JP2006078063A - Heat exchanger and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive and reliable heat exchanger with a structure extremely easy to manufacture while keeping excellent heat exchanging performance. <P>SOLUTION: This heat exchanger comprises a plurality of tube group plates 3 each formed of a substrate 5 having a number of through-holes 4 and a plurality of tubes 6 provided substantially vertically from the surface of the substrate 5 so that the inner parts thereof communicate with the through-holes 4, each of the tube group plates 3 being laminated so that the through-holes 4 on the back surface of the substrate 6 communicate with the tubes 6 of the adjacent tube group plate 3. Since the heat exchanger can be easily constituted by laminating the tube group plates 3, the heat exchanger can be manufactured in an extremely inexpensive and easy process without needing use of long and narrow tubes or arrangement of the tubes. <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. 8 is a front view of a conventional heat exchanger described in Patent Document 1. FIG.

  As shown in FIG. 8, the conventional heat exchanger includes an inlet tank 31 and an outlet tank 32 that are arranged to face each other at a predetermined interval, and a plurality of pipes 33 having an annular cross section between the inlet tank 31 and the outlet tank 32. Is arranged, and a core part 34 through which an external fluid flows through the outside of the pipe 33 is configured.

And while arrange | positioning the pipe | tube 33 in square grid shape, the outer diameter of the pipe | tube 33 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 33 by the pipe outer diameter is 0.5 or more. By setting it to 3.5 or less, it is said that the amount of heat exchange for the power used can be greatly improved.
JP 2001-116481 A

  Although specific elements and manufacturing methods constituting the conventional heat exchanger are not shown, in general, a large number of thin tubes 33 and a large number of fine holes on a specific surface are previously opened. There is a method in which a tank 31 and an outlet tank 32 are prepared, both ends of the pipe 33 are inserted into the circular holes of the inlet tank 31 and the outlet tank 32, and the insertion portion of the pipe 33 is bonded to the inlet tank 31 and the outlet tank 32 by welding or the like. Conceivable. However, the long and thin tube 33 is not only very expensive, but a very large number of holes for inserting the tube 33 in the inlet tank 31 and the outlet tank 32 are provided at a predetermined minute pitch. The process of inserting and bonding the pipe 33 into the inlet tank 31 and the outlet tank 32 is very difficult, and even if the heat exchange performance is high, the problem is that it is very expensive and has low reliability against leakage of the joint. Had.

  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, a heat exchanger according to the present invention includes a substrate having a large number of through holes and a plurality of tubes in which the inside of the tube communicates with the through holes and is substantially perpendicular to the surface of the substrate. A plurality of tube group plates are provided, and the tube group plates are laminated so that the through holes on the back surface of the substrate communicate with the tubes of the adjacent tube group plates.

  With this configuration, the heat exchanger can be easily configured by stacking the tube group plates, so that it is not necessary to use long and thin tubes, and it is not necessary to arrange the tubes at the same time.

  Further, in the present invention, the outer diameter of the tube tip is made smaller than the inner diameter of the through hole, and the tube tip of the adjacent tube group plate is inserted into the through hole.

  With such a configuration, it is possible to reliably connect the tubes by providing an insertion allowance for the tubes.

  In the present invention, the through hole in the back surface of the substrate is provided with a recess having an inner diameter equal to or greater than the outer diameter of the tube tip, and the tube tip of the tube group plate adjacent to the recess is inserted. is there.

  With this configuration, the length of insertion into the through hole of the tube can be defined.

  According to the present invention, a header having a space inside is provided on both outer sides of the tube group plate laminated, and the substrates at both ends constitute a part of the header.

  With this configuration, since the header can be configured using the tube group plate, there is no need to provide a hole for inserting a tube in the header or to insert and bond the tube into the header.

  In the present invention, the plane direction of the substrate is arranged in the direction of gravity.

  With this configuration, it is possible to prevent dust accumulation and dew condensation on the substrate.

  Moreover, this invention makes the protrusion length of the said pipe | tube in the said space of the said header non-uniform | heterogenous.

  With such a configuration, the flow rate ratio of the fluid flowing in the pipe can be adjusted.

  In the present invention, the tube group plate is formed by injection molding or press molding.

