invention described in claim 8 is a manufacturing method in which the heat exchanger of the invention described in claim 5 is diffusion-bonded to each other on the circumference of the substrate, and the base material is not melted, so that the flow path in the tube is clogged. There is no.

(Embodiment 1)
1 is a front view of a heat exchanger according to Embodiment 1 of the present invention, FIG. 2 is a side view of the heat exchanger of the same embodiment, FIG. 3 is a cross-sectional view taken along line AA in FIG. FIG. 2 is a sectional view taken along line BB in FIG.

  1 to 4, the heat exchanger includes a tube group block 30 composed of a tube 10 and a substrate 20 joined to each other on the circumference 40 of the substrate 20 in the tube axis direction of the tube 10 and connected in two stages, and inlet headers at both ends 50 and the outlet header 60 are installed. In the present embodiment, the tube 10 is a circular tube and is provided with one internal fluid flow path. Note that the shape of the tube 10 may not be a circular tube, and may be, for example, a rectangular tube, a polygonal tube, or an elliptical tube. Further, the circumferences 40 of the substrates 20 are directly joined without using a brazing material or an adhesive. Examples of the bonding method include welding bonding, ultrasonic bonding, and diffusion bonding. By directly joining the circumferences 40 of the substrates 20 in this way, the brazing material and the adhesive are not eluted and the tube 10 is not clogged. In this embodiment, diffusion bonding is used. In diffusion bonding, atomic diffusion (interdiffusion) occurs when heating and pressurizing to a temperature at which the substrate does not melt at the same time, and bonding is performed by linking the atoms. The inside of 10 is not clogged. By joining by diffusion joining without using a brazing material in this way, it is possible to suppress the occurrence of defective products such as clogging in the tube 10 as much as possible, and to provide a heat exchanger at a low cost.

  5 to 7 are views for explaining the tube group block 30, FIG. 5 is a perspective view of the tube group block of the heat exchanger of the embodiment, and FIG. 6 is a view of the heat exchanger of the embodiment. FIG. 7 is a front view of the tube group block, and FIG. 7 is a top view of the tube group block of the heat exchanger according to the embodiment.

  In the tube group block 30, the tube 10 and the substrate 20 are integrally formed by injection molding or the like. The material of the tube group block 30 is preferably a resin material that is inexpensive and easy to mold. In particular, in the case of manufacturing by injection molding, a material having a small viscosity and good fluidity is preferable from the viewpoint of a complicated shape due to a small diameter and a large number of the tubes 10 and supplying a resin to the end. By using such a material, the number of defective products can be reduced, and a heat exchanger can be provided at low cost. In addition, when water or antifreeze is used for the internal fluid, if a resin material having a low vapor permeability is used, the internal fluid is difficult to permeate, so that the wall thickness of the tube 10 can be reduced, and the material cost can be reduced. A heat exchanger can be provided. For these reasons, it is optimal to use polypropylene (PP) or polyethylene terephthalate (PET) which has good fluidity, low vapor permeability and is inexpensive.

  In the present embodiment, the tubes 10 are arranged in a grid pattern, but may be a staggered pattern.

  About the heat exchanger comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The internal fluid flows into the inlet header 50, is divided into the pipes 10, passes through the tube group block 30, and flows out of the heat exchanger from the outlet header 60. On the other hand, outside the tube 10, an external fluid flows between the tubes 10, and the internal fluid and the external fluid exchange heat through the tube 10.

  In the present embodiment, the tube group blocks 30 are stacked in two stages, but may be a plurality of stages of two or more stages.

  As described above, in the present embodiment, since the tube group block 30 is connected to have a predetermined size, the length of the tube 10 of the tube group block 30 may be shortened, and can be easily achieved by injection molding or die casting. Since the substrate 20 and the tube 10 can be manufactured at the same time, and the process of inserting and bonding the tube 10 is eliminated, a heat exchanger can be provided at low cost.

  In the present embodiment, the circumference 40 of the substrate 20 is joined to each other. When the tube group block 30 is connected, the circumference 40 that is easy to operate from outside is joined, so that the number of man-hours can be reduced. The reliability of joining is improved and a heat exchanger can be provided at low cost.

  In the present embodiment, since the tube group block 30 is made of an inexpensive resin material, a heat exchanger can be provided at a low cost.

  Further, in the present embodiment, by directly joining the circumferences 40 of the substrates 20 by diffusion bonding, the base material can be bonded without melting using a brazing material or an adhesive, and the flow path in the tube 10 is clogged. Therefore, defective products can be greatly reduced, and a heat exchanger can be provided at low cost.

(Embodiment 2)
8 is a front view of a heat exchanger according to Embodiment 2 of the present invention, FIG. 9 is a side view of the heat exchanger of the same embodiment, FIG. 10 is a cross-sectional view taken along the line CC of FIG. FIG. 9 is a sectional view taken along line DD in FIG.

  8 to 11, in the heat exchanger, a tube group block 130 composed of a tube 110 and a substrate 120 is joined to each other on the circumference 140 of the substrate 120 in the tube axis direction of the tube 110 and connected in two stages, and inlet headers are provided at both ends. 150 and an outlet header 160 are installed. In the present embodiment, the tube 110 has a flat cross-sectional shape, and a plurality of flow paths 115 are arranged in the long side direction. The tubes 110 are installed on the substrate 120 at intervals so that the long side directions are parallel to each other. Further, the circumferences 140 of the substrates 120 are directly joined without using a brazing material or an adhesive. Examples of the bonding method include welding bonding, ultrasonic bonding, and diffusion bonding. By directly joining the circumferences 140 of the substrates 120 in this way, the brazing material and the adhesive are not eluted and the tube 110 is not clogged. In this embodiment, diffusion bonding is used. In diffusion bonding, atomic diffusion (interdiffusion) occurs when heating and pressurizing to a temperature at which the base material does not melt at the same time, and bonding is performed by combining the atoms. The inside of 110 is not clogged. Thus, by joining by diffusion joining without using a brazing material, it is possible to suppress the generation of defective products such as clogging in the tube 110 as much as possible, and to provide a heat exchanger at low cost.

