JP2017072332A - Heat exchanger and magnetic heat pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger which can suppress decrease in heat exchange efficiency.SOLUTION: A first MCM heat exchanger 10 is used for a magnetic heat pump device and comprises an assembly 11 formed by twisting together a plurality of wires 12, and a coating layer 13 that stores the assembly 11, the wire 12 composed of a magneto-caloric effect material having magneto-caloric effect.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a heat exchanger used in a magnetic heat pump device using a magnetocaloric effect, and a magnetic heat pump device including the heat exchanger.

  There is known a heat exchanger including an assembly configured by stacking a plurality of cylindrical magnetic bodies in a direction intersecting the longitudinal direction, and a cylindrical case in which the assembly is inserted ( For example, see Patent Document 1).

JP 2013-64588 A

  In the above heat exchanger, since the aggregate is constituted only by the frictional force between a plurality of magnetic bodies arranged on top of each other, the magnetic bodies move due to the fluid pressure of the liquid medium, and the heat exchange efficiency is reduced. There is a problem of fear.

  The problem to be solved by the present invention is to provide a heat exchanger and a magnetic heat pump device that can suppress a decrease in heat exchange efficiency.

[1] A heat exchanger according to the present invention is a heat exchanger used in a magnetic heat pump device, and includes an assembly configured by twisting a plurality of wires, and a storage unit that stores the assembly. The wire rod is a heat exchanger made of a magnetocaloric effect material having a magnetocaloric effect.

[2] In the above invention, the accommodating portion has a first opening located at one end portion and a second opening located at the other end portion, from the first opening. The direction toward the second opening and the extending direction of the assembly may substantially coincide.

[3] In the above invention, the accommodating portion is filled between a cylindrical portion surrounding the periphery of the assembly, the wire positioned on the outermost periphery of the assembly, and the cylindrical portion. And a filling part.

[4] In the above invention, the plurality of wires may be twisted together by concentric twisting, collective twisting, or composite twisting.

[5] In the above invention, the following expressions (1) and (2) may be satisfied.
1.4 × 10 ≦ A ≦ 2.25 × 10 ⁴ (1)
A = P / R (2)
However, in said (2) type | formula, P is the twist pitch which twists these wire rods, R is the wire diameter of the said wire rod.

[6] The magnetic heat pump device according to the present invention includes at least one heat exchanger, a magnetic field changing unit that applies a magnetic field to the magnetocaloric effect material and changes the magnitude of the magnetic field, and the pipe via a pipe. Fluid is supplied from the heat exchanger to the first or second external heat exchanger in conjunction with the operation of the first and second external heat exchangers respectively connected to the heat exchanger and the magnetic field changing means. And a fluid heat supply device.

  In the present invention, an assembly in which the plurality of wires are held together can be formed by twisting the plurality of wires. Thereby, it can suppress that each wire moves by the fluid pressure of a liquid medium, and can suppress the fall of the heat exchange efficiency of a heat exchanger.

FIG. 1 is a diagram illustrating an overall configuration of a magnetic heat pump device according to an embodiment of the present invention, and is a diagram illustrating a state in which a piston is in a first position. FIG. 2 is a diagram illustrating the overall configuration of the magnetic heat pump device according to the embodiment of the present invention, and is a diagram illustrating a state where the piston is in the second position. FIG. 3 is an exploded perspective view showing the configuration of the MCM heat exchanger according to one embodiment of the present invention. FIG. 4 is a cross-sectional view along the extending direction of the MCM heat exchanger according to the embodiment of the present invention. FIG. 5 is a cross-sectional view taken along line VV in FIG. FIG. 6A is a side view of an assembly according to an embodiment of the present invention, and FIG. 6B is a side view of one wire constituting the assembly according to an embodiment of the present invention. FIG. FIG. 7 is a process diagram showing a method for manufacturing an MCM heat exchanger according to an embodiment of the present invention. FIG. 8 is a cross-sectional view showing a twisting apparatus and a resin extrusion coating apparatus used in the method for manufacturing an MCM heat exchanger according to an 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 according to the present embodiment, FIGS. 3 to 5 are diagrams showing an MCM heat exchanger according to the present embodiment, and FIG. 6 (a) is an embodiment of the present invention. The side view of the aggregate | assembly which concerns on a form, FIG.6 (b) is a side view of the one wire which comprises the aggregate | assembly which concerns on one embodiment of this invention.

