JP2006220387A - Heat exchanger and production method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost and high-reliability heat exchanger having a very easy-to-produce structure while holding very excellent heat exchange performance. <P>SOLUTION: This heat exchanger has: first base plates 10 nearly parallel formed with long slits 40 and short slits 30; and second base plates 20 formed with slits 50 each having the same shape as the short slit 30, and each having a full length shorter than the long slit 40. The plurality of first base plates 10 and the plurality of second base plates 20 are laminated such that the short slits 30 of the first base plates and the slits 50 of the second base plates communicate with each other, an extra-pipe flow passage 60 is configured by the short slits 30 of the first base plates and the slits 50 of the second base plates, and an in-pipe flow passage 70 is configured by the long slits 40 of the first base plates and the second base plates 20. Thereby, a heat exchange part configured by only a pipe can be configured from the base plates formed with the slits, and production can be easily performed to provide the heat exchanger at low cost. <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. 17 is a front view of a conventional heat exchanger described in Patent Document 1. FIG.

  As shown in FIG. 17, the conventional heat exchanger has an inlet tank 1 and an outlet tank 2 that 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 of the present invention includes a first substrate provided with a plurality of long slits and short slits substantially parallel to each other, and a slit having substantially the same shape as the short slit. A plurality of second substrates that are provided at substantially the same position as the projection and that are shorter than the long slits are stacked, the short slits and the slits form an external flow path, and the long slits and the second substrate flow in the tube. A road is constructed.

  Thereby, the heat exchange part comprised only with the pipe | tube can be comprised from the board | substrate which provided the slit, and can be manufactured easily.

  In the heat exchanger of the present invention, a plurality of the first substrates are stacked between the second substrates.

  Accordingly, the cross-sectional area of the flow path in the tube can be easily changed by changing the number of stacked first substrates.

  In the heat exchanger of the present invention, the flow path in the tube is made larger in the substrate stacking direction toward the inflow side of the external fluid.

  Accordingly, since the temperature difference between the external fluid and the internal fluid is large and the inflow side of the external fluid having a large heat exchange amount, the internal fluid can flow more and heat can be exchanged efficiently. Can be small.

  Moreover, the heat exchanger of this invention expands the entrance / exit of the said flow path in a pipe | tube in the said flow path outside a pipe | tube.

  As a result, the opening area of the entrance / exit of the internal fluid can be increased, the resistance in the pipe can be reduced, and the capacity of the heat exchanger can be improved by increasing the flow rate of the internal fluid. Can be small.

  Moreover, the manufacturing method of the heat exchanger of this invention processes the said board | substrate with a press.

  Thereby, a board | substrate can be manufactured easily and cheaply.

  Moreover, the manufacturing method of the heat exchanger of this invention processes the said board | substrate by an etching.

  As a result, even if the gap between the long slit and the short slit is shortened and the flow path wall thickness in the pipe is made thin, no stress is applied at the time of manufacturing the slit, so that it can be manufactured easily.

  Moreover, the manufacturing method of the heat exchanger of this invention joins the said board | substrates by heat welding joining.

  Thereby, it can join easily, without using a brazing material, and does not clog a pipe | tube flow path, and reliability improves.

  Moreover, the manufacturing method of the heat exchanger of this invention joins the said board | substrates by ultrasonic bonding.

  Thereby, since the base material is melted only at the joint portion, the flow path in the tube is not clogged with the melted base material, and the reliability is further improved.

  Moreover, the manufacturing method of the heat exchanger of this invention joins the said board | substrates by diffusion bonding.

  Thereby, since the base material is not melted, the flow path in the tube is not clogged, and the reliability is further improved.

  Since the heat exchanger of the present invention has a structure that is easy to manufacture, the heat exchanger can be provided at low cost.

  Moreover, the manufacturing method of the heat exchanger of this invention can provide an easy and reliable heat exchanger.

