JP2020026926A - Heat exchanger and magnetic heat pump device - Google Patents

Abstract

To provide a heat exchanger which inhibits deformation of a mesh member to inhibit deterioration of heat exchange efficiency.SOLUTION: A heat exchanger 10 includes: multiple mesh members 21; and a case 30 which houses the mesh members 21. Each mesh member 21 is formed by weaving multiple wires 22, 23 formed by magneto-caloric effect material. The wires 22, 23 extend in an X direction and include multiple first wires 22 which extend parallel to each other while spaced part from each other; and multiple second wires 23 which extend in a Y direction and extend parallel to each other while spaced apart from each other. Each first wire 22 passes above N (N is an integer number which is 2 or larger and 5 or smaller) of the second wires 23 and then passes below N of the second wires 23, and the first wire 22 repeats the process.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a heat exchanger used in a magnetic heat pump device utilizing a magnetocaloric effect, and a magnetic heat pump device provided with the heat exchanger.

  As a heat exchanger of a magnetic heat pump device, there is known a heat exchanger in which a plurality of wires made of a magnetocaloric effect material are crossed to form respective grids, and the plurality of grids are stacked and housed in a housing (for example, Patent Document 1).

International Publication No. WO 2016/202663

  By making the shape of the magnetocaloric effect material a lattice shape, it is possible to suppress the pressure loss of the heat transport medium and to improve the heat exchange efficiency of the magnetocaloric effect material.

  However, in the above-mentioned lattice, a first lattice plane composed of a plurality of wires extending in a first longitudinal direction and a plurality of wires extending in a second longitudinal direction are simply referred to as a second lattice plane. It just overlaps. Therefore, in the above heat exchanger, when the heat transport medium is allowed to flow, the wire may be shifted by the pressure of the heat transport medium. As a result, there is a problem that the heat exchange efficiency is reduced due to the deformation of the flow path and the loss of uniformity.

  The problem to be solved by the present invention is to provide a heat exchanger capable of suppressing a decrease in heat exchange efficiency by suppressing deformation of a mesh member, and a magnetic heat pump device including the same. is there.

  [1] A heat exchanger according to the present invention includes a plurality of mesh members, and a case for housing the mesh members. The mesh members include a plurality of linear bodies each formed of a magnetocaloric effect material. A plurality of first linear bodies each extending in a first direction and extending in parallel with each other at intervals, and the first linear bodies are formed by knitting; A plurality of second linear bodies each extending in a second direction intersecting the direction and extending in parallel with each other at an interval, wherein the first linear bodies are N pieces. (N is an integer of 2 or more and an integer of 5 or less.) After passing one side of the second linear body, it passes through the other side of the N second linear bodies. It is a heat exchanger that repeats the process.

  [2] In the above invention, the second linear member passes one side of the N first linear members, and then connects the other side of the N first linear members. The passing may be repeated.

  [3] In the above invention, the first linear body may be such that an intersection position between the first linear body and the second linear body is the position of the second linear body from one or the other side of the second linear body. It may have an inflection point changing to the other side or one side, and the inflection points of the first linear bodies adjacent to each other may be shifted from each other in the first direction.

  [4] In the above invention, the inflection points of the plurality of first linear bodies may be sequentially shifted by one second linear body toward the second direction. Good.

  [5] The magnetic heat pump device according to the present invention includes the heat exchanger, a magnetic field application device that applies a magnetic field to the linear body and changes the magnitude of the magnetic field, and the heat exchanger via a pipe. A first and a second external heat exchanger respectively connected to the first external heat exchanger and the first external heat exchanger from the heat exchanger with a change in the magnitude of the magnetic field applied to the linear body by the magnetic field applying device. A fluid supply device for supplying a fluid to the heat exchanger or the second external heat exchanger.

  According to the present invention, since the mesh member is formed by knitting a plurality of linear bodies each made of a magnetocaloric effect material, the shape of the mesh member can be maintained, and the heat exchange efficiency can be improved. The decrease can be suppressed.