  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.

  The “magnetic heat pump device 1” in the present embodiment corresponds to an example of the “magnetic heat pump device” in the present invention, and the “first and second MCM heat exchangers 10 and 20” in the present embodiment are “heat” in the present invention. The “piston 30” and the “permanent magnet 40” in the present embodiment correspond to an example of the “magnetic field changing means” in the present invention, and the “low temperature side heat exchanger 50” in the present embodiment. The “high temperature side heat exchanger 60” corresponds to an example of “first and second external heat exchangers” in the present invention.

  As shown in FIG. 3 and FIG. 4, the first MCM heat exchanger 10 is connected to an aggregate 11 composed of a plurality of wires 12, a coating layer 13 that houses the aggregate 11, and both ends of the coating layer 13. Adapters 16, 17. The “wire 12” in the present embodiment corresponds to an example of the “wire” in the present invention. The “aggregate 11” in the present embodiment corresponds to an example of the “aggregate” in the present invention. The “layer 13” and the “adapter 16, 17” correspond to an example of the “accommodating portion” in the present invention.

  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. The configuration of the MCM heat exchanger 20 will be omitted. Therefore, in FIGS. 3-5, the 1st MCM heat exchanger 10 is shown, About the 2nd MCM heat exchanger 20, illustration is abbreviate | omitted by attaching | subjecting the code | symbol corresponding in a parenthesis.

  The wire 12 is made of a magnetocaloric effect material (MCM) having a magnetocaloric effect. When a magnetic field is applied to the wire 12 composed of this MCM, the magnetic spins are reduced by aligning the electron spin, and the wire 12 generates heat and the temperature rises. On the other hand, when the magnetic field is removed from the wire 12, the electron spin becomes messy and the magnetic entropy increases, and the wire 12 absorbs heat and the temperature decreases.

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

  The wire 12 in the present embodiment is a wire having a circular cross-sectional shape. In addition, as long as the flow path 111 (after-mentioned) can be formed between the said wire 12, when the wires 12 are mutually twisted, the wire 12 may have cross-sectional shapes other than circular.

  The assembly 11 is configured by bundling the plurality of wires 12 in a direction intersecting the longitudinal direction and twisting them together. The side surfaces of the adjacent twisted wires 12 are in contact with each other, and as a result, a flow path 111 is formed between them. In order to facilitate understanding, in the example shown in FIG. 3 and FIG. 5, the aggregate 11 is composed of 19 wires 12, but actually, hundreds to tens of thousands of wires 12 are formed. The bundle 11 is configured by bundling. The outer diameter D (see FIG. 6A) of the aggregate 11 is not particularly limited, but is preferably set to 30 mm or less from the viewpoint of ensuring the magnetic flux density, for example.

  In the aggregate 11 of the present embodiment, the plurality of wire rods 12 are twisted together by collective twisting. In addition, as a method of twisting the plurality of wire rods 12 in the aggregate 11, it is not particularly limited to the above, and concentric twist or composite twist may be used. Collective twisting is a twisting method in which a plurality of wire rods 12 are gathered together and twisted in the same direction around the axis of the aggregate 11. Concentric twisting is a twisting method in which concentric circles are twisted around a plurality of wire rods 12 around the core wire. The composite twist is a twisting method in which a child stranded wire obtained by twisting a plurality of wires 12 into a concentric twist or a collective twist is further twisted into a concentric twist or a collective twist. In addition, the core wire of a concentric twist may be comprised by the one wire rod 12, and may be comprised by twisting the some wire rod 12 together. Further, the direction in which the plurality of wires 12 are twisted together may be rightward or leftward.

