JP2017154236A - Manufacturing method of heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a heat exchanger capable of efficiently performing processing for removing burrs produced on cut end parts of linear bodies.SOLUTION: A manufacturing method of a MCM heat exchanger 10 including: a plurality of linear bodies 12 composed of magnetocaloric effect material exhibiting magnetocaloric effect; and a cylindrical case 13 to which a bundle of the plurality of linear bodies 12 is inserted includes a process of cutting the bundle of linear material L to a length of the linear bodies 12 on the outer side of a linear body storage part 13A while inserting the bundle of the linear material L composed of the magnetocaloric effect material to the linear body storage part 13A constituting a part of the case 13 and immersing cut end parts of the bundle of the linear bodies 12 into a dissolution liquid 300 to dissolve the cut end parts.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a method of manufacturing a heat exchanger having a linear body made of a magnetocaloric effect material.

  As a heat exchanger having a magnetic body that exhibits a magnetocaloric effect, a plurality of linear magnetic bodies (hereinafter referred to as linear bodies) made of a magnetocaloric effect material intersect with the longitudinal direction of the linear body. It is known that an aggregate is formed by overlapping in the direction, and the aggregate is inserted into a cylindrical case (for example, see Patent Document 1).

JP 2013-64588 A

  When the heat exchanger is manufactured, a step of cutting a wire made of a material that exhibits a magnetocaloric effect (hereinafter referred to as a magnetocaloric effect material) into the length of the linear body is performed. In this step, when a burr is generated at the cut end portion of the linear body, it is necessary to remove the burr in order to prevent the burr from blocking the flow path in the heat exchanger. Here, there are a large number of linear bodies to be inserted into the heat exchanger, and the processing time can be reduced by efficiently removing the burrs generated at the cut ends of the numerous linear bodies. Need to shorten.

  The problem to be solved by the present invention is to provide a method of manufacturing a heat exchanger that can efficiently carry out a process of removing burrs generated at the cut end of a linear body.

[1] A method of manufacturing a heat exchanger according to the present invention includes a cylindrical shape in which a plurality of linear bodies made of a magnetocaloric effect material exhibiting a magnetocaloric effect and a bundle of the plurality of linear bodies are inserted. A heat exchanger comprising a case, wherein a bundle of wires made of the magnetocaloric effect material is inserted into a linear body accommodating portion or a part of the case. Then, on the outside of the linear body housing part or the case, the bundle of wire rods is cut to the length of the linear body, and the cut end portion of the bundle of linear bodies is immersed and dissolved in a solution. .

[2] In the above invention, the melted cut end of the bundle of linear bodies may be washed.

[3] In the above invention, the solution may be nitric acid, hydrochloric acid, a mixture of nitric acid and hydrochloric acid, or a diluted solution thereof.

  In the present invention, burrs generated at the cut ends of a plurality of linear bodies can be removed simultaneously by immersing the cut ends of the bundle of linear bodies in the solution. Thereby, the process which removes the burr | flash which arose in the cutting | disconnection edge part of a linear body can be implemented efficiently.

FIG. 1 is a diagram illustrating an overall configuration of a magnetic heat pump apparatus including an MCM heat exchanger manufactured by a manufacturing method according to an embodiment of the present invention, and illustrates a state where a piston is in a first position. . FIG. 2 is a diagram illustrating an overall configuration of a magnetic heat pump apparatus including an MCM heat exchanger manufactured by a manufacturing method according to an embodiment of the present invention, and is a diagram illustrating a state where a piston is in a second position. . FIG. 3 is an exploded perspective view showing the configuration of the MCM heat exchanger manufactured by the manufacturing method according to one embodiment of the present invention. FIG. 4 is a cross-sectional view along the extending direction of the MCM heat exchanger manufactured by the manufacturing method according to one embodiment of the present invention. FIG. 5 is a cross-sectional view taken along line VV in FIG. FIG. 6 is a diagram for explaining a method of manufacturing the MCM heat exchanger according to one embodiment of the present invention. FIG. 7 is a diagram for explaining a manufacturing method of the MCM heat exchanger according to an embodiment of the present invention. FIGS. 8A and 8B are views for explaining a method for manufacturing an MCM heat exchanger according to an embodiment of the present invention. 9A to 9C are views for explaining a method for manufacturing the MCM heat exchanger according to the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 are diagrams showing the overall configuration of a magnetic heat pump apparatus 1 including first and second MCM heat exchangers 10 and 20 manufactured by the manufacturing method of the present invention. 3-5 is a figure which shows the 1st and 2nd MCM heat exchangers 10 and 20 in this embodiment.

