JP2017110845A - Heat exchange member and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control timing at which solution in a super cooling state starts coagulating.SOLUTION: A heat exchange member 11 includes a wall member 21 and a carbon fiber flux 31. The carbon fiber flux 31 includes an exposure part 32 exposed to a first medium M1. The carbon fiber flux 31 includes a buried part 33 buried in the wall member 21 by piercing into the wall member 21. The carbon fiber flux 31 is formed by piercing a plurality of carbon fibers into the wall member 21. The carbon fiber flux 31 provides a high heat transmission. Also, the buried part 33 attains high heat transmission between the carbon fiber flux 31 and the wall member 21.SELECTED DRAWING: Figure 4

Description

  The present disclosure relates to a heat exchange member that exchanges heat with a heat medium and a method of manufacturing the same.

  Patent Document 1 and Patent Document 2 disclose a heat exchanger formed by a heat exchange member. The conventional heat exchange member is provided with fins in order to increase the heat transfer area with the heat medium. The fin is provided by a plate-like member. For example, the fin is provided by a metal plate such as copper or aluminum.

Japanese Patent No. 4358687 JP-A-5-231792

  In the conventional heat exchange member, fin miniaturization has a limit due to limitations on mechanical processing such as cutting and bending of a metal plate. Further, the limitation on the joining process for joining metal plates by brazing or the like also hinders fin miniaturization. In addition, with thermal conductivity that can be realized with a metal material, if the fin thickness is reduced, sufficient heat may not be transmitted to the tip of the fin. For this reason, fin efficiency falls. Further, if the height of the fins is suppressed, it is difficult to provide a wide heat transfer area. In view of the above, or other aspects not mentioned, there is a need for further improvements in heat exchangers.

  One disclosed object is to provide a heat exchange member capable of realizing high heat transfer and a method for manufacturing the same.

  Another object of the present disclosure is to provide a heat exchange member having a plurality of fine fins arranged at a high density and a method for manufacturing the heat exchange member.

  The heat exchange member disclosed here is formed of a resin wall member (21) that forms a flow path (22) for flowing a heat medium and a plurality of carbon fibers, and is formed in the heat medium (M1). A carbon fiber bundle (31) having an exposed portion (32) to be exposed and an embedded portion (33) embedded in the wall member (21).

  According to the disclosed heat exchange member, since the carbon fiber bundle is formed of a plurality of carbon fibers, high thermal conductivity is obtained along the length direction of the carbon fiber bundle. Therefore, the carbon fiber bundle exchanges heat with the heat medium with high efficiency. In addition, since the carbon fiber bundle has an embedded portion embedded in the wall member, high heat transfer can be obtained between the carbon fiber bundle and the wall member. As a result, the heat exchange member exhibits high heat transfer between the heat medium and the wall member.

  A heat exchange member manufacturing method for manufacturing a heat exchange member includes: forming a soft layer capable of piercing a carbon fiber on a wall member; and applying a high voltage between the plurality of carbon fibers and the wall member. This includes moving the carbon fiber toward the wall member and piercing the carbon fiber into the layer.

  According to this method for producing a heat exchange member, a carbon fiber bundle can be formed efficiently. As a result, a method for manufacturing a heat exchange member capable of realizing high heat transfer is provided.

  The disclosed embodiments of the present specification employ different technical means to achieve each purpose. The reference numerals in parentheses described in the claims and this section exemplify the correspondence with the embodiments described later, and are not intended to limit the technical scope. The objects, features, and advantages disclosed in this specification will become more apparent with reference to the following detailed description and accompanying drawings.

It is a perspective view of the heat exchanger which concerns on 1st Embodiment. It is an expansion perspective view of the heat exchange member of a 1st embodiment. It is an enlarged plan view of the heat exchange member of the first embodiment. It is an expanded sectional view of the heat exchange member of a 1st embodiment. It is process drawing which shows the manufacturing method of 1st Embodiment. It is sectional drawing which shows the manufacturing apparatus of 1st Embodiment. It is sectional drawing which shows the manufacturing apparatus of 1st Embodiment. It is sectional drawing which shows the manufacturing apparatus of 1st Embodiment. It is sectional drawing which shows the manufacturing apparatus of 1st Embodiment. It is an expanded sectional view of the heat exchange member of a 2nd embodiment. It is an expanded sectional view of the heat exchange member of a 3rd embodiment. It is an expanded sectional view of the heat exchange member of a 4th embodiment. It is an expanded sectional view of the heat exchange member of a 5th embodiment. It is an expanded sectional view of the heat exchange member of a 6th embodiment. It is an expanded sectional view of the heat exchange member of a 7th embodiment. It is an enlarged plan view of the heat exchange member of 8th Embodiment. It is an enlarged plan view of the heat exchange member of the ninth embodiment. It is an enlarged plan view of the heat exchange member of 10th Embodiment.

