JP2018132204A - Heat exchanger and magnetic heat pump device - Google Patents

Abstract

Provided is a heat exchanger capable of suppressing deformation and breakage of a linear body due to fluid pressure and suppressing the influence of a demagnetizing field even if the linear body made of a magnetocaloric effect material is thinned. To do. An MCM heat exchanger (10) includes a plurality of mesh members (12) stacked on each other, and a container (13) for housing the mesh members (12), each mesh member (12) having a plurality of wire rods. The plurality of wire rods include a plurality of first wire rods 121 extending along the Z-axis direction and a plurality of second wire rods 122 extending along the X-axis direction. The first and second wire rods 121 and 122 are made of a magnetocaloric effect material having a magnetocaloric effect, and the second pitch P2 of the second wire rods adjacent to each other is equal to that of the first wire rods 121 adjacent to each other. It is relatively wide with respect to the first pitch P1. [Selection] Figure 6

Description

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

  A magnetic refrigeration apparatus is known that suppresses a demagnetizing field by accommodating the magnetic working material in a duct so that the longitudinal direction of the rod-shaped magnetic working material matches the direction of the magnetic field (see, for example, Patent Document 1). .

JP 2013-257104 A

  From the viewpoint of improving heat exchange efficiency, it is preferable to increase the contact area between the magnetic working material and the heat exchange medium by thinning the rod-shaped magnetic working material. However, in the above magnetic refrigeration apparatus, each magnetic working material is supported by the duct only at both ends thereof, and is provided so as to be separated from each other. There is a problem that the material may be deformed or broken.

  The problem to be solved by the present invention is that even if the linear body made of a magnetocaloric effect material is thinned, the deformation and breakage of the linear body due to the pressure of the fluid are suppressed and the influence of the demagnetizing field is suppressed. The object is to provide a possible heat exchanger and a magnetic heat pump device equipped with the heat exchanger.

  [1] A heat exchanger according to the present invention includes a plurality of mesh members stacked on each other, and a container that accommodates the plurality of mesh members, each mesh member having a plurality of linear shapes. A plurality of linear bodies extending along a first direction and a second direction intersecting the first direction. A plurality of second linear bodies extending, wherein the first and second linear bodies are made of a magnetocaloric effect material having a magnetocaloric effect and are adjacent to each other. The pitch of the linear bodies is a heat exchanger that is relatively wide with respect to the pitch of the first linear bodies adjacent to each other.

  [2] In the above invention, the first direction is substantially parallel to the direction of the magnetic field applied to the linear body, and the container has a first opening located at one end; A second opening located at the other end, and the direction from the first opening toward the second opening is substantially parallel to the stacking direction of the mesh members. Also good.

  [3] In the above invention, the number of the first linear bodies included in each mesh member may be relatively greater than the number of the second linear bodies included in each mesh member. Good.

  [4] In the above invention, the second linear body may have a cross-sectional shape whose length along the first direction is relatively large with respect to the length along the stacking direction. .

  [5] In the above invention, the plurality of mesh members may be partially joined to each other, or may not be joined to each other.

  [6] A magnetic heat pump device according to the present invention includes the at least one heat exchanger, and a magnetic field changing unit that applies a magnetic field to the linear body and changes the magnitude of the magnetic field, The changing means is a magnetic heat pump device provided such that the direction in which the magnetic field is applied is substantially orthogonal to the stacking direction of the plurality of mesh members.

  [7] In the above invention, the magnetic heat pump device is applied to the mesh member by first and second external heat exchangers respectively connected to the heat exchanger via piping and the magnetic change means. A fluid supply means for supplying fluid from the heat exchanger to the first external heat exchanger or the second external heat exchanger according to a change in the magnitude of the magnetic field.

  According to the present invention, mesh members are formed by weaving a plurality of linear bodies made of a magnetocaloric material, the plurality of mesh members are stacked on each other, and the stack is accommodated in a container. For this reason, even if a linear body is made thin, it becomes possible to suppress a deformation | transformation and a fracture | rupture of a linear body by the pressure of a fluid.

  In addition, according to the present invention, the pitch of the second linear bodies adjacent to each other is relatively wider than the pitch of the first linear bodies adjacent to each other. Can be suppressed.