  The magnetic heat pump device 1 in the present embodiment is a heat pump device using a magnetocaloric effect, and as shown in FIGS. 1 and 2, first and second MCM heat exchangers 10 and 20, The piston 30, the permanent magnet 40, the low temperature side heat exchanger 50, the high temperature side heat exchanger 60, the pump 70, the pipes 81 to 84, and the switching valve 90 are provided.

  As shown in FIG. 3 and FIG. 4, the first MCM heat exchanger 10 is connected to an assembly 11 composed of a plurality of linear bodies 12, a case 13 through which the aggregate 11 is inserted, and the case 13. The first adapter 16 and the second adapter 17 are provided. Since the first MCM heat exchanger 10 and the second MCM heat exchanger 20 have the same configuration, only the configuration of the first MCM heat exchanger 10 will be described below and the second MCM The description of the configuration of the heat exchanger 20 is omitted, and the description of the configuration of the first MCM heat exchanger 10 is used. Moreover, in FIGS. 3-5, the 1st MCM heat exchanger 10 is shown, and about the 2nd MCM heat exchanger 20, it attaches to the code | symbol corresponding with a parenthesis, and abbreviate | omits illustration.

  The linear body 12 is a wire having a circular cross-sectional shape made of a magnetocaloric effect material (MCM) that exhibits a magnetocaloric effect. When a magnetic field is applied to the linear body 12 composed of the MCM, the magnetic entropy is reduced by aligning the electron spin, and the linear body 12 generates heat and the temperature rises. On the other hand, when the magnetic field is removed from the linear body 12, the electron spin becomes messy and the magnetic entropy increases, and the linear body 12 absorbs heat and the temperature decreases.

  Although MCM which comprises this linear body 12 will not be specifically limited if it is a magnetic body, For example, it is preferable that it is a magnetic body which expresses a high magnetocaloric effect in normal temperature range. Specific examples of such MCMs include gadolinium (Gd), gadolinium alloys, lanthanum-iron-silicon (La-Fe-Si) compounds, and the like.

  The assembly 11 is constituted by a bundle of a plurality of linear bodies 12 arranged in parallel to each other. The side surfaces of the adjacent linear bodies 12 are in contact with each other, and as a result, a flow path is formed between them. For ease of understanding, FIG. 3 and FIG. 5 show the assembly 11 composed of the linear bodies 12 having a smaller number than the actual number. The aggregate 11 is composed of several hundred linear bodies 12.

  Although it does not specifically limit as a wire diameter of the linear body 12, For example, it is preferable that it is 0.02-10 mm. At this time, the plurality of linear bodies 12 constituting the aggregate 11 may have substantially the same wire diameter, or may have a mixture of different wire diameters.

  The assembly 11 of the linear bodies 12 is inserted through the case 13. As shown in FIGS. 3 to 5, the case 13 has a rectangular cylindrical shape. A first opening 131 and a second opening 132 are respectively formed at one end and the other end of the case 13 in the axial direction. The linear body 12 extends linearly, and the extending direction of the linear body 12 coincides with the axial direction of the case 13. Further, the centers of the first and second openings 131 and 132 are located coaxially with the center of the assembly 11.

  The length of the linear body 12 is larger than the length in the axial direction of the case 13, and both ends of the plurality of linear bodies 12 constituting the aggregate 11 are connected to the case 13 from both axial ends of the case 13. Extends outside. Here, burr is not present at the end of the linear body 12 due to the acid treatment described later. A plurality of linear bodies 12 may be twisted together. In this case, a large number of linear bodies 12 constituting the aggregate 11 may be divided into groups of two or three, and the two or three linear bodies 12 of each group may be twisted together.

  The case 13 includes a linear body housing portion 13A having a U-shaped cross section in a cross section orthogonal to the axial direction, and a rectangular plate-shaped lid portion 13B. The linear body housing portion 13 </ b> A includes a bottom portion 13 </ b> C that constitutes the bottom portion of the case 13 and a pair of wall portions 13 </ b> D that constitute side wall portions on both sides of the case 13. By fixing the end portion in the width direction of the lid portion 13B to the upper end of the wall portion 13D, the upper portion of the linear body accommodating portion 13A is closed by the lid portion 13B.