  With this configuration, the tube group plate can be processed quickly in large quantities with the same shape.

  According to the present invention, the back surface of the tube group plate adjacent to the tip of the tube is joined by welding or diffusion bonding.

  Such a manufacturing method does not use a different material such as a brazing material or an adhesive, so that precipitation of impurities can be prevented.

  The heat exchanger of the present invention does not need to use long and thin tubes, and does not need to arrange the tubes at the same time. Therefore, the heat exchanger can be manufactured at a very low cost and with a simple process.

  Moreover, since the heat exchanger of this invention can ensure the connection between pipes by providing the insertion allowance of a pipe | tube, it can ensure the reliability with respect to a leak.

  Moreover, since the heat exchanger of this invention can prescribe | regulate the insertion length to the through-hole of a pipe | tube, it can suppress the curvature and distortion of a heat exchanger.

  In addition, the heat exchanger of the present invention does not need to be provided with a hole for inserting a pipe in the header or to insert and bond the pipe into the header, so that it can be manufactured with a small number of processes and has reliability against leakage in the header. Can be secured.

  Moreover, since the heat exchanger of the present invention can suppress the accumulation of dust and the retention of condensed water on the substrate, an increase in the flow resistance of the fluid flowing outside the tube can be suppressed.

  Moreover, since the heat exchanger of the present invention can adjust the flow rate ratio of the fluid flowing in the pipe, the heat exchange amount distribution can be optimized according to the velocity distribution and temperature distribution of the fluid flowing outside the pipe. .

  Moreover, since the manufacturing method of the heat exchanger of this invention can process a tube group board rapidly in large quantities with the same shape, quality is stabilized and processing cost can be held down.

  Moreover, since the manufacturing method of the heat exchanger of this invention does not use dissimilar materials, such as a brazing material and an adhesive agent, precipitation of an impurity etc. can be prevented and safety | security can be improved.

  The invention according to claim 1 includes a plurality of tube group plates each including a substrate 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 substantially perpendicularly from the surface of the substrate. A heat exchanger in which the tube group plates are laminated so that the pipes in the tube group plate adjacent to the through hole on the back surface of the substrate communicate with each other, and the heat exchanger is formed by laminating the tube group plates. Since it is easy to configure, it is not necessary to use long and thin tubes, and at the same time, it is not necessary to arrange the tubes at the same time, so that the heat exchanger can be manufactured at a very low cost and in a simple process.

  According to a second aspect of the present invention, in the heat exchanger according to the first aspect of the present invention, the outer diameter of the tip of the tube is made smaller than the inner diameter of the through hole, and the tube of the adjacent tube group plate is used. The tip of the tube is inserted into the through hole, and by providing the insertion allowance for the tube, the tubes can be reliably connected to each other, so that reliability against leakage can be ensured.

  The invention according to claim 3 is the heat exchanger according to claim 1 or 2, wherein the through hole on the back surface of the substrate is provided with a recess having an inner diameter equal to or greater than the outer diameter of the tip of the tube. The tip of the tube of the tube group plate adjacent to the recess is inserted, and the insertion length into the through hole of the tube can be defined, so that warpage and distortion of the heat exchanger can be suppressed. .

  According to a fourth aspect of the present invention, in the heat exchanger according to any one of the first to third aspects of the present invention, the heat exchanger according to any one of the first to third aspects is provided on both outer sides of the tube group plate in which headers having a space are stacked. The substrate of the above is a part of the header, and it is not necessary to provide a hole for inserting a pipe in the header or to insert and bond a pipe to the header. It is possible to ensure reliability against leakage in the market.

  According to a fifth aspect of the present invention, in the heat exchanger according to any one of the first to fourth aspects, the plane direction of the substrate is arranged in the direction of gravity, and dust is deposited on the substrate. And the retention of condensed water can be suppressed, so that an increase in the flow resistance of the fluid flowing outside the pipe can be suppressed.

  A sixth aspect of the present invention is the heat exchanger according to the fourth aspect of the present invention, wherein the protruding length of the pipe in the space of the header is made non-uniform, and the flow rate of the fluid flowing in the pipe Since the ratio can be adjusted, the heat exchange amount distribution can be optimized according to the velocity distribution and temperature distribution of the fluid flowing outside the pipe.