  Further, according to the present invention, after the first linear member passes through one side of N (N is an integer of 2 or more and an integer of 5 or less) second linear members, The linear body is knitted so as to repeat passing on the other side of the second linear body of the book. This makes it possible to knit a linear body made of a brittle magnetocaloric effect material with a relatively small curvature, so that it is possible to suppress an increase in the mesh and an increase in the thickness of the mesh member, and to reduce the filling rate of the magnetocaloric effect material. It can also be improved.

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 where a magnet is at a first position. FIG. 2 is a diagram illustrating an overall configuration of the magnetic heat pump device according to the embodiment of the present invention, and is a diagram illustrating a state where a magnet is at a second position. FIG. 3 is an exploded perspective view showing the configuration of the MCM heat exchanger in the embodiment of the present invention. FIG. 4 is a cross-sectional view of the MCM heat exchanger according to the embodiment of the present invention, and is a cross-sectional view of the MCM heat exchanger cut along a longitudinal direction. FIG. 5 is a cross-sectional view of the MCM heat exchanger taken along the line VV in FIG. FIG. 6 is an enlarged plan view of a VI portion in FIG. FIG. 7 is a cross-sectional view of the mesh member taken along line VII-VII in FIG. FIG. 8 is a cross-sectional view of the mesh member taken along line VIII-VIII in FIG. FIG. 9 is an enlarged plan view showing a first modification of the mesh member according to the embodiment of the present invention. FIG. 10 is an enlarged plan view showing a second modification of the mesh member 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 views showing the overall configuration of a magnetic heat pump device according to the present embodiment, FIGS. 3 to 5 are views showing an MCM heat exchanger according to the present embodiment, and FIGS. 6 to 8 are mesh members according to the present embodiment. FIG.

  The magnetic heat pump device 1 according to the present embodiment is a heat pump device using a magnetocaloric effect. As shown in FIGS. 1 and 2, the magnetic heat pump device 1 includes an MCM heat exchanger 10, a magnetic field application device 40, a high-temperature heat exchanger 51, a low-temperature heat exchanger 52, and a pump device 60. , And pipes 91 to 94.

  The MCM heat exchanger 10 in the present embodiment corresponds to an example of the heat exchanger in the present invention, the magnetic field applying device 40 in the present embodiment corresponds to an example of the magnetic field applying device in the present invention, and the high temperature side heat in the present embodiment. The heat exchanger 51 and the low-temperature side heat exchanger 52 correspond to an example of the external heat exchanger in the present invention, the pump device 60 in the present embodiment corresponds to an example of the fluid supply device in the present invention, and the magnetic heat pump in the present embodiment The device 1 corresponds to an example of a magnetic heat pump device according to the present invention.

  As shown in FIGS. 3 to 5, the MCM heat exchanger 10 includes a laminate 20 and a cylindrical case (container) 30 in which the laminate 20 is stored. The laminated body 20 is configured by laminating a plurality of mesh members 21 as shown in FIGS. As shown in FIGS. 5 and 6, the mesh member 21 is a mesh member formed by weaving using wires 22 and 23.

  The mesh member 21 in the present embodiment corresponds to an example of the mesh member in the present invention, the case 30 in the present embodiment corresponds to an example of the case in the present invention, and the wires 22 and 23 in the present embodiment correspond to the wires in the present invention. This corresponds to an example of a shape.

  The wires 22 and 23 are made of a magnetocaloric effect material (MCM) having a magnetocaloric effect. When a magnetic field is applied to the wires 22 and 23 composed of the MCM, the magnetic entropy is reduced by aligning the electron spins, and the wires 22 and 23 generate heat and increase in temperature. On the other hand, when the magnetic field is removed from the wires 22 and 23, the electron spins become disordered, the magnetic entropy increases, and the wires 22 and 23 absorb heat and lower in temperature.

  The MCM constituting the wires 22 and 23 is not particularly limited as long as it is a magnetic material. For example, the MCM has a Curie point (Curie temperature) in a normal temperature range of about 10 ° C. to 30 ° C. and has a high magnetocaloric effect in a normal temperature range. It is preferable that the magnetic material exhibit the following. Specific examples of such an MCM include, for example, gadolinium (Gd), a gadolinium alloy, a lanthanum-iron-silicon (La-Fe-Si) -based compound, and the like.