  As shown in FIG. 3, the first adapter 16 is connected to the first opening 131 of the case 13, and the second adapter 17 is connected to the second opening 132. As the first and second adapters 16 and 17, for example, heat shrinkable tubes, resin molded products, metal processed products, or the like can be used.

  The first adapter 16 has a first connection port 161 on the side opposite to the side connected to the first opening 131. The first connection port 161 communicates with the low temperature side heat exchanger 50 via the first low temperature side pipe 81. The second adapter 17 also has a second connection port 171 on the side opposite to the side connected to the second opening 132. The second connection port 171 communicates with the high temperature side heat exchanger 60 via the first high temperature side pipe 83. The centers of the first and second connection ports 161 and 171 are located coaxially with the center of the assembly 11.

  Similarly, a case 21 of the second MCM heat exchanger 20 also accommodates an aggregate 21 composed of a plurality of linear bodies 22. As with the first MCM heat exchanger 10, the third adapter 26 is connected to the third opening 231 of the case 23, and the fourth adapter 27 is connected to the fourth opening 232 of the case 23. Has been. The second MCM heat exchanger 20 communicates with the low temperature side heat exchanger 50 via a second low temperature side pipe 82 connected to the third connection port 261 of the third adapter 26. On the other hand, the second MCM heat exchanger 20 communicates with the high temperature side heat exchanger 60 via the second high temperature side pipe 84 connected to the fourth connection port 271 of the fourth adapter 27. .

  In the present embodiment, the linear body 22 of the second MCM heat exchanger 20 has the same configuration as the linear body 12 of the first MCM heat exchanger 10. The assembly 21 of the linear bodies 22 of the second MCM heat exchanger 20 has the same configuration as the assembly 11 of the linear bodies 12 of the first MCM heat exchanger 10. Furthermore, the case 23 of the second MCM heat exchanger 20 has the same configuration as the case 13 of the first MCM heat exchanger 10.

  For example, as shown in FIG. 1 and FIG. 2, when the air conditioner using the magnetic heat pump device 1 according to the present embodiment is caused to function as cooling, heat is generated between the low temperature side heat exchanger 50 and indoor air. The room is cooled by exchanging, and heat is radiated to the outside by exchanging heat between the high temperature side heat exchanger 60 and the outside.

  On the other hand, when making the said air conditioning apparatus function as heating, while heat-exchanging between the high temperature side heat exchanger 60 and indoor air, a room is warmed, and the low temperature side heat exchanger 50 and outdoor Heat is absorbed from the outside by exchanging heat with air.

  As described above, a circulation path including the four MCM heat exchangers 10, 20, 50, 60 is formed by the two low temperature side pipes 81, 82 and the two high temperature side pipes 83, 84. A liquid medium is pumped into the circulation path. Specific examples of the liquid medium include liquids such as water, antifreeze, ethanol solution, or a mixture thereof.

  The two MCM heat exchangers 10 and 20 are accommodated inside the piston 30. The piston 30 can reciprocate between the pair of permanent magnets 40 by an actuator 35. Specifically, the piston 30 can reciprocate between a “first position” as shown in FIG. 1 and a “second position” as shown in FIG. . In addition, as an example of the actuator 35, an air cylinder etc. can be illustrated, for example.

  Here, the “first position” refers to a piston in which the first MCM heat exchanger 10 is not interposed between the permanent magnets 40 and the second MCM heat exchanger 20 is interposed between the permanent magnets 40. 30 positions. On the other hand, the “second position” is a piston in which the first MCM heat exchanger 10 is interposed between the permanent magnets 40 and the second MCM heat exchanger 20 is not interposed between the permanent magnets 40. 30 positions.

  Note that the permanent magnet 40 may be reciprocated by the actuator 35 instead of the first and second MCM heat exchangers 10 and 20. Alternatively, an electromagnet having a coil may be used in place of the permanent magnet 40. In this case, the first and second MCM heat exchangers 10 and 20 or a mechanism for moving the magnet becomes unnecessary. When an electromagnet having a coil is used, it is applied to the linear bodies 12 and 22 instead of applying / removing the magnetic field to / from the linear bodies 12 and 22 of the first and second MCM heat exchangers 10 and 20. The magnitude of the magnetic field may be changed.

  The switching valve 90 is provided in the first high temperature side pipe 83 and the second high temperature side pipe 84. The switching valve 90 switches the liquid medium supply destination to the first MCM heat exchanger 10 or the second MCM heat exchanger 20 by the pump 70 in conjunction with the operation of the piston 30 described above, The connection destination of the high temperature side heat exchanger 60 is switched to the second MCM heat exchanger 20 or the first MCM heat exchanger 10.