  Although it does not specifically limit as wire diameter R (refer FIG.6 (b)) of the wire 12, For example, it is preferable that it is 0.01-1 mm, and it is more preferable that it is 0.02-0.5 mm. At this time, the plurality of wire rods 12 constituting the aggregate 11 may have substantially the same wire diameter, or may have a mixture of different wire diameters. Moreover, when the wire diameter of the wire 12 is set within the above range, the twist pitch P (see FIG. 6B) for twisting the wires 12 is preferably 14 to 450 mm. When the twist pitch P is smaller than the lower limit, the wires are compressed and deformed, and the flow path may be crushed. On the other hand, if the twist pitch P is larger than the above upper limit, the twist may be unwound and the wires may not be held together. Incidentally, in this specification, “twist pitch” refers to the length of the wire 12 in the longitudinal direction while the wire 12 goes around the assembly 11.

Moreover, in this embodiment, it is preferable that the relationship between the twist pitch P and the wire diameter R of the wire 12 is set so that the following formulas (3) and (4) are established.
1.4 × 10 ≦ A ≦ 2.25 × 10 ⁴ (3)
A = P / R (4)

  The aggregate 11 of the wires 12 is covered with a covering layer 13. As shown in FIG. 5, the coating layer 13 includes a cylindrical portion 14 and a filling portion 15. The cylindrical portion 14 surrounds the assembly 11 in a cylindrical shape. On the other hand, the filling portion 15 is filled between the wire 12 a located on the outermost periphery of the assembly 11 and the tubular portion 14, and closes the space between the outermost wire 12 a and the tubular portion 14. . The covering layer 13 is made of, for example, a resin material such as polyvinyl chloride, polyethylene, cross-linked polyethylene, silicone rubber, or fluororesin, and the cylindrical portion 14 and the filling portion 15 are integrally formed. . “Integrally formed” in the present embodiment means that the members are not separated from each other and are formed as an integral structure by the same resin material.

  In addition, as shown in FIG. 4, the coating layer 13 has a first opening 131 located at one end and a second opening 132 located at the other end. A direction CL from the first opening 131 toward the second opening 132 substantially coincides with the extending direction of the assembly 11. Further, the centers of the first and second openings 131 and 132 are located coaxially with the center of the assembly 11.

  The first adapter 16 is connected to the first opening 131 of the covering layer 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 or the like can be used. In addition, as the 1st and 2nd adapters 16 and 17, you may use a resin molded product or may comprise these with a metal material.

  The first adapter 16 has a first coupling port 161 smaller than the first opening 131 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 smaller than the second opening 132 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, the covering layer 23 of the second MCM heat exchanger 20 also covers the aggregate 21 composed of a plurality of wires 22. As with the first MCM heat exchanger 10, the third adapter 26 is connected to the third opening 231 of the covering layer 23, and the fourth adapter 27 is connected to the fourth opening 232 of the covering layer 23. Is connected. 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 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 adapter 27.

  In the present embodiment, the wire 22 of the second MCM heat exchanger 20 has the same configuration as the wire 12 of the first MCM heat exchanger 10. Further, the assembly 21 of the wires 22 of the second MCM heat exchanger 20 has the same configuration as the assembly 11 of the wires 12 of the first MCM heat exchanger 10. Furthermore, the coating layer 23 of the second MCM heat exchanger 20 has the same configuration as the coating layer 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 in 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 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, a mechanism for moving the MCM heat exchangers 10 and 20 or the magnet becomes unnecessary. When using an electromagnet having a coil, the magnitude of the magnetic field applied to the wires 12 and 22 is changed instead of applying / removing the magnetic field to / from the wires 12 and 22 of the MCM heat exchangers 10 and 20. May be.

  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 can be 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 wire 12 of the first MCM heat exchanger 10 is demagnetized and the temperature decreases, while the second MCM heat exchanger 20. The wire 22 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.