  A plurality of embodiments will be described with reference to the drawings. In embodiments, functionally and / or structurally corresponding parts and / or associated parts may be assigned the same reference signs or reference signs that differ by more than a hundred. For the corresponding parts and / or associated parts, the description of other embodiments can be referred to.

1st Embodiment In FIG. 1, the heat exchanger 10 provides the heat exchange between the 1st medium M1 which is a heat transport medium, and the 2nd medium M2 which is a heat transport medium. These media are fluids. The first medium M1 and the second medium M2 are heat transport media having different temperatures. The heat exchanger 10 illustrated here is a tank-and-tube type heat exchanger. For example, the heat exchanger 10 can be used as a heat radiator for cooling the second medium M2. In one example of application, the first medium M1 is low-temperature air and the second medium M2 is a high-temperature liquid. The heat exchanger 10 can be used as a heater for heating the second medium M2. In one example of application, the first medium M1 is a high-temperature combustion gas, and the second medium M2 is a low-temperature liquid.

  The heat exchanger 10 includes a plurality of tubes and a tank that communicates the plurality of tubes. The plurality of tubes have an outer surface in contact with the first medium M1 outside thereof. The plurality of tubes provide a plurality of passages for flowing the second medium M2 therein. The plurality of tanks distribute the second medium M2 to the plurality of tubes and collect the second medium M2 from the plurality of tubes. The heat exchanger 10 is formed by a heat exchange member 11. The heat exchange member 11 defines a flow path for allowing the first medium M1 to flow outside thereof. The heat exchange member 11 is provided between the first medium M1 and the second medium M2.

  The heat exchange member 11 includes a base material 20 and a fin group 30. The base material 20 defines an external flow path for flowing the first medium M1. The base material 20 is also a member that partitions the first medium M1 and the second medium M2. The fin group 30 is a member for increasing the surface area of the heat exchange member 11. The fin group 30 is provided on the surface of the substrate 20. The fin group 30 is provided on the surface of the substrate 20 that is in contact with the first medium M1. The fin group 30 provides heat exchange between the first medium M <b> 1 and the base material 20. The first medium M <b> 1 and the second medium M <b> 2 are heat-exchanged through the base material 20 and the fin group 30.

  FIG. 2 is an enlarged perspective view showing the heat exchange member 11. The fin group 30 has a plurality of fine carbon fiber bundles 31. The plurality of carbon fiber bundles 31 are arranged at a high density on the surface of the substrate 20. Each carbon fiber bundle 31 provides one fin. The carbon fiber bundle 31 is columnar. The carbon fiber bundle 31 is cylindrical. The carbon fiber bundle 31 is also called a pin fin.

  FIG. 3 is an enlarged plan view showing the heat exchange member 11. The plurality of carbon fiber bundles 31 are regularly arranged so that the first medium M1 flows along the surface of each carbon fiber bundle 31. The plurality of carbon fiber bundles 31 are dispersedly arranged in the flow of the first medium M1. The plurality of carbon fiber bundles 31 extend perpendicular to the flow of the first medium M1.