  In the first aspect of the present invention, the first substrate having a long slit and a short slit provided substantially in parallel with each other, a slit having substantially the same shape as the short slit, and a total length shorter than the long slit are provided. And stacking a plurality of the first substrate and the second substrate so that the short slit of the first substrate and the slit of the second substrate communicate with each other, A heat exchanger in which a short slit of the first substrate and a slit of the second substrate constitute an external flow path, and a long slit of the first substrate and the second substrate constitute an internal flow path. In addition, conventionally, since the heat exchanging portion constituted only by the tube is constituted by a substrate provided with a slit, it can be easily manufactured and a heat exchanger can be provided at low cost.

  According to a second aspect of the present invention, in the first aspect of the present invention, the second substrate is disposed so as to sandwich the first substrate, and both ends of a long slit are left behind. By interposing between the substrates, the in-pipe flow path can be easily configured with a simple configuration.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the long slits and the short slits are alternately arranged, and the external flow paths and the internal flow paths are alternately arranged. Thus, the heat exchange efficiency can be further improved, and the entire substrate area can be efficiently utilized.

  Invention of Claim 4 is a heat exchanger which laminated | stacked two or more 1st board | substrates of invention of any one of Claim 1 to 3 between 2nd board | substrates, Lamination | stacking of 1st board | substrates By changing the number of sheets, the cross-sectional area of the flow path in the pipe can be easily changed, and the specification of the heat exchanger can be easily changed, so that the heat exchanger can be provided at low cost.

  The invention according to claim 5 is a heat exchanger in which the pipe flow path of the invention according to any one of claims 1 to 4 is increased in the substrate stacking direction toward the inflow side of the external fluid. Because the temperature difference of the internal fluid is large and the inflow side of the external fluid where the amount of heat exchange is large, it is possible to exchange heat efficiently by flowing more internal fluid, so the heat exchanger can be further reduced in size and inexpensive. A heat exchanger can be provided.

  Invention of Claim 6 is a heat exchanger which expanded the entrance / exit of the flow path in the pipe | tube of the invention as described in any one of Claim 1 to the flow path outside a pipe | tube, and is the opening area of the entrance / exit of an internal fluid Since the capacity of the heat exchanger can be improved by reducing the resistance in the pipe and increasing the flow rate of the internal fluid, the heat exchanger can be made small.

  Invention of Claim 7 is a manufacturing method of the heat exchanger which processed the board | substrate of the invention as described in any one of Claim 1-6 by press, and can manufacture a board | substrate easily and cheaply, A heat exchanger can be provided at low cost.

  Invention of Claim 8 is a manufacturing method of the heat exchanger which processed the board | substrate of invention as described in any one of Claim 1 to 6 by etching, shortens between a long slit and a short slit, Even if the channel wall thickness is reduced, it can be easily manufactured, and a heat exchanger can be provided at low cost.

  The invention according to claim 9 is a method of manufacturing a heat exchanger in which the substrates of the invention according to any one of claims 1 to 6 are bonded to each other by heat welding, and is easily bonded without using a brazing material. Therefore, the flow path in the pipe is not clogged by the brazing material, the reliability is improved, and the heat exchanger can be provided at a low cost.

  Invention of Claim 10 is a manufacturing method of the heat exchanger which joined the board | substrates of invention of any one of Claim 1 to 6 by ultrasonic bonding, and since a base material fuse | melts only a junction part. The melted base material does not clog the flow path in the tube, and the reliability can be further improved and the heat exchanger can be provided at a low cost.

  Invention of Claim 11 is a manufacturing method of the heat exchanger which joined the board | substrates of invention of any one of Claim 1 to 6 by diffusion bonding, and since diffusion bonding does not melt a base material, It is possible to provide a heat exchanger at low cost while further improving the reliability without clogging the flow path in the pipe.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a perspective view of a heat exchange unit according to Embodiment 1 of the present invention. The heat exchanging portion is configured by alternately laminating the first substrate 10 and the second substrate 20.

  FIG. 2 is a front view of the first substrate of the embodiment, and FIG. 3 is a front view of the second substrate of the embodiment. In the first substrate 10, a plurality of short slits 30 and a plurality of long slits 40 are arranged alternately one by one in parallel. In the second substrate 20, a slit 50 having the same shape as the short slit 30 is provided at the same position as the projection of the short slit 30.