  Although the wires 22 and 23 in the present embodiment are wires having a circular cross-sectional shape, the wires 22 and 23 may have a cross-sectional shape other than a circle. The wire diameter of the wires 22 and 23 is not particularly limited, but is preferably, for example, 0.01 to 1 mm.

  In addition, you may use the bundled wire comprised by bundling several wires mutually instead of the wires 22 and 23 as a linear body. In this case, the “bundled wire” corresponds to an example of the linear body in the present invention. Alternatively, instead of the first and second wires 22 and 23, a stranded wire formed by twisting a plurality of wires together may be used as the linear body. In this case, the “stranded wire” corresponds to an example of the linear body in the present invention.

In the mesh member 21, as shown in FIG. 6, a plurality of first wires 22 linearly extending along the X direction are arranged substantially parallel to each other at a _first pitch P1. ing. On the other hand, the second wire 23 the plurality extending in a straight line along the Y direction, and mutually substantially arranged in parallel to the first pitch P ₁ of the same second pitch P ₂ (P ₁ = P ₂ ). That is, the shape of each mesh 24 defined by the plurality of wires 22 and 23 is a square. The “pitch” in the present embodiment refers to the shortest distance between centers of mutually adjacent wires.

  The shape of the mesh 24 of the mesh member 21 is not particularly limited to the above-described square. Although not particularly shown, for example, the shape of the mesh 24 of the mesh member 21 may be a rectangle, a rhombus, or a parallelogram.

  As shown in FIGS. 6 to 8, the mesh member 21 is formed by knitting a first wire 22 as a weft and a second wire 23 as a warp. Thereby, it is possible to prevent the wires 22 and 23 from being deformed by the pressure of the heat transport medium CL, and to maintain the shape of the mesh member 21. In the present embodiment, the mesh member 21 is woven with a so-called twill weave.

  Specifically, as shown in FIG. 7, the first wire 22 passes above the two second wires 23 while extending along the X-axis direction, and passes through the first inflection point. 221, passing under the two second wires 23, and passing through the next first inflection point 221, passing above the two second wires 23. Repeat. Thus, the first wire 22 made of a brittle magnetocaloric effect material can be knitted with a relatively small curvature, and the expansion of the mesh 24 and the increase in the thickness of the mesh member 21 can be suppressed. Note that the first inflection point 221 is defined as a point at which the intersection of the first wire 22 and the second wire 23 is from the upper side or the lower side of the second wire 23 to the lower side of the second wire 23 or This is the part that changes to the upper side.

  The number of the second wires 23 intersecting with the first wires 22 between the first inflection points 221 is not particularly limited as long as the number of the second wires 23 is five or less. If the number of intersections of the second wire 23 with the first wire 22 is more than 5, it becomes difficult to maintain the shape of the mesh member 21 with respect to the pressure of the heat transport medium CL.

  Similarly, as shown in FIG. 8, the second wire 23 also passes under the two first wires 22 while extending along the Y direction, and passes through the second inflection point 231. Passing through the upper side of the two first wires 22, passing through the next second inflection point 231, and passing below the two first wires 22. I have. Thereby, the second wire 23 made of a brittle magnetocaloric effect material can be knitted with a relatively small curvature, and the expansion of the mesh 24 and the increase in the thickness of the mesh member 21 can be suppressed. The second inflection point 231 is defined as a point at which the intersection of the second wire 23 and the first wire 22 is from the upper side or the lower side of the first wire 22 to the lower side of the first wire 22 or This is the part that changes to the upper side.

  The number of the first wires 22 that intersect with the second wires 23 between the second inflection points 231 is not particularly limited as long as the number is five or less. If the number of intersections of the first wire 22 with the second wire 23 is more than 5, it becomes difficult to maintain the shape of the mesh member 21 with respect to the pressure of the heat transport medium CL.

  In the present embodiment, as shown in FIG. 6, the first inflection points 221 of the first wires 22 adjacent to each other are shifted from each other in the X direction. Similarly, the second inflection points 231 of the second wires 23 adjacent to each other are also shifted from each other in the Y direction. Thereby, the deformation of the mesh member 21 can be further suppressed.