  Next, operation | movement of the magnetic heat pump apparatus 1 in this embodiment is demonstrated.

  First, when the piston 30 is moved to the “first position” shown in FIG. 1, the linear body 12 of the first MCM heat exchanger 10 is demagnetized to lower the temperature, while the second MCM heat exchange is performed. The linear body 22 of the vessel 20 is magnetized and the temperature rises.

  At the same time, the switching valve 90 causes the pump 70 → the first high temperature side pipe 83 → the first MCM heat exchanger 10 → the first low temperature side pipe 81 → the low temperature side heat exchanger 50 → the second low temperature side pipe. A first path consisting of 82 → second MCM heat exchanger 20 → second high temperature side pipe 84 → high temperature side heat exchanger 60 → pump 70 is formed.

  Therefore, the liquid medium is cooled by the linear body 12 of the first MCM heat exchanger 10 whose temperature has decreased due to demagnetization, and the liquid medium is supplied to the low-temperature side heat exchanger 50, so that the low-temperature side heat exchanger 50 is cooled.

  On the other hand, the liquid medium is heated by the linear body 22 of the second MCM heat exchanger 20 that has been magnetized and the temperature has risen, and the liquid medium is supplied to the high-temperature side heat exchanger 60, so that the high-temperature side heat exchange is performed. The vessel 60 is heated.

  Next, when the piston 30 is moved to the “second position” shown in FIG. 2, the linear body 12 of the first MCM heat exchanger 10 is magnetized to increase the temperature, while the second MCM heat is increased. The linear body 22 of the exchanger 20 is demagnetized and the temperature decreases.

  At the same time, the switching valve 90 causes the pump 70 → second high temperature side pipe 84 → second MCM heat exchanger 20 → second low temperature side pipe 82 → low temperature side heat exchanger 50 → first low temperature side pipe. A second path consisting of 81 → first MCM heat exchanger 10 → first high temperature side pipe 83 → high temperature side heat exchanger 60 → pump 70 is formed.

  For this reason, the liquid medium is cooled by the linear body 22 of the second MCM heat exchanger 20 whose temperature has decreased due to demagnetization, and the liquid medium is supplied to the low temperature side heat exchanger 50, so that the low temperature side heat exchanger is provided. 50 is cooled.

  On the other hand, the liquid medium is heated by the linear body 12 of the first MCM heat exchanger 10 that has been magnetized and the temperature has risen, and the liquid medium is supplied to the high-temperature side heat exchanger 60 to perform the high-temperature side heat exchange. The vessel 60 is heated.

  The reciprocating movement between the “first position” and the “second position” of the piston 30 described above is repeated, and the linear bodies 12 in the first and second MCM heat exchangers 10 and 20 are repeated. , 22 is repeatedly applied and removed, the cooling of the low temperature side heat exchanger 50 and the heating of the high temperature side heat exchanger 60 are continued.

  Hereinafter, the manufacturing method of the 1st and 2nd MCM heat exchangers 10 and 20 is demonstrated. 6-9 is a figure for demonstrating the manufacturing method of the 1st MCM heat exchanger 10. FIG. In addition, since the manufacturing method of the 1st MCM heat exchanger 10 and the 2nd MCM heat exchanger 20 is the same, the manufacturing method of the 1st MCM heat exchanger 10 is demonstrated, 2nd MCM heat exchange Description of the manufacturing method of the vessel 20 is omitted, and the description of the manufacturing method of the first MCM heat exchanger 10 is incorporated.

  First, as shown in FIG. 6, the process which inserts the wire L in the some linear body accommodating part 13A using the wire winding apparatus 100 is implemented. The wire rod winding device 100 includes a spool 102, a winding shaft 104, and a traverse 106. The spool 102 is supported by the take-up shaft 104 and is rotated together with the take-up shaft 104 by a drive mechanism (not shown).

  The spool 102 includes a plurality of (for example, six as shown) radiating portions 102A extending radially outward from the center of rotation. The plurality of radiating portions 102 </ b> A are arranged at equal intervals in the rotation direction of the spool 102. An attachment portion 102B to which the linear body accommodating portion 13A is detachably attached is provided at the distal end of the radiating portion 102A. The mounting portion 102B is provided with a fixing mechanism (not shown), and the linear body housing portion 13A is detachably fixed to the mounting portion 102B by this fixing mechanism.