  The invention according to claim 7 is the method of manufacturing a heat exchanger according to any one of claims 1 to 6, wherein the tube group plate is formed by injection molding or press molding, Since the group plates can be processed in large quantities and quickly in the same shape, the quality is stable and the processing cost is reduced.

  The invention according to claim 8 is the method of manufacturing a heat exchanger according to any one of claims 1 to 6, wherein the back surface of the tube group plate adjacent to the tip of the tube is welded or diffusion bonded. Since different materials such as brazing material and adhesive are not used, precipitation of impurities and the like can be prevented, and safety can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a front view of a heat exchanger according to a first embodiment of the present invention, FIG. 2 is a top view of the heat exchanger according to the first embodiment, FIG. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 5 is a front view of the tube group plate of the heat exchanger of the same embodiment, FIG. 6 is a side view of the tube group plate of the heat exchanger of the same embodiment, and FIG. 7 is the same embodiment. It is the elements on larger scale of the heat exchanger.

  1 to 7, the heat exchanger includes a heat exchanging unit 1 and headers 2 a and 2 b at both ends of the heat exchanging unit 1. The heat exchanging unit 1 is configured by laminating a plurality of tube group plates 3 in the horizontal direction so that the plane direction of the substrate 5 is the direction of gravity. The tube group plate 3 includes a substrate 5 having a large number of through holes 4 and a plurality of tubes 6 in which the inside of the tube communicates with the through holes 4 and is provided vertically from the surface of the substrate 5. 4 is provided with a recess 7 having an inner diameter that is slightly larger than the outer diameter of the end of the tube 6. Then, as shown in FIG. 7, by inserting the tip of the tube 6 of the tube group plate 3 adjacent to the recess 7, the through hole 4 on the back surface of the substrate 5 and the tube 6 of the adjacent tube group plate 3 communicate with each other. It is laminated so that. The header 2a includes a space 8a and an inflow pipe 9 inside, and the substrate 5a of the adjacent tube group plate 3a constitutes a part of the header 2a, and the tube 6a of the tube group plate 3a is separated from the inflow tube 9. The protruding length into the space 8a is large. The header 2b includes a space 8b and an outflow pipe 10 inside, and the substrate 5b of the adjacent tube group plate 3b constitutes a part of the header 2b.

  In the heat exchanger configured as described above, the fluid A flowing in the pipe 6 and the fluid B flowing outside the pipe 6 exchange heat through the pipe 6. Specific examples of the fluid A include water and refrigerant, and specific examples of the fluid B include air and gas. Further, the fluid A flows from the inflow pipe 9 into the space 8a of the header 2a, and flows through the plurality of pipes 6 connected to the space 8a. The fluid A flowing inside the pipe 6 joins in the space 8b of the header 2b and then flows out from the outflow pipe 10. At this time, in this heat exchanger, the tube group plate 3 having the tubes 6 is laminated to form the tube group-like heat exchange section 1, so that very thin tubes can be arranged at a very high density. Since the heat transfer area of the pipe 6 in contact with the fluid A and the fluid B can be made very large, a very high capacity and compact heat exchanger can be realized.

  As described above, in the present embodiment, the substrate 5 having a large number of through holes 4 and a plurality of tubes 6 in which the inside of the tube communicates with the through holes 4 and is provided substantially perpendicularly from the surface of the substrate 5. A plurality of tube group plates 3 are provided, and the tube group plate 3 is laminated so that the through hole 4 on the back surface of the substrate 5 and the tube 6 of the adjacent tube group plate 3 communicate with each other. Since the heat exchanger can be easily configured, it is not necessary to use long and thin tubes, and it is not necessary to arrange the tubes at the same time, so that the heat exchanger can be manufactured at a very cheap and simple process. .

  Further, the outer diameter of the tip of the tube 6 is made smaller than the inner diameter of the through-hole 4, and the tip of the tube 6 of the adjacent tube group plate 3 is inserted into the through-hole 4, and an insertion allowance for the tube 6 is provided. In this way, the pipes 6 can be reliably connected to each other, so that reliability against leakage can be ensured.