  For this reason, the liquid medium is cooled by the wire 12 of the first MCM heat exchanger 10 whose temperature has decreased due to demagnetization, the liquid medium is supplied to the low-temperature side heat exchanger 50, and the low-temperature side heat exchanger 50 is To be cooled.

  At this time, in the first MCM heat exchanger 10, the liquid medium passes through the flow path 111 formed between the side surfaces of the wire 12 and comes into contact with the wire 12. To be cooled. Here, when the liquid medium flows through the flow path 111, a force that pushes the side surface of the wire 12 toward the outside of the flow path 111, or a frictional force is generated between the liquid medium and the side surface of the wire 12, so that the wire 12. May move. On the other hand, in this embodiment, it is suppressing that the wire 12 moves by twisting together the several wire 12 and hold | maintaining the said several wire 12 mutually.

  On the other hand, the liquid medium is heated by the wire 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, and the high temperature side heat exchanger 60. Is heated.

  At this time, the liquid medium passes through the flow path 211 formed between the side surfaces of the wire 22 inside the second MCM heat exchanger 20 and comes into contact with the wire 22, so that the liquid medium is absorbed by the wire 22. Heated. In this case as well, as in the first MCM heat exchanger 10, the liquid medium pumped through the flow path 211 pushes the force pushing the side surface of the wire 22 toward the outside of the flow path 211, or the liquid medium and the wire 22 There is a possibility that the wire rod 22 may move due to the frictional force generated between the side surface and the side surface. On the other hand, in this embodiment, since the some wire 22 is twisted together and the said some wire 22 is mutually hold | maintained, it can suppress that the wire 22 moves.

  Next, when the piston 30 is moved to the “second position” shown in FIG. 2, the wire 12 of the first MCM heat exchanger 10 is magnetized and the temperature rises, while the second MCM heat exchanger The 20 wires 22 are demagnetized and the temperature is lowered.

  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 wire 22 of the second MCM heat exchanger 20 whose temperature has decreased due to demagnetization, the liquid medium is supplied to the low temperature side heat exchanger 50, and the low temperature side heat exchanger 50 is To be cooled.

  At this time, the fluid medium passes through the flow path formed between the side surfaces of the wire 22 inside the second MCM heat exchanger 20 and comes into contact with the wire 22, so that the liquid medium is cooled by the wire 22. Is done. Here, when the cooling medium flows through the flow path 211, a force that pushes the side surface of the wire 22 toward the outside of the flow path 211 or a frictional force is generated between the liquid medium and the side surface of the wire 22, thereby causing the wire 22. May move. On the other hand, in this embodiment, the wire 22 is restrained from moving by twisting together the wire 22 and holding the wires 22 together.

  On the other hand, the liquid medium is heated by the wire 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, and the high temperature side heat exchanger 60. Is heated.

  At this time, in the first MCM heat exchanger 10, the liquid medium passes through the flow path 111 formed between the side surfaces of the wire 12 and comes into contact with the wire 12. Heated. Also in this case, as in the second MCM heat exchanger 20, the liquid medium pumped through the flow path 111 pushes the side surface of the wire 12 toward the outside of the flow path 111, or the liquid medium and the wire 12 There is a possibility that the wire 12 may move due to the frictional force generated between the side surface and the side surface of the wire. On the other hand, in this embodiment, since the some wire 12 is twisted together and the said some wire 12 is mutually hold | maintained, it can suppress that the wire 12 moves.

  Then, the reciprocating movement between the “first position” and the “second position” of the piston 30 described above is repeated, and the wires 12 and 22 in the first and second MCM heat exchangers 10 and 20 are repeated. By repeating the application / removal of the magnetic field, the cooling of the low temperature side heat exchanger 50 and the heating of the high temperature side heat exchanger 60 are continued.