  12 to 14 are views for explaining the tube group block 130. FIG. 12 is a perspective view of the tube group block of the heat exchanger according to the embodiment. FIG. 13 is a perspective view of the heat exchanger according to the embodiment. FIG. 14 is a front view of the tube group block, and FIG. 14 is a top view of the tube group block of the heat exchanger according to the embodiment.

  In the tube group block 130, the tube 110 and the substrate 120 are integrally formed by injection molding or the like. The material of the tube group block 130 is preferably a resin material that is inexpensive and has good fluidity. By using such a material, the number of defective products can be reduced, and a heat exchanger can be provided at low cost. In addition, when water or antifreeze is used for the internal fluid, if a resin material having a low vapor permeability is used, the internal fluid is difficult to permeate. Therefore, the wall thickness of the tube 110 can be reduced, and the material cost can be reduced. A heat exchanger can be provided. For these reasons, it is optimal to use polypropylene (PP) or polyethylene terephthalate (PET) which has good fluidity, low vapor permeability and is inexpensive.

  About the heat exchanger comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The internal fluid flows into the inlet header 150, is divided into each of the tubes 110, passes through the tube group block 130, and flows out of the heat exchanger through the outlet header 160. On the other hand, outside the pipe 110, the external fluid flows between the pipes 110, and the internal fluid and the external fluid exchange heat through the pipe 110.

  In the present embodiment, the tube group blocks 130 are stacked in two stages, but may be a plurality of stages of two or more stages.

  As described above, in the present embodiment, since the tube group block 130 is connected to have a predetermined size, the length of the tube 110 of the tube group block 130 may be shortened, and can be easily achieved by injection molding or die casting. In addition, since the substrate 120 and the tube 110 can be manufactured at the same time, and the process of inserting and bonding the tube 110 is eliminated, a heat exchanger can be provided at low cost.

  In the present embodiment, the circumference 140 of the substrate 120 is joined to each other. When the tube group block 130 is connected, the circumference 140 that is easy to operate from outside is joined, so that the number of man-hours can be reduced. The reliability of joining is improved and a heat exchanger can be provided at low cost.

  In the present embodiment, the pipe 110 is a multi-hole pipe having a plurality of flow paths 115 in the pipe, and the number of pipes can be reduced without reducing the number of flow paths. A heat exchanger can be provided.

  In the present embodiment, since the tube group block 130 is made of an inexpensive resin material, a heat exchanger can be provided at a low cost.

  Further, in this embodiment, by directly joining the circumferences 140 of the substrates 120 by diffusion bonding, the base material can be bonded without using a brazing material or an adhesive, and the flow path 115 in the tube 110 is clogged. Therefore, defective products can be greatly reduced, and a heat exchanger can be provided at low cost.

  As described above, the heat exchanger according to the present invention can be realized at low cost while maintaining very excellent heat exchange performance, such as heat exchangers for refrigeration equipment and air conditioning equipment, waste heat recovery equipment, etc. It can also be applied to applications.

The front view of the heat exchanger in Embodiment 1 of this invention Side view of the heat exchanger of the same embodiment AA line sectional view of the heat exchanger of FIG. BB sectional view of the heat exchanger of FIG. The perspective view of the tube group block of the heat exchanger of the embodiment Front view of tube group block of heat exchanger of same embodiment Top view of tube group block of heat exchanger of same embodiment Front view of heat exchanger according to Embodiment 2 of the present invention Side view of the heat exchanger of the same embodiment CC sectional view of the heat exchanger of FIG. DD sectional view of the heat exchanger of FIG. The perspective view of the tube group block of the heat exchanger of the embodiment Front view of tube group block of heat exchanger of same embodiment Top view of tube group block of heat exchanger of same embodiment Front view of conventional heat exchanger

Explanation of symbols

10, 110 tube 20, 120 substrate 30, 130 tube group block 40, 140 circumference 115 flow path

Claims (8)

  A heat exchanger in which a plurality of substrate groups each having a plurality of through holes and a plurality of tube group blocks each including a plurality of tubes that communicate with the through holes and are provided between the substrates are connected in the tube axis direction.   The heat exchanger according to claim 1, wherein the circumferences of adjacent substrates are joined to each other and the tube group blocks are connected.   The heat exchanger according to claim 1 or 2, wherein the pipe is a multi-hole pipe having a plurality of flow paths in the pipe.   The heat exchanger according to any one of claims 1 to 3, wherein the tube group block is made of a resin material.   The manufacturing method of the heat exchanger as described in any one of Claim 2 to 4 which joined the tube group block by mutually joining the circumference | surroundings of the said board | substrate directly.   6. The method of manufacturing a heat exchanger according to claim 5, wherein the circumferences of the substrates are joined together by welding.   The method for manufacturing a heat exchanger according to claim 5, wherein the circumferences of the substrates are bonded to each other by ultrasonic bonding.   6. The method of manufacturing a heat exchanger according to claim 5, wherein the circumferences of the substrates are bonded to each other by diffusion bonding.

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