  Thus, since the short slit 30 and the slit 50 overlap on the projection surface, they communicate with each other, and the extra-tube flow path 60 is configured. Further, regarding the dimension of the second substrate 20, the dimension in the longitudinal direction of the slit 50 is shorter than the length of the long slit 40 in the longitudinal direction, and both ends of the long slit 40 are outside the both ends of the second substrate 20. An in-tube flow path 70 is configured by sandwiching the portion other than both ends of the long slit 40 between the second substrates 20, and both ends of the long slit 40 serve as entrances and exits of the in-tube flow path 70. In the present embodiment, the first substrate 10 and the second substrate 20 are alternately installed. However, when the cross-sectional area of the in-tube flow path 70 is to be increased, the first substrate 10 is interposed between the second substrates 20. You may install more than one.

  If the first substrate 10 and the second substrate 20 are joined together by heat welding, the brazing material is not used and the base material is melted and joined, so that the brazing material does not flow into the in-pipe channel 70. In addition, defects due to clogging of the in-tube flow path 70 can be reduced. In particular, in ultrasonic bonding, only the bonded portion can be heated, so that reliability is further improved. In addition, diffusion bonding causes atomic diffusion (interdiffusion) phenomenon by simultaneously applying heating and pressurization to a temperature at which the base material does not melt, and bonding is performed by linking atoms. Therefore, it is possible to prevent clogging of the in-pipe flow path 70 and further improve the reliability.

  If the 1st board | substrate 10 and the 2nd board | substrate 20 are shape | molded by press work, since it can shape | mold comparatively easily and in large quantities, a heat exchanger can be provided cheaply. At this time, the distance between the short slit 30 and the long slit 40 which become the walls of the in-pipe flow path 70 is larger than the thickness of the first substrate 10, and the in-pipe flow path 70 wall is not twisted by the stress during the press working. , The defective rate can be reduced. Therefore, a heat exchanger can be provided at low cost. In addition, if the first substrate 10 and the second substrate 20 are formed by etching, no stress is applied during slit forming. Therefore, the wall of the pipe flow path 70 is not twisted, and the wall of the pipe flow path 70 can be reduced. Therefore, the heat exchanger can be easily manufactured and can be provided at a low cost.

  FIG. 4 is a front view of the heat exchanger according to Embodiment 1 of the present invention, and FIG. 5 is a side view of the heat exchanger according to the same embodiment. 6 is a cross-sectional view taken along line AA in FIG. 4, and FIG. 7 is a cross-sectional view taken along line BB in FIG. 8 is a cross-sectional view taken along the line CC of FIG. Normally, the internal fluid inlet header 80 and the outlet header 90 are attached to both ends of the heat exchange unit. The inlet header 80 and the outlet header 90 may be interchanged.

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

  The internal fluid that has flowed in from the inlet header 80 is branched and flows in the in-pipe channel 70, and flows out from the outlet header 90. Further, the external fluid flows in the planar direction of the first substrate 10 and the second substrate 20 through the extra-tube flow path 60. The internal fluid and the external fluid exchange heat in the heat exchange section. At this time, by narrowing the width of the long slit 40 provided in the first substrate 10 and reducing the distance between the short slit 30 and the long slit 40, the tube is thinned and the width of the short slit 30 and the slit 50 is reduced. Since the pipe pitch can be easily reduced by reducing the size, a very compact heat exchanger can be easily configured.

  As described above, in the present embodiment, the first substrate 10 in which the plurality of long slits 40 and the plurality of short slits 30 are alternately arranged in parallel one by one, and the short slits 30 have substantially the same shape. A plurality of slits 50 are provided at substantially the same position as the projections of the short slits 30 and a plurality of second substrates 20 shorter than the long slits 40 are stacked, and the short slits 30 and the slits 50 constitute the external flow path 60. 40 and the second substrate 20 sandwiching this, the pipe internal flow path 70 is configured. Conventionally, the heat exchanging portion constituted only by the tube is constituted by a substrate provided with a slit, and is easily manufactured. The heat exchanger can be provided at low cost.