  Further, in the present embodiment, the plurality of first inflection points 221 are sequentially shifted by one second wire rod 23 in the Y direction. Similarly, the plurality of second inflection points 231 are sequentially shifted by one first wire rod 22 in the X direction. In the present embodiment, by adopting such a twill weave as the weave structure of the mesh member 21, the interval between the first inflection points 221 in the first wire rod 22 can be made uniform, and the second The distance between the second inflection points 231 of the wire 23 can also be made uniform. Therefore, the strength can be made uniform over the entire area of the mesh member 21.

  The method of knitting the mesh member 21 is not particularly limited to the above. FIG. 9 is an enlarged plan view illustrating a first modified example of the mesh member according to the present embodiment, and FIG. 10 is an enlarged plan view illustrating a second modified example of the mesh member according to the present embodiment.

  For example, as shown in FIG. 9, the plurality of first inflection points 221 may be shifted at random in the Y direction. Similarly, the plurality of second inflection points 231 may be shifted at random in the X direction.

  Alternatively, as shown in FIG. 10, the plurality of first inflection points 221 may include adjacent first inflection points 221 without being shifted from each other in the X direction. Similarly, a plurality of second inflection points 231 may include adjacent second inflection points 231 without shifting in the Y direction.

  Returning to FIGS. 3 to 5, the case 30 includes a housing portion 31 and a lid portion 32, and has a cylindrical shape having a rectangular cross section. The case 30 has a first opening 301 at one end and a second opening 302 at the other end. Note that the shape of the case 30 is not particularly limited to the above as long as it is a cylindrical shape.

  The housing portion 31 includes a bottom portion 311 that forms a bottom plate of the case 30 and a pair of side portions 312 and 313 that form side walls on both sides of the case 30. An opening 314 is formed between the upper ends of the pair of side portions 312 and 313. As a result, the accommodation portion 31 has a U-shape in a cross section along a direction substantially orthogonal to the axial direction thereof. It has a substantially U-shaped cross section.

  The lid 32 is a rectangular plate-shaped member. The lid 32 is fixed to upper ends of the pair of side parts 312 and 313. The case 30 is formed by closing the opening 314 of the housing 31 with the lid 32.

  The laminated body 20 is formed so that the laminating direction of the mesh member 21 (the Z direction in the drawing) and the axial direction of the case 30 (the direction from the first opening 131 to the second opening 132) substantially match. It is housed in the case 30. By the mesh 24 of the mutually laminated mesh members 21, a flow path through which the heat transport medium CL described later flows is formed in the laminate 20.

  As shown in FIGS. 3 and 4, first and second terminal members (connection members) 33 and 34 are attached to both ends of the case 30. The first terminal member 33 includes a connection port 331 and a connection port 332 that is larger than the connection port 331. As the first terminal member 33, for example, a heat-shrinkable tube, a resin molded product, a metal processed product, or the like can be used.

  One end of the case 30 is inserted into the connection port 332 of the first terminal member 33, and the first terminal member 33 is fixed to the end of the case 30. A first pipe 91 is connected to a connection port 331 of the first terminal member 33. As shown in FIGS. 1 and 2, the MCM heat exchanger 10 is connected to the first pipe 91. Through the high-temperature side heat exchanger 51.

  The second terminal member 34 has the same configuration as the first terminal member 33 described above. The other end of the case 30 is inserted into the connection port 342 of the second terminal member 34, and the second terminal member 34 is fixed to the end of the case 30. A second pipe 92 is connected to the connection port 341 of the second terminal member 34. As shown in FIGS. 1 and 2, the MCM heat exchanger 10 is connected to the second pipe 92. Through the low-temperature side heat exchanger 52.

  As shown in FIGS. 1 and 2, the magnetic field application device 40 includes a pair of permanent magnets 41, a support member 42 that supports the permanent magnets 41, an actuator 43 that moves the permanent magnets 41 via the support members 42, It has. The permanent magnets 41 are separated from each other and face each other. As a specific example of the actuator 43, for example, an air cylinder or the like can be illustrated.