  Below, the manufacturing method of the heat exchanger in this embodiment is demonstrated, referring FIG.7 and FIG.8. FIG. 7 is a process diagram showing a method for manufacturing an MCM heat exchanger according to an embodiment of the present invention, and FIG. 8 is a twisting apparatus used in the method for manufacturing an MCM heat exchanger according to an embodiment of the present invention. It is sectional drawing which shows a resin extrusion coating apparatus.

  In addition, since the 1st MCM heat exchanger 10 and the 2nd MCM heat exchanger 20 have the same structure, only the manufacturing method of the 1st MCM heat exchanger 10 is demonstrated below, and 2nd The manufacturing method of the MCM heat exchanger will be omitted.

  First, in step S10 of FIG. 7, the assembly 11 is formed by twisting a plurality of wire rods 12 (first step).

  Specifically, first, powdery MCM is put into a mold and formed into a cylindrical shape by sintering, and then the cylindrical member is stretched in a linear shape to form the wire 12. In addition, the formation method of the wire 12 is not specifically limited to the above, You may extend the said cylindrical member linearly after shape | molding the cast material in the column shape.

  Next, the aggregate 11 is formed by twisting a plurality of wires 12 (second step). Here, first, the prepared plurality of wires 12 are bundled in a direction intersecting the longitudinal direction of the wires 12. Then, the bundled wires 12 are twisted together. As described above, various twisting methods exist, but when twisting a plurality of wire rods 12, known methods can be adopted for these twisting methods.

  For example, you may use the twisting apparatus 160 which twists the wire 12 sent out from the some delivery bobbin 170 around which the wire 12 was wound as shown in FIG. In this case, the twisting device 160 has a twisting control plate (not shown) in which a plurality of insertion holes (not shown) are formed, and the wire 12 sent from the delivery bobbin 170 to each of the plurality of insertion holes. Then, the assembly 11 in which the plurality of wire rods 12 are twisted together can be formed by rotating the twisting control plate along a predetermined twisting direction.

  Next, in step S20 of FIG. 7, the aggregate 11 is coated with the coating layer 13 using the resin extrusion coating apparatus 100 as shown in FIG.

  A molding die 130 including a nipple 140 and a die 150 is attached to the cross head 120 of the resin extrusion coating apparatus 100. The nipple 140 has an insertion hole 141 through which the assembly 11 passes. The nipple 140 is disposed in the insertion hole 151 of the die 150, and a flow path 152 through which the molten resin MR passes is formed between the nipple 140 and the die 150.

  The molten resin MR heated and kneaded by the extrusion device 110 is supplied to the cross head 120. The assembly 11 passes through the insertion hole 141 of the nipple 140, and the molten resin MR passes through the flow path 152 and is pushed out so as to cover the outer periphery of the assembly 11. And the coating layer 13 is formed by the said molten resin MR being cooled immediately after extrusion. The method for cooling the molten resin MR may be air cooling or water cooling.

  When the resin is extruded, the molten resin MR surrounds the outer periphery of the assembly 11, so that the cylindrical portion 14 of the coating layer 13 is formed. At the same time, the molten resin MR is in close contact with the wire 12 a located on the outermost periphery of the aggregate 11, whereby the filling portion 15 of the coating layer 13 is formed.

  Next, in step S30 of FIG. 7, the aggregate 11 covered with the coating layer 13 is cut into a predetermined length. Next, one end of the coating layer 13 and the first low temperature side pipe 81 are connected by the first adapter 16, and the other end of the coating layer 13 and the first high temperature side pipe 83 are connected to the first adapter 16. Two adapters 17 are connected. Thereby, the 1st MCM heat exchanger 10 is completed. If the wire 12 has a predetermined length in advance, the cutting step in step S30 is not necessary.

  As described above, in the present embodiment, the coating layer 13 is formed by extruding the resin material on the outer periphery of the aggregate 11 in the same manner as a covered electric wire having a stranded wire and a coating layer. For this reason, the space between the outermost wire 12 a and the cylindrical portion 14 of the coating layer 13 can be easily filled with the filling portion 15.