  In the present embodiment, the first substrate 10 and the second substrate 20 are processed by pressing, and the substrate can be manufactured easily, in large quantities and at low cost, and a heat exchanger can be provided at low cost. Can do.

  Further, in the present embodiment, if the first substrate 10 and the second substrate 20 are bonded to each other by heat welding, the brazing material is melted and bonded without using the brazing material. It does not flow into the channel 70, and defects due to clogging of the in-pipe channel 70 can be reduced. In particular, in ultrasonic bonding, only the bonded portion can be heated, so that reliability is further improved. In addition, diffusion bonding causes atomic diffusion (interdiffusion) phenomenon by simultaneously applying heating and pressurization to a temperature at which the base material does not melt, and bonding is performed by linking atoms. Therefore, it is possible to prevent clogging of the flow path 70 in the tube, further improve the reliability, reduce defective products, and provide a heat exchanger at low cost.

  In the present embodiment, the plurality of short slits 30 and the plurality of long slits 40 are alternately arranged one by one so that the external flow paths 60 and the internal flow paths 70 are alternately arranged. In this way, the heat exchange efficiency is further improved and the entire area of the substrate can be efficiently used. However, the present invention is not limited to this form. For example, a plurality of long slits 40 may be disposed between the short slits 30; A plurality of short slits 30 may be arranged between the long slits 40.

  In addition, it is possible to divide and arrange the areas of the plurality of short slits 30 and the plurality of long slits 40 in consideration of design convenience and other conditions.

  Furthermore, as long as the same action can be expected instead of the short slit 30 and the long slit 40, the shape is not necessarily limited to the slit shape.

  In addition, it is preferable to arrange the short slit 30 and the long slit 40 substantially in parallel in terms of space factor and heat exchange efficiency in the formation of the flow path, but this point is not necessarily limited to the substantially parallel arrangement. It is also possible to carry out by appropriately modifying according to the above and processing circumstances.

(Embodiment 2)
FIG. 9 is a perspective view of a heat exchange unit according to Embodiment 2 of the present invention. The heat exchanging portion is configured by laminating the first substrate 110 so that the second substrate 120 is sandwiched therebetween, and the external flow path 160 is configured by the short slit 130 and the slit 150 as in the first embodiment. The long slit 140 and the second substrate 120 constitute an in-tube flow path 170. Here, three first substrates 110 are stacked between the second substrates 120 on the inflow side of the external fluid, and then two sheets are stacked, and one sheet is stacked at the outlet of the external fluid. The fluid inflow side is increased in the substrate stacking direction. In the present embodiment, three rows are arranged in the flow direction of the external fluid. Further, the length of the in-tube flow path 170 in the substrate stacking direction is increased by changing the number of stacked first substrates 110, but the thickness of the first substrate 110 is changed to increase the length of the substrate stacking direction. You can also.

  FIG. 10 is a front view of the first substrate of the embodiment, and FIG. 11 is a front view of the second substrate of the embodiment. The first substrate 110 is provided with a plurality of short slits 130 and long slits 140 substantially in parallel. An in-pipe channel inlet 171 and an in-pipe channel outlet 172 of the long slit 140 are expanded in the direction of the extra-tube channel 160. Similarly to the first embodiment, the second substrate 120 is provided with a slit 150 having the same shape as the short slit 130 at the same position as the projection of the short slit 130.

  If the first substrate 110 and the second substrate 120 are bonded to each other by heat welding, the brazing material is not used and the base material is melted and joined, so that the brazing material does not flow into the in-tube flow path 170. In addition, defects due to clogging of the in-tube flow path 170 can be reduced. In particular, in ultrasonic bonding, only the bonded portion can be heated, so that reliability is further improved. In addition, diffusion bonding causes atomic diffusion (interdiffusion) phenomenon by simultaneously applying heating and pressurization to a temperature at which the base material does not melt, and bonding is performed by linking atoms. Therefore, the clogging of the pipe flow path 170 can be prevented, and the reliability is further improved.