  FIG. 4 is a cross-sectional view showing the heat exchange member 11. The wall member 21 is a member that partitions the first flow path 22 for the first medium M1 and the second flow path 23 for the second medium M2. The carbon fiber bundle 31 has an exposed portion 32 and an embedded portion 33. The exposed portion 32 including the tip of the carbon fiber bundle 31 is positioned in the first medium M1. The embedded portion 33 including the proximal end of the carbon fiber bundle 31 is embedded in the base material 20 that defines the flow path for the first medium M1, that is, the wall member 21. The buried portion 33 is stuck in the wall member 21. The carbon fiber bundle 31 extends vertically from the surface of the wall member 21. The carbon fiber bundle 31 exchanges heat with the first medium M1 by directly contacting the first medium M1 at the exposed portion 32. The carbon fiber bundle 31 exchanges heat with the wall member 21 by directly contacting the wall member at the embedded portion 33. As a result, the carbon fiber bundle 31 provides heat exchange between the first medium M1 and the wall member 21. The carbon fiber bundle 31 can also be referred to as a heat transfer member that provides heat transfer between the first medium M1 and the wall member 21.

  The wall member 21 is made of resin. The wall member 21 is a thermoplastic resin. The resin material forming the wall member 21 is a resin that becomes soft enough to stab carbon fibers by heating. The resin material forming the wall member 21 is a resin that provides a hardness that can maintain the shape required for the heat exchanger 10 between the first medium M1 and the second medium M2 in the cured state.

  Returning to FIG. 2, the carbon fiber bundle 31 is a bundle of a plurality of carbon fibers (carbon fibers). The thickness DF of the carbon fiber bundle 31 is 40 μm or less. The thickness DF is called a representative thickness. The thickness DF is the thickness of the carbon fiber bundle 31 in the flow direction of the first medium M1. In the illustrated example, the diameter of the carbon fiber bundle 31 is the thickness DF. The minimum value of the thickness DF depends on the diameter of one carbon fiber. For example, the minimum value of the thickness DF is 5 μm. The thickness DF of the carbon fiber bundle 31 perpendicular to the flow direction of the heat medium is 5 μm or more and 40 μm or less.

  The height HF of the carbon fiber bundle 31 is not more than 500 times the thickness DF. The axial height HF of the carbon fiber bundle 31 perpendicular to the flow direction of the heat medium is not more than 500 times the thickness DF. The height HF is set according to the thermal conductivity of the carbon fiber. Carbon fibers exhibit much higher thermal conductivity than metals. Therefore, the ratio between the thickness DF and the height HF of the carbon fiber bundle 31 is much larger than that of the metal fin. For example, the thermal conductivity of carbon fibers reaches 8 times or more that of aluminum. Therefore, the carbon fiber bundle 31 can provide a small thickness DF and a large height HF as compared with a metal fin. The height HF is set according to the length of one carbon fiber.

  One carbon fiber is pitch-based carbon. The carbon fiber used in this embodiment is a carbon fiber exhibiting anisotropy. This carbon fiber exhibits high thermal conductivity in the length direction. The diameter of one carbon fiber is approximately 5 μm to 10 μm. The length of one carbon fiber is set according to the height HF required for the carbon fiber bundle 31.

  FIG. 5 is a process diagram showing a method for manufacturing the heat exchange member 11. The manufacturing method 150 of the heat exchange member 11 includes steps 150 to 155. Step 151 is a step of supplying a material. Here, the carbon fiber forming the carbon fiber bundle 31 and the resin material forming the substrate 20 are supplied. The carbon fiber is supplied to a manufacturing apparatus described later. The resin material is formed into a plate shape to provide the wall member 21.

  In step 152, a soft layer capable of inserting carbon fibers is formed on the surface of the wall member 21. The soft layer softens a predetermined thickness from the surface of the wall member 21 to a softness that allows carbon fibers to be inserted by heating the wall member 21. The soft layer is softer than the hardness after the resin material forming the wall member 21 is cured. By this step, a soft layer that can pierce the carbon fiber into the wall member 21 is formed.

  In step 153, the carbon fiber is pierced into the wall member 21. Here, the carbon fiber is oriented and moved using a high voltage. This process can also be referred to as a high voltage flocking process, with the carbon fibers regarded as hair.

  6 to 9 show a manufacturing apparatus 40 for inserting the carbon fiber into the wall member 21. 6-9 show several stages in the process. The manufacturing apparatus 40 includes a case 41, carbon fibers 42, and a filter 43. Further, the manufacturing apparatus 40 includes high voltage power supplies 45 and 46.