  The 1st and 2nd MCM heat exchangers 10 and 20 and the magnetic heat pump apparatus 1 of this embodiment have the following effects.

  In this embodiment, the assembly 11 in which the plurality of wires 12 are held together can be formed by twisting the plurality of wires 12 together. Thereby, it can suppress that each wire 12 moves with the fluid pressure of a liquid medium, and can suppress the fall of the heat exchange efficiency of the 1st MCM heat exchanger 10. FIG.

  That is, if the position of the wire housed in the MCM heat exchanger is shifted from the position of the permanent magnet, the wire 12 becomes difficult to generate or absorb heat, and the efficiency of heat energy exchange between the wire and the liquid medium is increased. May get worse. On the other hand, the MCM heat exchangers 10 and 20 of the present embodiment can suppress such deterioration of the heat energy exchange efficiency.

  In particular, in the present embodiment, the covering 11 is covered with the aggregate 11 in which the plurality of wires 12 are twisted together, so that the wires 12 located on the outermost periphery are firmly fixed to the filling portion 15 of the covering layer 13. For this reason, since the outer one of the adjacent wires 12 sequentially supports the other inner side, the entire assembly 11 is held by the coating layer 13 as a result. Thereby, it can suppress that the wire 12 moves more than the fluid pressure of a liquid medium, and can further suppress the fall of the heat exchange efficiency of a heat exchanger.

  In the present embodiment, the covering layer 13 includes first and second openings 131 and 132, and the direction from the first opening 131 toward the second opening 132 and the extension of the assembly 11. Since the current direction substantially matches, the increase in pressure loss of the liquid medium flowing down in the MCM heat exchanger 10 is suppressed.

  In the present embodiment, in the first MCM heat exchanger 10, the space between the wire 12 a located on the outermost periphery of the assembly 11 and the cylindrical portion 14 is closed by the filling portion 15 of the coating layer 13. Thereby, a large amount of liquid medium can be passed through the flow path 111 formed between the wires 12, so that the efficiency of heat exchange can be improved.

  Further, in the present embodiment, the plurality of wires 12 are twisted together by concentric twisting, collective twisting, or composite twisting, so that the wires 111 are twisted together while preventing the flow path 111 from being crushed. Can do.

  Moreover, in this embodiment, by satisfy | filling the said (3) Formula and (4) Formula, these wire rods 12 can be twisted together, further preventing that the flow path 111 will be crushed.

  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 is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  The configuration of the magnetic heat pump device described above is an example, and the heat exchanger according to the present invention may be applied to other magnetic heat pump devices of an AMR (Active Magnetic Refrigerataion) system.

  For example, the magnetic heat pump device includes a first MCM heat exchanger, a magnetic field changing unit that applies a magnetic field to the MCM and changes the magnitude of the magnetic field, and a first connected to the MCM heat exchanger via a pipe. And a second external heat exchanger and fluid supply means for supplying fluid from the MCM heat exchanger to the first or second external heat exchanger in conjunction with the operation of the magnetic field changing means.

  Moreover, although the above-mentioned embodiment demonstrated the example which applied the magnetic heat pump apparatus to air conditioners, such as home use or a motor vehicle, it is not specifically limited to this. For example, by selecting an MCM having an appropriate Curie temperature according to the application, the magnetic heat pump device according to the present invention can be applied to an application in a cryogenic temperature region such as a refrigerator or an application in a certain high temperature region. May be.

  In the present embodiment, the aggregate 11 is covered (accommodated) by the coating layer 13, but is not particularly limited thereto, and a container that accommodates the aggregate 11 may be used.

  In the present embodiment, the first and second MCM heat exchangers 10 and 20 have the same configuration, but are not particularly limited thereto, and may have different configurations. . For example, wires having different wire diameters may be used between the first and second MCM heat exchangers 10 and 20. Moreover, the twisting method, twisting direction, or twisting pitch of the plurality of wires may be different from each other.