  If the first substrate 110 and the second substrate 120 are formed by press working, they can be formed relatively easily and in large quantities, so that a heat exchanger can be provided at a low cost. At this time, the distance between the short slit 130 and the long slit 140 that are walls of the pipe flow path 170 is larger than the thickness of the first substrate 110, and the wall of the pipe flow path 170 is less likely to be twisted due to stress during the pressing process. The defective rate is reduced, and the heat exchanger can be provided at low cost. Further, if the first substrate 110 and the second substrate 120 are formed by etching, the wall of the in-tube flow path 170 is not twisted and can be easily manufactured even if the in-tube flow path 170 wall is made small. The heat exchanger can be provided at low cost.

  FIG. 12 is a front view of a heat exchanger according to Embodiment 2 of the present invention, and FIG. 13 is a side view of the heat exchanger of the same embodiment. 14 is a cross-sectional view taken along the line DD of FIG. 12, and FIG. 15 is a cross-sectional view taken along the line EE of FIG. 16 is a cross-sectional view taken along line FF in FIG. Normally, the internal fluid inlet header 80 and the outlet header 90 are attached to both ends of the heat exchange unit. The inlet header 80 and the outlet header 90 may be interchanged.

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

  The internal fluid that flows in from the inlet header 80 is branched and flows from the in-pipe channel inlet 171 through the in-pipe channel 170, and then flows out from the outlet header 90 through the in-pipe channel outlet 172. At this time, since the in-pipe channel inlet 171 and the in-pipe channel outlet 172 are enlarged, the channel resistance is small, and the circulation amount of the internal fluid can be increased even with the same pump power. Therefore, the amount of heat exchange is improved and the heat exchanger can be made small, so that the heat exchanger can be provided at low cost. Further, the external fluid flows in the planar direction of the first substrate 110 and the second substrate 120 through the extra-tube flow path 160. The internal fluid and the external fluid exchange heat in the heat exchange section. At this time, by increasing the number of first substrates 110 stacked on the upstream side of the external fluid where the temperature difference between the external fluid and the internal fluid is large, the length in the substrate stacking direction is increased, so that a large amount of internal fluid can flow. The amount of heat exchange can be improved, the heat exchanger can be made smaller, and the heat exchanger can be provided at low cost.

  As described above, in the present embodiment, the first substrate 110 in which a plurality of long slits 140 and short slits 130 are provided substantially in parallel, and the slits 150 having substantially the same shape as the short slits 130 are projected by the short slits 130. And a plurality of second substrates 120 that are shorter than the long slits 140 are stacked, the short slits 130 and the slits 150 constitute the extra-tube flow path 160, and the long slits 140 and the second substrate 120 are within the tube. Since the flow path 170 is configured, it can be easily manufactured and a heat exchanger can be provided at low cost.

  In the present embodiment, since the pipe flow path 170 is increased in the substrate stacking direction as the inflow side of the external fluid, the temperature difference between the external fluid and the internal fluid is large, and the inflow side of the external fluid having a large heat exchange amount is By flowing a large amount of the internal fluid, the amount of heat exchange is improved, the heat exchanger can be further reduced, and the heat exchanger can be provided at low cost.

  In the present embodiment, the number of the first substrates 110 stacked between the second substrates 120 is increased and decreased, and the size of the in-pipe flow path 170 in the substrate stacking direction is changed. The heat exchanger can be provided at low cost.

  In this embodiment, since the inlet 171 and outlet 172 of the in-pipe channel 170 are expanded in the direction of the extra-pipe channel 160, the opening area of the inlet / outlet of the inner fluid can be increased, the in-pipe resistance is reduced, and the inner fluid is reduced. Since the amount of the heat exchanger can be improved by increasing the flow rate, the heat exchanger can be made smaller.