  Case 41 accommodates and holds carbon fiber 42. The case 41 has a shape that can store a plurality of random carbon fibers 42. The filter 43 is a member that defines the shape of the carbon fiber bundle 31. The filter 43 has a plurality of through holes 44. The positions of the plurality of through holes 44 correspond to the positions of the plurality of carbon fiber bundles 31. The shape of the plurality of through holes 44 corresponds to the shape of the carbon fiber bundle 31. For example, the shape of the opening of the through hole 44 corresponds to the shape of the end face of the carbon fiber bundle 31. The shape of the cylindrical inner surface extending along the axial direction of the through hole 44 corresponds to the shape of the outer peripheral surface of the carbon fiber bundle 31.

  FIG. 6 shows the first stage of the high voltage flocking process. The filter 43 is disposed on the case 41. Further, the wall member 21 is disposed on the filter 43. The wall member 21 is disposed in contact with the filter 43 or with a minute gap formed between the wall member 21 and the filter 43. In the figure, a tubular wall member 21 that partitions the second flow path 23 is illustrated.

  FIG. 7 shows the second stage of the high voltage flocking process. At this stage, a high voltage is applied between the wall member 21 and the case 41. The high voltage is applied for a predetermined time. The high voltage is a voltage that allows the carbon fiber 42 to fly from the inside of the case 41 to the wall member 21 and further accelerates so as to pierce the carbon fiber 42 into the wall member 21. In one example, a high voltage of 20 kV to 50 kV is applied to the case 41. Further, a high voltage having a polarity opposite to that of the case 41 is applied to the wall member 21. The application of the high voltage to the wall member 21 may be performed by a conductive plate installed behind the wall member 21.

  The carbon fiber 42 is charged by a high voltage and moves from the inside of the case 41 toward the wall member 21. At this time, the carbon fibers 42 are oriented along the direction of the potential difference. Here, the carbon fibers 42 are oriented so as to be perpendicular to the surface of the wall member 21. The carbon fibers 42 fly toward the wall member 21 in an oriented state. Furthermore, the carbon fiber 42 is accelerated by a high voltage.

  The carbon fiber 42 passes through the through hole 44 of the filter 43 and reaches the wall member 21. The carbon fibers 42 that have reached the wall member 21 pierce the wall member 21. Thereby, the buried portion 33 is formed. Further, the exposed portion from the wall member 21 forms an exposed portion 32. The filter 43 restricts the carbon fibers 42 that reach the wall member 21. The filter 43 defines a range in which the carbon fibers 42 are pierced on the surface of the wall member 21. As a result, the carbon fiber 42 having a shape corresponding to the through hole 44 of the filter 43 is pierced on the wall member 21. A plurality of carbon fibers 42 are supplied into one through hole 44. The carbon fiber 42 that has collided with the filter 43 falls into the case 41 again. As a result, a carbon fiber bundle 31 is formed on the wall member 21. When the carbon fiber bundle 31 is formed, application of a high voltage is stopped.

  FIG. 8 shows the third stage of the high voltage flocking process. The carbon fiber 42 pierces the wall member 21 while filling the inside of the through hole 44. As a result, the carbon fiber bundle 31 is given a shape corresponding to the shape of the through hole 44.

  FIG. 9 shows the fourth stage of the high voltage flocking process. At this stage, the wall member 21 and the filter 43 are pulled apart. When the wall member 21 is pulled away from the filter 43, the carbon fibers 42 piercing the wall member 21 remain on the wall member 21. As a result, the heat exchange member 11 is formed.

  Returning to FIG. 5, in step 154, the soft layer is cured. Here, the resin material forming the wall member 21 is cooled to a normal use temperature. Thereby, the wall member 21 regains the hardness in use temperature. In this step, the soft layer is cured and the carbon fiber bundle 31 is fixed to the wall member 21. The heat exchange member 11 is manufactured by the processes from step 151 to step 154. According to the manufacturing method of the heat exchange member, the carbon fiber bundle 31 that exhibits excellent heat transfer can be formed on the wall member 21. Moreover, the plurality of carbon fiber bundles 31 can be formed on the wall member 21 with high density. In step 155, the heat exchanger 10 is assembled using the heat exchange member 11.