  In the linear body accommodating portion 13A, the longitudinal direction of the bottom portion 13C is parallel to the direction orthogonal to the radial direction of the spool 102, and a pair of wall portions 13D rises from the bottom portion 13C to the radially outer side of the spool 102, The first opening 131 and the second opening 132 are fixed to the mounting portion 102 </ b> B so as to open in a direction perpendicular to the radial direction of the spool 102.

  The traverse 106 includes a holding portion 106 </ b> A that holds the wire L on the upstream side of the spool 102. The holding portion 106A is supported so as to be movable in the axial direction of the spool 102 by a moving mechanism (not shown). The position where the wire L is wound around the spool 102 is adjusted by moving the holding portion 106A in the axial direction of the spool 102 by the moving mechanism.

  In this step, the winding shaft 104 and the spool 102 are rotated in a state where the tip of the wire L is fixed to the spool 102 and the plurality of linear body accommodating portions 13A are attached to the attachment portion 102B. At this time, the position where the wire L is wound around the spool 102 is traversed so that the wire L is juxtaposed in the width direction of the bottom portion 13C and in the height direction of the wall portion 13D in the linear body housing portion 13A. Adjust by 106.

  Next, as shown in FIGS. 7, 8 </ b> A, and 8 </ b> B, a step of cutting the wire L using the wire-cutting cutter 200 is performed. In this step, a bundle of a plurality of linear bodies 12 is obtained by cutting a bundle of wire rods L with the cutter 200 between the adjacent linear body accommodating portions 13A. At this time, the bundle of the wire L is cut by moving the cutter 200 in one direction orthogonal to the bundle of the wire L. Therefore, a burr 12 </ b> B protruding in the moving direction of the cutter 200 is formed at the cut end of the linear body 12.

  Next, as shown in FIGS. 9A to 9C, a step of removing the burr 12B of the linear body 12 is performed. In this step, as shown in FIGS. 9A and 9B, the cut ends of the bundle of the plurality of linear bodies 12 are immersed in the solution 300 for a predetermined time. Examples of the solution 300 include strong acids such as nitric acid and hydrochloric acid, a mixture of nitric acid and hydrochloric acid, or a diluted solution obtained by diluting them with water. Here, the solution 300 is prepared and the predetermined time is set so that the surface of the cut end portion of the linear body 12 can be dissolved by the solution 300 and the burr 12B can be removed.

  After the predetermined time has elapsed, as shown in FIG. 9C, the cut ends of the bundles of the plurality of linear bodies 12 are taken out from the solution 300, and the cut ends of the bundles of the plurality of linear bodies 12 are removed. Wash with cleaning solution. An example of the cleaning liquid used for the linear body 12 made of a material having a high rust prevention property such as gadolinium or a gadolinium alloy is water. On the other hand, as the cleaning liquid used for the linear body 12 made of a material having low rust prevention properties such as a lanthanum-iron-silicon (La-Fe-Si) compound, an aqueous solution of a rust inhibitor may be exemplified. it can.

  The manufacturing method of the first MCM heat exchangers 10 and 20 according to this embodiment has the following effects. In addition, since the effect of the manufacturing method of the 2nd MCM heat exchanger 20 is the same as the effect of the manufacturing method of the 1st MCM heat exchanger 10, duplication description is abbreviate | omitted and the 1st MCM heat exchanger is omitted. The description about the manufacturing method of 10 is used.

  In the present embodiment, the bundle of the wire rods L is formed of the MCM, and the bundle of the wire rods L is inserted into the wire body housing portion 13 </ b> A constituting a part of the case 13. A bundle of a plurality of linear bodies 12 is formed by cutting on the outside and immersing the cut ends of the cut bundles of the wire L in the solution 300 to dissolve them. Thereby, the burr | flash of the cutting | disconnection edge part of many linear bodies 12 can be removed simultaneously in the state which penetrated the several linear bodies 12 to the linear body accommodating part 13A, and was bundled. Therefore, the process which removes the burr | flash which arose in the cutting | disconnection edge part of many linear bodies 12 can be implemented efficiently, and the working time of the said process can be shortened.

  Moreover, in this embodiment, the melt | dissolution liquid is removed from a cutting | disconnection edge part by wash | cleaning the cutting | disconnection edge part which the linear body 12 was melt | dissolved. Thereby, the progress of dissolution at the cut end of the linear body 12 after removing the burrs can be prevented.