  In the present embodiment, if the first substrate 110 and the second substrate 120 are formed by press working, they can be formed relatively easily and in large quantities, so that a heat exchanger can be provided at low cost. At this time, the distance between the short slit 130 and the long slit 140 that are walls of the pipe flow path 170 is larger than the thickness of the first substrate 110, and the wall of the pipe flow path 170 is less likely to be twisted due to stress during the pressing process. The defective rate is reduced, and the heat exchanger can be provided at low cost. Further, if the first substrate 110 and the second substrate 120 are formed by etching, the wall of the in-tube flow path 170 is not twisted and can be easily manufactured even if the in-tube flow path 170 wall is made small. The heat exchanger can be provided at low cost.

  Further, in the present embodiment, if the first substrate 110 and the second substrate 120 are bonded to each other by heat welding, the brazing material is melted and bonded without using the brazing material. It does not flow into the channel 170, and defects due to clogging of the in-pipe channel 170 can be reduced. In particular, in ultrasonic bonding, only the bonded portion can be heated, so that reliability is further improved. In addition, diffusion bonding causes the atomic diffusion (interdiffusion) phenomenon by simultaneously applying heating and pressurization to a temperature at which the base material does not melt, and bonds by bonding of atoms. There is no melting of the material, the clogging of the in-tube flow path 170 can be prevented, the reliability is further improved, defective products can be 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 perspective view of the heat exchange part in Embodiment 1 of this invention Front view of the first substrate in Embodiment 1 of the present invention Front view of second substrate in embodiment 1 of the present invention 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 FIG. BB sectional view of FIG. CC sectional view of FIG. The perspective view of the heat exchange part in Embodiment 2 of this invention Front view of first substrate according to Embodiment 2 of the present invention Front view of the second substrate in Embodiment 2 of the present invention Front view of heat exchanger according to Embodiment 2 of the present invention Side view of the heat exchanger of the same embodiment DD sectional view of FIG. EE sectional view of FIG. FF sectional view of FIG. Front view of conventional heat exchanger

Explanation of symbols

10, 110 First substrate 20, 120 Second substrate 30, 130 Short slit 40, 140 Long slit 50, 150 Slit 60, 160 External flow channel 70, 170 Internal flow channel 171 Internal flow channel inlet 172 Internal flow channel outlet

Claims (11)

  A first substrate provided with a long slit and a short slit substantially in parallel, and a second substrate provided with a slit having substantially the same shape as the short slit and having a shorter overall length than the long slit; A plurality of the first substrate and the second substrate are stacked so that the short slit of the first substrate and the slit of the second substrate communicate with each other, and the short slit of the first substrate and the slit A heat exchanger in which an external flow path is configured with the slits of the second substrate, and an internal flow path is configured with the long slits of the first substrate and the second substrate.   The heat exchanger according to claim 1, wherein the heat exchanger is disposed so that the first substrate is sandwiched between the second substrates.   The heat exchanger according to claim 1 or 2, wherein the long slits and the short slits are alternately arranged.   The heat exchanger according to any one of claims 1 to 3, wherein a plurality of the first substrates are stacked between the second substrates.   The heat exchanger according to any one of claims 1 to 4, wherein the flow path in the pipe is increased in the substrate stacking direction toward the inflow side of the external fluid.   The heat exchanger according to any one of claims 1 to 5, wherein an entrance / exit of the flow path in the pipe is expanded in the direction of the flow path outside the pipe.   The manufacturing method of the heat exchanger as described in any one of Claim 1 to 6 which processed the said board | substrate with the press.   The manufacturing method of the heat exchanger as described in any one of Claim 1 to 6 which processed the said board | substrate by the etching.   The method for manufacturing a heat exchanger according to any one of claims 1 to 6, wherein the substrates are bonded to each other by heat welding.   The method for manufacturing a heat exchanger according to any one of claims 1 to 6, wherein the substrates are bonded to each other by ultrasonic bonding.   The method for manufacturing a heat exchanger according to any one of claims 1 to 6, wherein the substrates are bonded to each other by diffusion bonding.

Images