  According to the embodiment described above, the carbon fiber bundle 31 can be formed on the surface of the wall member 21. The carbon fiber bundle 31 has a high thermal conductivity along the axial direction, that is, the longitudinal direction. The high thermal conductivity suppresses a temperature gradient in the longitudinal direction of the carbon fiber bundle 31. As a result, the carbon fiber bundle 31 exhibits high fin efficiency over a wide range in the longitudinal direction. As a result, the heat exchange member 11 that can realize high heat transfer can be provided.

  Furthermore, the carbon fiber bundles 31 are arranged with high density. Thereby, the heat exchange member 11 having a plurality of fine fins arranged at a high density can be provided. Moreover, since the carbon fiber bundle 31 is formed by the filter 43, a plurality of fine fins can be formed at a high density by a simple manufacturing method.

Second Embodiment This embodiment is a modified example based on the preceding embodiment. In the above embodiment, the carbon fiber bundle 31 is stuck into the surface layer portion of the wall member 21 on the first flow path 22 side. Instead, the carbon fiber bundle 31 may be deeply pierced into the wall member 21.

  As illustrated in FIG. 10, the carbon fiber bundle 31 has an embedded portion 233 that is deeply pierced into the wall member 21. Buried portion 233 has a length LE. The wall member 21 left on the extension of the carbon fiber bundle 31 has a thickness LR. The length LE is greater than the thickness LR.

  According to this embodiment, the same effect as the preceding embodiment can be obtained. Furthermore, according to this embodiment, the embedded portion 233 having a long length LE enables high heat transfer from the carbon fiber bundle 31 to the wall member 21. The thin wall member 21 having the thickness LR prevents the leakage of the first medium M1 and / or the second medium M2. In addition, the thin wall member 21 having the thickness LR enables high heat transfer from the carbon fiber bundle 31 to the second medium M2.

Third Embodiment This embodiment is a modification in which the preceding embodiment is a basic form. In the above embodiment, the carbon fiber bundle 31 is stuck into the wall member 21. Instead of this, the carbon fiber bundle 31 may penetrate the wall member 21.

  As illustrated in FIG. 11, the carbon fiber bundle 31 has an embedded portion 333 that penetrates the wall member 21. The base end of the embedded part 333 faces the second flow path 23. The carbon fiber bundle 31 may have a portion protruding into the second flow path 23.

  According to this embodiment, the same effect as the preceding embodiment can be obtained. Furthermore, according to this embodiment, the carbon fiber bundle 31 directly contributes to heat transfer between the first medium M1 and the second medium M2.

Fourth Embodiment This embodiment is a modified example based on the preceding embodiment. In the above embodiment, only the resin wall member 21 is disposed between the first flow path 22 and the second flow path 23. In addition to this, a metal wall member 424 may be disposed.

  As shown in FIG. 12, the base material 20 is provided by a resin wall member 21 and a metal wall member 424. The wall member 21 and the wall member 424 are joined so as to provide an integral wall. The wall member 21 is disposed on the first flow path 22 side. The wall member 424 is disposed on the second flow path 23 side. The wall member 21 also functions as a fixing member for fixing the carbon fiber bundle 31.

  According to this embodiment, the same effect as the preceding embodiment can be obtained. Furthermore, according to this embodiment, a metal material suitable for the second medium M2 can be used.

Fifth Embodiment This embodiment is a modified example based on the preceding embodiment. In the above embodiment, the carbon fiber bundle 31 does not penetrate the wall member 21. Instead, the base end of the carbon fiber bundle 31 may be in contact with the wall member 424.

  As illustrated in FIG. 13, the carbon fiber bundle 31 has an embedded portion 533 that penetrates through the wall member 21 and includes a proximal end that contacts the wall member 424. According to this embodiment, the same effect as the preceding embodiment can be obtained. Furthermore, according to this embodiment, the carbon fiber bundle 31 can perform high heat transfer with the wall member 424.

Sixth Embodiment This embodiment is a modification in which the preceding embodiment is a basic form. In the above embodiment, the through hole 44 has a cylindrical shape. Instead, various shapes of through holes can be used.

  As illustrated in FIG. 14, the filter 43 has a through hole 644. The through hole 644 has an inlet 644a facing the case 41 and an outlet 644b facing the wall member 21. The inner surface 644c of the through hole 644 is formed by an inclined surface that gradually increases from the inlet 644a toward the outlet 644b. The inner surface 644c provides a draft for easily separating the inner surface 644c from the carbon fiber bundle 31. In the figure, the draft is slightly exaggerated. The carbon fiber bundle 31 formed by the through hole 644 has a shape that can be called a columnar shape.