  Further, a recess 7 having an inner diameter equal to or larger than the outer diameter of the tip of the tube 6 is provided in the through hole 4 on the back surface of the substrate 5, and the tip of the tube 6 of the tube group plate 3 adjacent to the recess 7 is inserted. Since the insertion length of 6 in the through hole 4 can be defined, warping and distortion of the heat exchanger can be suppressed.

  Also, headers 2a and 2b having spaces 8a and 8b inside are provided on both outer sides of the laminated tube group plate 3, and the substrates 5a and 5b at both ends constitute a part of the headers 2a and 2b. Since there is no need to provide a hole for inserting a pipe in 2b or to insert and bond the pipe into the header, it is possible to manufacture with a small number of processes and to ensure reliability against leakage at the header.

  Further, the plane direction of the substrate 5 is arranged in the direction of gravity, and dust accumulation and dew condensation on the substrate 5 can be suppressed, so that an increase in the flow resistance of the fluid B flowing outside the tube is suppressed. Can do.

  Further, the protruding length of the pipe 6a in the space 8a of the header 2a is made non-uniform, and the flow rate ratio of the fluid A flowing through the pipe can be adjusted, so the velocity distribution and temperature of the fluid B flowing outside the pipe The distribution of the heat exchange amount can be optimized according to the distribution.

  Further, the tube group plate 3 is formed by injection molding or press molding, and the tube group plate 3 can be processed in large quantities and quickly in the same shape, so that the quality is stabilized and the processing cost is reduced.

  In addition, the tip of the tube 6 and the back surface of the tube group plate 3 adjacent to each other are joined by welding or diffusion bonding, and since different materials such as a brazing material and an adhesive are not used, precipitation of impurities can be prevented, Safety can be increased.

  In the heat exchanger of the first embodiment, the tube 6 is a circular tube, but the tube 6 may be an elliptical tube or a rectangular tube.

  As described above, the heat exchanger according to the present invention can realize extremely excellent heat exchange performance with a structure that is very easy to manufacture and at low cost, and can be used for heat exchangers for refrigeration equipment and air conditioning equipment. It can also be applied to uses such as waste heat recovery equipment.

The front view of the heat exchanger in Embodiment 1 of this invention Top view of the heat exchanger of the same embodiment AA sectional view of the heat exchanger of FIG. BB sectional view of the heat exchanger of FIG. Front view of tube group plate of heat exchanger of same embodiment Side view of tube group plate of heat exchanger of same embodiment Partial enlarged view of the heat exchanger of the same embodiment Front view of conventional heat exchanger

Explanation of symbols

2 Header 3 Tube group plate 4 Through hole 5 Substrate 6 Tube 7 Recess

Claims (8)

A substrate having a large number of through holes and a plurality of tube group plates composed of a plurality of tubes in which the inside of the tube communicates with the through holes and is provided substantially perpendicularly from the surface of the substrate, and the through holes on the back surface of the substrate The heat exchanger which laminated | stacked the said tube group board so that the said pipe | tube of the said tube group board adjacent to may communicate. 2. The heat exchanger according to claim 1, wherein an outer diameter of a distal end of the tube is made smaller than an inner diameter of the through hole, and the distal end of the tube of the adjacent tube group plate is inserted into the through hole. 3. The recess according to claim 1, wherein a recess having an inner diameter equal to or greater than an outer diameter of the tip of the tube is provided in the through hole on the back surface of the substrate, and the tip of the tube of the tube group plate adjacent to the recess is inserted. Heat exchanger. The heat exchanger according to any one of claims 1 to 3, wherein a header having a space inside is provided on both outer sides of the stacked tube group plates, and the substrates at both ends constitute a part of the header. The heat exchanger as described in any one of Claim 1 to 4 which has arrange | positioned the planar direction of a board | substrate to the gravity direction. The heat exchanger according to claim 4, wherein the protruding length of the pipe in the space of the header is made non-uniform. The manufacturing method of the heat exchanger as described in any one of Claim 1 to 6 which shape | molded the said tube group board by injection molding or press molding. The manufacturing method of the heat exchanger as described in any one of Claim 1 to 6 which joined the back surface of the said tube group board adjacent to the front-end | tip of the said pipe | tube by welding or diffusion bonding.

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