  In the present embodiment, the MCM heat exchanger is configured by a single assembly. However, the present invention is not particularly limited to this, and a plurality of assemblies are arranged along the extending direction of the MCM heat exchanger. It may be provided and configured. In this case, the plurality of aggregates may have the same configuration or different configurations.

  If the magnetic heat pump device is continuously used, in the MCM heat exchanger, a temperature gradient is generated in which the side connected to the high temperature side pipe becomes high temperature and the side connected to the low temperature side pipe becomes low temperature. For this reason, in the above example, the wire constituting the aggregate located on the high temperature side among the plurality of aggregates arranged in parallel employs a material having a relatively high Curie point (Curie temperature), and on the low temperature side. It is preferable to employ a material having a relatively low Curie point as the wire constituting the aggregate. As described above, the magnetocaloric effect can be applied more efficiently by using the wire made of the material having different Curie points corresponding to the temperature atmosphere in the MCM heat exchanger.

DESCRIPTION OF SYMBOLS 1 ... Magnetic heat pump apparatus 10 ... 1st MCM heat exchanger 11 ... Aggregate 111 ... Flow path 12 ... Wire rod 13 ... Covering layer 131,132 ... 1st and 2nd opening 14 ... cylindrical part 15 ... filling part 16 ... 1st adapter 161 ... 1st connection port 17 ... 2nd adapter 171 ... 2nd connection Port 20 ... Second MCM heat exchanger 21 ... Aggregate 211 ... Flow path 22 ... Wire material 23 ... Coating layer 231,232 ... Third and fourth openings 233 .... Internal space 234 ... Inner peripheral surface 24 ... Cylindrical part 25 ... Filling part 26 ... First adapter 261 ... First connecting port 27 ... Second adapter 271 ... Second connection port 30 ... Piston 35 ... Actuator 40 ... Permanent magnet 50 ..Low temperature side heat exchanger 60 ... High temperature side heat exchanger 70 ... Pump 81-82 ... First and second low temperature side pipes 83-84 ... First and second high temperature side Pipe 90 ... Switching valve 100 ... Resin extrusion coating apparatus 110 ... Extruder 120 ... Cross head 130 ... Molding die 140 ... Nipple 141 ... Insertion hole 150 ... Die 151 ... Insertion hole 152 ... Channel 160 ... Twist device 170 ... Sending bobbin MR: Molten resin

Claims (6)

A heat exchanger used in a magnetic heat pump device,
The heat exchanger is
An assembly formed by twisting a plurality of wires,
An accommodating portion for accommodating the assembly,
The said wire is a heat exchanger comprised from the magnetocaloric effect material which has a magnetocaloric effect. The heat exchanger according to claim 1,
The accommodating portion is
A first opening located at one end;
A second opening located at the other end,
A heat exchanger in which a direction from the first opening toward the second opening substantially coincides with an extending direction of the aggregate. The heat exchanger according to claim 1 or 2,
The accommodating portion is
A cylindrical portion surrounding the periphery of the assembly;
A heat exchanger comprising: a filling portion filled between the wire located on the outermost periphery of the assembly and the cylindrical portion. It is a heat exchanger as described in any one of Claims 1-3,
The heat exchanger in which the plurality of wires are twisted together by concentric twisting, collective twisting, or composite twisting. It is a heat exchanger as described in any one of Claims 1-4,
A heat exchanger that satisfies the following equations (1) and (2).
1.4 × 10 ≦ A ≦ 2.25 × 10 ⁴ (1)
A = P / R (2)
However, in said (2) type | formula, P is the twist pitch which twists these wire rods, R is the wire diameter of the said wire rod. At least one heat exchanger according to any one of claims 1 to 5;
A magnetic field changing means for applying a magnetic field to the magnetocaloric material and changing the magnitude of the magnetic field;
First and second external heat exchangers respectively connected to the heat exchanger via piping;
A fluid supply means for supplying a fluid from the heat exchanger to the first or second external heat exchanger in conjunction with the operation of the magnetic field changing means;

Images