  According to this embodiment, the same effect as the preceding embodiment can be obtained. Furthermore, according to this embodiment, the carbon fiber bundle 31 is stably molded.

Seventh Embodiment This embodiment is a modified example based on the preceding embodiment. In the above embodiment, the through hole 644 has a draft angle. Instead, a through hole having a shape corresponding to the truncated cone may be used.

  As shown in FIG. 15, the filter 43 has a through hole 744 having a shape corresponding to a truncated cone. The inner surface 744c of the through hole 744 has an inclination angle larger than the draft angle. The inner surface 744c forms a frustoconical carbon fiber bundle 31. The carbon fiber bundle 31 has a small-diameter exposed portion 732 and a large-diameter embedded portion 733. According to this embodiment, the same effect as the preceding embodiment can be obtained. Furthermore, according to this embodiment, the burying portion 733 provides a shape that extends farther in the wall member 21. Thereby, the dropout of the carbon fiber bundle 31 is suppressed. Moreover, the carbon fiber bundle 31 provides a cross-sectional area corresponding to a change in heat conduction in the axial direction, that is, the height direction.

Eighth Embodiment This embodiment is a modification example based on the preceding embodiment. In the above embodiment, the carbon fiber bundle 31 has a cylindrical shape. Instead, carbon fiber bundles 31 having various shapes can be used.

  As illustrated in FIG. 16, the carbon fiber bundle 31 has a plate shape having a rectangular cross section. The carbon fiber bundle 31 provides a planar side surface that extends along the flow direction of the first medium M1. Also in this embodiment, the shape of the carbon fiber bundle 31 is defined by the filter 43.

Ninth Embodiment This embodiment is a modification example based on the preceding embodiment. As shown in FIG. 17, the carbon fiber bundle 31 has a plate shape with a triangular cross section. The carbon fiber bundle 31 provides a cross section in which the width gradually increases along the flow direction of the first medium M1. The carbon fiber bundle 31 extends along the flow direction of the first medium M1, but provides a planar side surface that is slightly inclined with respect to the flow direction. Also in this embodiment, the shape of the carbon fiber bundle 31 is defined by the filter 43.

Tenth Embodiment This embodiment is a modified example based on the preceding embodiment. In the said embodiment, the heat exchange member 11 forms the heat exchanger 10 which provides the heat exchange between the 1st medium M1 and the 2nd medium M2. Instead of this, the heat exchange member 11 may be used for the purpose of exchanging heat only with the first medium M1.

  As illustrated in FIG. 18, the heat exchange member 11 provides a container for the device A10 that requires temperature adjustment. An example of the device A10 is an electrical component that requires heat dissipation. An example of the electrical component is a semiconductor component. The device A10 is, for example, a semiconductor switching element for controlling high power. Also in this embodiment, the heat exchange member 11 has the base material 20 and the fin group 30. The base material 20 is a mold resin that wraps electrical components. The fin group 30 includes a plurality of carbon fiber bundles 31 described in the preceding embodiment. In this embodiment, the first medium M1 is the only heat transport medium. The first medium M1 is a fluid such as low-temperature air, for example. According to this embodiment, high heat transfer is realized between the first medium M1 and the substrate 20.

(Other embodiments)
The disclosure in this specification is not limited to the illustrated embodiments. The disclosure encompasses the illustrated embodiments and variations by those skilled in the art based thereon. For example, the disclosure is not limited to the combinations of parts and / or elements shown in the embodiments. The disclosure can be implemented in various combinations. The disclosure may have additional parts that can be added to the embodiments. The disclosure includes those in which parts and / or elements of the embodiments are omitted. The disclosure encompasses the replacement or combination of parts and / or elements between one embodiment and another. The technical scope disclosed is not limited to the description of the embodiments. Some technical scope disclosed is indicated by the description of the claims, and should be understood to include all modifications within the meaning and scope equivalent to the description of the claims. .