  These permanent magnets 41 are separated from the MCM heat exchanger 10 by the actuator 43 (without sandwiching the MCM heat exchanger 10), and the “first position” (the state shown in FIG. 1) and the MCM heat exchanger 10 It is possible to reciprocate between a sandwiched “second position” (a state shown in FIG. 2). When the permanent magnet 41 moves to the “first position”, the laminate 20 of the MCM heat exchanger 10 is demagnetized, and the laminate 20 absorbs heat. On the other hand, when the permanent magnet 41 moves to the “second position”, the laminate 20 of the MCM heat exchanger 10 is excited, and the laminate 20 generates heat.

  The magnetic field applying device 40 may be configured by an electromagnet having a coil. In this case, the actuator can be omitted. When an electromagnet having a coil is used, the magnitude of the magnetic field applied to the laminate 20 may be changed instead of applying / removing the magnetic field to / from the laminate 20.

  The other end of the first pipe 91 is connected to the first port 511 of the high-temperature side heat exchanger 51, and the high-temperature side heat exchanger 51 communicates with the MCM heat exchanger through the first pipe 91. It communicates with the vessel 10. On the other hand, one end of a third pipe 93 is connected to the second port 512 of the high-temperature side heat exchanger 51, and the other end of the third pipe 93 is connected to one of the reciprocating ports of the pump device 60. It is connected to a pump 71.

  The other end of the second pipe 92 is connected to the first port 521 of the low-temperature side heat exchanger 52, and the low-temperature side heat exchanger 52 communicates with the MCM heat exchanger through the second pipe 92. It communicates with the vessel 10. On the other hand, one end of a fourth pipe 94 is connected to the second port 522 of the low-temperature side heat exchanger 52, and the other end of the fourth pipe 94 is connected to the other end of the pump device 60. It is connected to a pump 72.

  For example, when the air conditioner using the magnetic heat pump device 1 according to the present embodiment functions as cooling, the room is cooled by performing heat exchange between the low-temperature side heat exchanger 52 and room air, The heat is exchanged between the high-temperature side heat exchanger 51 and the outdoor to radiate heat to the outdoor.

  On the other hand, when the air conditioner functions as heating, the room is warmed by performing heat exchange between the high-temperature side heat exchanger 51 and indoor air, and the low-temperature side heat exchanger 52 is By exchanging heat with the air, heat is absorbed from outside.

  The heat transport liquid CL is pumped by the pump device 60 in the piping system including the heat exchangers 10, 51, 52 and the piping 91 to 94 described above. Specific examples of the heat transport liquid CL include, for example, liquids such as water, antifreeze, ethanol solutions, and mixtures thereof. The heat transport liquid CL in the present embodiment corresponds to an example of the fluid in the present invention.

  As shown in FIGS. 1 and 2, the pump device 60 of the present embodiment includes a pair of reciprocating pumps 71 and 72 and an actuator 80 for driving the reciprocating pumps 71 and 72. One reciprocating pump 71 pumps the heat transport liquid CL from the MCM heat exchanger 10 toward the low-temperature side heat exchanger 52, while the other reciprocating pump 72 transmits the heat-transfer liquid CL from the MCM heat exchanger 10 to the high-temperature side heat exchange. The heat transport liquid CL is pumped toward the vessel 51.

  One reciprocating pump 71 includes a cylindrical cylinder 711 and a plunger 712 that can reciprocate in the cylinder 711. The third pipe 93 is connected to a connection port 711a of the cylinder 711. ing. That is, the reciprocating pump 71 is connected to the MCM heat exchanger 10 via the third pipe 93, the high-temperature side heat exchanger 51, and the first pipe 91, and is connected via the third pipe 93. To the MCM heat exchanger 10.

  The other reciprocating pump 72 also includes a cylindrical cylinder 721 and a plunger 722 that can reciprocate in the cylinder 721, and the fourth pipe 94 is connected to a connection port 721a of the cylinder 721. ing. That is, the reciprocating pump 72 is connected to the MCM heat exchanger 10 via the fourth pipe 94, the low-temperature side heat exchanger 52, and the second pipe 92, and is connected via the fourth pipe 94. To the MCM heat exchanger 10.