  The “first MCM heat exchanger 10” and the “second MCM heat exchanger 20” in the above embodiment correspond to an example of the “heat exchanger” in the present invention, and the “linear body” in the above embodiment. 12 ”and“ linear body 22 ”correspond to an example of“ linear body ”in the present invention, and“ case 13 ”and“ case 23 ”in the above-described embodiment correspond to an example of“ case ”in the present invention. . In addition, the “wire L” in the above-described embodiment corresponds to an example of the “wire” in the present invention, and the “linear body housing portion 13A” in the above-described embodiment is an example of the “wire body housing portion” in the present invention. The “dissolving liquid 300” in the above-described embodiment corresponds to an example of the “dissolving liquid” in the present invention.

  The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment includes all design changes and equivalents belonging to the technical scope of the present invention.

  For example, in the above-described embodiment, the cutting step and the burr removal processing step are performed in a state where the bundle of the wire L is inserted through the case 13 without the lid portion 13B (that is, the linear body accommodating portion 13A). However, the cutting step and the burr removal processing step may be performed in a state where the bundle of the wire L is inserted through the case 13 in a state where the lid portion 13B is attached to the linear body housing portion 13A. In the above-described embodiment, the cylindrical case 13 having a rectangular cross section is illustrated, but a cylindrical case 13 having a polygonal cross section, a cylindrical case 13 or the like may be used.

  In the above-described embodiment, nitric acid, hydrochloric acid, or a mixture of nitric acid and hydrochloric acid is exemplified as the solution 300. However, as long as it has a dissolving power to dissolve burrs at the cut end of the linear body 12. Can be appropriately selected. Moreover, in the above-described embodiment, water and an aqueous solution of a rust inhibitor are exemplified as the cleaning liquid. However, the cleaning liquid can be appropriately selected as long as the solution adhering to the linear body 12 can be removed and the linear body 12 is not corroded. Is possible.

  Moreover, the structure of the magnetic heat pump apparatus mentioned above is an example, and you may apply the heat exchanger manufactured with the manufacturing method which concerns on this invention to other magnetic heat pump apparatuses, such as an AMR (Active Magnetic Refrigerataion) system.

DESCRIPTION OF SYMBOLS 1 ... Magnetic heat pump apparatus 10 ... 1st MCM heat exchanger 11 ... Aggregate 12 ... Linear body 13 ... Case 13A ... Linear body accommodating part 13B ... Cover Part 13C ... Bottom 13D ... Wall 131 ... First opening 132 ... Second opening 16 ... First adapter 161 ... First connection port 17 ... First Second adapter 171 ... second connection port 20 ... second MCM heat exchanger 21 ... assembly 22 ... linear body 23 ... case 231 ... third opening 232 ... 4th opening 26 ... 3rd adapter 261 ... 3rd connection port 27 ... 4th adapter 271 ... 4th connection port 30 ... Piston 35 ... Actuator 40 ... Permanent magnet 50 ... Low temperature side heat exchanger 60 ... High temperature side heat exchanger 70 ..Pump 81... First low temperature side pipe 82... Second low temperature side pipe 83... First high temperature side pipe 84. ... Wire winding device 102 ... Spool 102A ... Radiation portion 102B ... Mounting portion 104 ... Winding shaft 106 ... Traverse 200 ... Cutter 300 ... Solution L ... ·wire

Claims (3)

A method of manufacturing a heat exchanger comprising a plurality of linear bodies made of a magnetocaloric effect material that exhibits a magnetocaloric effect, and a cylindrical case through which a bundle of the plurality of linear bodies is inserted,
In a state where a bundle of wire rods made of the magnetocaloric effect material is inserted through the linear body housing portion or the case constituting a part of the case, outside the linear body housing portion or the case, Cutting the bundle of wires into lengths of the linear bodies,
A method for manufacturing a heat exchanger, wherein the cut end of the bundle of linear bodies is immersed and dissolved in a solution. It is a manufacturing method of the heat exchanger of Claim 1, Comprising:
A method of manufacturing a heat exchanger for cleaning a melted cut end portion of the bundle of linear bodies. It is a manufacturing method of the heat exchanger of Claim 1 or Claim 2,
The manufacturing method of a heat exchanger, wherein the solution is nitric acid, hydrochloric acid, a mixture of nitric acid and hydrochloric acid, or a diluted solution thereof.

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