  In the above embodiment, a tank-and-tube heat exchanger is illustrated. Instead, the disclosure can be applied to various heat exchangers such as a drone cup type and a shell-and-tube type. Moreover, in the said embodiment, the fin group 30 is provided in the tube. Instead, the fin group 30 can be provided on the surface of various portions that can contribute to heat exchange. For example, the fin group 30 may be provided on the surface of the tank. The fin group 30 may be provided on the surface of the pipe. Further, the fin group 30 may be provided on the inner surface of the wall member 21 so as to exchange heat with the second medium M2. For example, the carbon fiber bundle 31 may be provided so as to protrude into the second flow path 23 in FIG.

  In the above embodiment, the carbon fiber bundle 31 is perpendicular to the flow direction of the wall member 21 and the first medium M1. Instead, the carbon fiber bundle 31 may be arranged so as to form an acute angle or an obtuse angle with respect to the flow direction of the wall member 21 or the first medium M1.

  In the said embodiment, the wall member 21 is formed with a thermoplastic resin, and carbon fiber can be stabbed by heating. Instead of this, a soft resin layer capable of being stabbed with carbon fibers may be formed on the surface of the wall member 21, and the resin layer may be cured after being stabbed with carbon fibers. The soft resin layer may be formed by applying a resin.

  In the above embodiment, a high voltage is applied to the plurality of carbon fibers 42, and a high voltage having a reverse polarity is applied to the wall member 21. Instead, a high voltage may be applied to one of the plurality of carbon fibers 42 and the wall member 21 and the other may be set to the ground potential.

10 heat exchanger, 11 heat exchange member, A10 electrical component,
20 substrate,
21 wall member, 22 1st flow path, 23 2nd flow path, 424 wall member,
30 fins,
31 Carbon fiber bundle (fin), 32, 732 exposed portion,
33, 233, 333, 533, 733 buried part,
40 manufacturing equipment,
41 cases, 42 carbon fibers, 43 filters,
44, 644, 744 through hole, 45, 46 high voltage power supply,
M1 first medium, M2 second medium.

Claims (13)

A resin wall member (21) forming a flow path (22) for flowing a heat medium;
A carbon fiber bundle (31) formed of a plurality of carbon fibers and having an exposed portion (32) exposed in the heat medium (M1) and an embedded portion (33) embedded in the wall member (21). A heat exchange member provided.   The heat exchange member according to claim 1, wherein the carbon fiber is an anisotropic pitch-based carbon fiber that exhibits high thermal conductivity along the longitudinal direction.   The heat exchange member according to claim 1 or 2, wherein the carbon fiber bundle is formed perpendicular to a surface of the wall member.   The heat exchange member according to any one of claims 1 to 3, wherein a thickness (DF) of the carbon fiber bundle perpendicular to the flow direction of the heat medium is 5 µm or more and 40 µm or less.   The heat exchange member according to claim 4, wherein an axial height (HF) of the carbon fiber bundle perpendicular to the flow direction of the heat medium is 500 times or less of the thickness.   The heat exchange member according to claim 1, wherein the heat exchange member forms a heat exchanger that provides heat exchange between the two heat media.   The heat exchange member according to any one of claims 1 to 5, wherein a container for housing the device is formed. In the manufacturing method of the heat exchange member in any one of Claims 1-7,
Forming a soft layer capable of piercing the carbon fiber in the wall member; and
Production of a heat exchange member comprising: moving a carbon fiber toward the wall member by applying a high voltage between the plurality of carbon fibers and the wall member; and piercing the carbon fiber into the soft layer Method.   Furthermore, the manufacturing method of the heat exchange member of Claim 8 including orienting the said some carbon fiber perpendicularly | vertically with respect to the surface of the said wall member by the said high voltage.   Furthermore, the manufacturing method of the heat exchange member of Claim 8 or 9 including hardening the said soft layer and fixing the said carbon fiber bundle to the said wall member.   The method for manufacturing a heat exchange member according to any one of claims 8 to 10, further comprising defining the shape of the carbon fiber bundle by restricting the carbon fibers reaching the wall member.   The method for producing a heat exchange member according to any one of claims 8 to 11, comprising applying a high voltage to the plurality of carbon fibers and applying a reverse high voltage to the wall member.   The method for producing a heat exchange member according to any one of claims 8 to 11, comprising applying a high voltage to one of the plurality of carbon fibers and the wall member and setting the other to a ground potential.

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