  As shown in FIGS. 1 and 2, the reciprocating pumps 71 and 72 are connected by connecting members 81 at the rear ends of the plungers 712 and 722, and the two plungers 712 and 722 face in opposite directions. I have. The connecting member 81 is connected to the actuator 80, and the two plungers 712 and 722 can reciprocate by one actuator 80. As a specific example of the actuator 80, for example, an air cylinder or the like can be exemplified.

  The operation of the actuator 80 of the pump device 60 is synchronized with the operation of the actuator 43 of the magnetic field applying device 40 described above under the control of a control device (not shown). Specifically, at the “first position” shown in FIG. 1, the plunger 712 of one reciprocating pump 71 moves forward and the plunger 722 of the other reciprocating pump 72 moves backward at the “first position” shown in FIG. On the other hand, at the “second position” shown in FIG. 2, the plunger 712 of one reciprocating pump 71 retreats, and the plunger 722 of the other reciprocating pump 72 advances.

  Next, the operation of the magnetic heat pump device 1 according to the present embodiment will be described with reference to FIGS.

  First, the actuator 43 of the magnetic field applying device 40 is driven to move the pair of magnets 41 to the “first position”. Thereby, the laminated body 20 in the MCM heat exchanger 10 is demagnetized, and the temperature of the laminated body 20 decreases.

  At the same time, the actuator 80 of the pump device 60 is driven to advance the plunger 712 of the one reciprocating pump 71 in the cylinder 711 and to retract the plunger 722 of the other reciprocating pump 72 in the cylinder 721. As a result, the heat transport liquid CL moves from the high-temperature side heat exchanger 51 toward the low-temperature side heat exchanger 52, and the heat transport liquid CL has a lower temperature when passing through the MCM heat exchanger 10. Cooled by body 20.

  Next, as shown in FIG. 2, the pair of magnets 41 and 42 are moved to the “second position” by the actuator 45 of the magnetic field applying device 40. Thereby, the laminate 20 in the MCM heat exchanger 10 is excited, and the temperature of the laminate 20 increases.

  At the same time, the plunger 712 of one reciprocating pump 71 is retracted in the cylinder 711 and the plunger 722 of the other reciprocating pump 72 is advanced in the cylinder 721 by the actuator 80 of the pump device 40. As a result, the heat transport liquid CL moves from the low-temperature side heat exchanger 52 toward the high-temperature side heat exchanger 51, and the heat transport liquid CL, when passing through the MCM heat exchanger 10, has an increased temperature. Heated by body 20.

  Then, the reciprocating movement between the “first position” and the “second position” of the magnet 41 and the plungers 712 and 722 described above is repeated to apply / remove a magnetic field to the MCM 11 in the MCM heat exchanger 10. Is repeated, the heating of the high-temperature side heat exchanger 51 and the cooling of the low-temperature side heat exchanger 52 are continued.

  As described above, in the present embodiment, since the mesh member 21 is formed by knitting the plurality of wires 22 and 23 each formed of a magnetocaloric effect material, the shape of the mesh member 21 is maintained. And a decrease in heat exchange efficiency can be suppressed.

  Further, a magnetocaloric effect material usually formed of a rare earth element or a ceramic material is brittle, and strong knitting cannot be applied when a wire made of the magnetocaloric effect material is knitted in a mesh shape. For this reason, the wire must be knitted with a large curvature, and the mesh of the mesh member may be enlarged or the thickness of the mesh member may be increased.

  On the other hand, in the present embodiment, the first (second) wire rod 22 (23) has N (N is an integer of 2 or more and an integer of 5 or less) second (first) wire rod 22 (23). The wires 22, 23 are knitted so as to repeat passing under the N second (first) wires 23 (22) after passing over the top of the wires 23 (22). Accordingly, the wires 22 and 23 made of the brittle magnetocaloric effect material can be knitted with a small curvature, so that the mesh and the thickness of the mesh member 21 can be suppressed from increasing, and the magnetocaloric effect material in the case 30 can be suppressed. Can be improved.

  In general, when the direction of the applied magnetic field is parallel to the longitudinal direction of the magnetocaloric effect material, the influence of the demagnetizing field is reduced, whereas the direction of the applied magnetic field is orthogonal to the magnetocaloric effect material. The influence of the demagnetizing field increases. Therefore, the demagnetizing field can be reduced by making the extending direction of the wire constituting the mesh member coincide with the direction in which the magnetic field is applied. However, in the case of a plain-woven mesh member in which a warp and a weft alternately intersect one by one, individual wires are finely meandered in the cross section of the mesh member due to weaving, so that the demagnetizing field cannot be sufficiently reduced. There is.

  On the other hand, in the present embodiment, by knitting the wires 22 and 23 in the above-described manner, the meandering period of each of the wires 22 and 23 can be widened, so that the demagnetizing field can be reduced. .

  The embodiments described above are described for facilitating the understanding of the present invention, and are 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.

  For example, the configuration of the magnetic heat pump device described above is an example, and the above-described MCM heat exchanger 10 may be applied to an AMR (Active Magnetic Refrigerataion) type magnetic heat pump device having another configuration.

  Further, in the above-described embodiment, an example in which the magnetic heat pump device is applied to an air conditioner for home use or an automobile has been described, but the present invention is not particularly 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 is applied to an application in an extremely low temperature range such as a refrigerator or an application in a somewhat high temperature range. May be.

DESCRIPTION OF SYMBOLS 1 ... Magnetic heat pump apparatus 10 ... MCM heat exchanger 20 ... Laminated body 21 ... Mesh member 22 ... 1st wire
221: first inflection point 23: second wire rod
231: second inflection point 24: mesh 30 ... case 301, 302 ... opening 31 ... accommodation part 311 ... bottom part 312, 313 ... side part 314 ... opening 32 ... lid part 33, 34 ... terminal member 331, 341 ... connection Ports 332, 342 Connection port 40 Magnetic field applying device 41 Magnet 42 Supporting member 43 Actuator 51 High-temperature side heat exchanger 511, 512 Port 52 Low-temperature side heat exchanger 521, 522 Port 60 Pumping device 71, 72 Reciprocating pump 711, 721 Cylinder 711a, 721a Connection port 712, 722 Plunger 80 Actuator 81 Connection member 82 Support member 91-94 First to fourth pipe CL Heat transfer liquid

Claims (5)

A plurality of mesh members,
And a case for accommodating the mesh member,
The mesh member is formed by knitting a plurality of linear bodies each formed of a magnetocaloric effect material,
The linear body,
A plurality of first linear bodies each extending in the first direction and extending in parallel with each other at intervals;
A plurality of second linear bodies each extending in a second direction intersecting the first direction and extending in parallel with each other at intervals.
After passing through one side of the N second linear bodies (N is an integer of 2 or more and an integer of 5 or less), the first linear bodies are N in number of the first linear bodies. A heat exchanger that repeats passing through the other side of the linear body of 2. The heat exchanger according to claim 1, wherein
The second linear body repeats heat passing one side of the N first linear bodies and then passing the other side of the N first linear bodies. vessel. The heat exchanger according to claim 1 or 2,
In the first linear body, an intersecting position with the second linear body is changed from one or the other side of the second linear body to the other or one side of the second linear body. Has inflection points,
The heat exchanger, wherein the inflection points of the first linear bodies adjacent to each other are shifted from each other in the first direction. The heat exchanger according to claim 3, wherein
The heat exchanger in which the inflection points of the plurality of first linear bodies are sequentially shifted by one second linear body toward the second direction. A heat exchanger according to any one of claims 1 to 4,
A magnetic field applying device that applies a magnetic field to the linear body and changes the magnitude of the magnetic field,
First and second external heat exchangers respectively connected to the heat exchanger via piping,
Fluid is supplied from the heat exchanger to the first external heat exchanger or the second external heat exchanger with a change in the magnitude of the magnetic field applied to the linear body by the magnetic field applying device. A magnetic heat pump device comprising: a fluid supply device.

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