FIG. 1 is a diagram showing an overall configuration of a magnetic heat pump device according to an embodiment of the present invention, and shows a state where 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 in the embodiment of the present invention. FIG. 4 is a cross-sectional view of the MCM heat exchanger in the embodiment of the present invention, and is a cross-sectional view of the MCM heat exchanger cut along the longitudinal direction. FIG. 5 is a cross-sectional view taken along line VV in FIG. FIG. 6 is a diagram showing a mesh of mesh members in the embodiment of the present invention, and is an enlarged view of a VI part in FIG. 5. 7A is a cross-sectional view of the second wire rod of the mesh member shown in FIG. 6, is a cross-sectional view taken along line VIIA-VIIA of FIG. 7, and FIG. 7B is a cross-sectional view of the mesh member. It is sectional drawing which shows the modification of 2 wires. FIG. 8 is a view showing a joint portion of the mesh member in the embodiment of the present invention, and is an enlarged view of a portion VIII in FIG.

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

  1 and 2 are diagrams showing the overall configuration of the magnetic heat pump device in the present embodiment, FIGS. 3 to 5 are diagrams showing an MCM heat exchanger in the present embodiment, and FIG. 6 is a mesh member mesh in the present embodiment. FIG. 7A is a cross-sectional view of the second wire rod of the mesh member shown in FIG. 6, FIG. 7B is a cross-sectional view showing a modification of the second wire rod of the mesh member, and FIG. It is a figure which shows the junction part of the mesh member in a form.

  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 first and second MCM heat exchangers 10 and 20 in the present embodiment correspond to an example of a heat exchanger in the present invention, and the piston 30 and the permanent magnet 40 in the present embodiment serve as an example of a magnetic changing unit in the present invention. The low temperature side heat exchanger 50 and the high temperature side heat exchanger 60 correspond to an example of the first and second external heat exchangers in the present invention, and the pipes 81 to 84 in the present embodiment are the pipes in the present invention. It corresponds to an example, and the pump 70 and the switching valve 90 in the present embodiment correspond to an example of the fluid supply means in the present invention.

  As shown in FIGS. 3 to 5, the first MCM heat exchanger 10 includes a laminated body 11 formed by laminating a plurality of mesh members 12 and a cylindrical shape in which the laminated body 11 is accommodated. A container (case) 13 and terminal members 16 and 17 connected to both ends of the container 13 are provided. The mesh member 12 in the present embodiment corresponds to an example of the mesh member in the present invention, and the container 13 in the present embodiment corresponds to an example of the container in the present invention.

  Since the first MCM heat exchanger 10 and the second MCM heat exchanger 20 have the same structure, only the configuration of the first MCM heat exchanger 10 will be described below. A description of the configuration of the MCM heat exchanger 20 is omitted.

  As shown in FIGS. 5 and 6, each mesh member 12 is a mesh-like member configured by weaving a plurality of wire rods 121 and 122. The 1st and 2nd wire 121,122 in this embodiment is equivalent to an example of the linear body in this invention.

  The 1st and 2nd wire 121,122 which comprises this mesh member 12 is comprised from the magnetocaloric effect material (MCM: Magneticocaloric Effect Material) which has a magnetocaloric effect. When a magnetic field is applied to the wires 121 and 122 composed of the MCM, the magnetic spins are reduced by aligning the electron spins, the wires 121 and 122 generate heat, and the temperature rises. On the other hand, when the magnetic field is removed from the wires 121 and 122, the electron spin becomes messy and the magnetic entropy increases, and the wires 121 and 122 absorb heat and the temperature decreases.

  The MCM constituting the wires 121 and 122 is not particularly limited as long as it is a magnetic material. For example, the MCM has a Curie temperature (Curie point) in a room temperature range of about 10 ° C. to 30 ° C. It is preferable that it is a magnetic body which exhibits. Specific examples of such MCMs include gadolinium (Gd), gadolinium alloys, lanthanum-iron-silicon (La-Fe-Si) compounds, and the like.

  As shown in FIG. 7A, the wire rods 121 and 122 in the present embodiment are wire rods having a circular cross-sectional shape, but the wire rods 121 and 122 may have a cross-sectional shape other than a circle. Although it does not specifically limit as a wire diameter of the wire 121,122, For example, it is preferable that it is 0.01-1 mm.

  Note that as the plurality of first wire rods 121 constituting the mesh member 12, wire rods having substantially the same diameter may be used, or wires having mutually different diameters may be used. Similarly, as the plurality of second wires 122 constituting the mesh member 12, wires having substantially the same diameter may be used, or wires having different diameters may be used.

  Further, as the first and second wire rods 121 and 122 constituting the mesh member 12, wire rods having substantially the same diameter may be used, or wire rods having mutually different diameters may be used. Alternatively, as the first and second wires 121 and 122 constituting the mesh member 12, wires having substantially the same cross-sectional shape may be used, or wires having mutually different cross-sectional shapes may be used. .

For example, while the cross-sectional shape of the first wire 121 is circular (see FIG. 7A), the cross-sectional shape of the second wire 122 ′ is a flat shape as shown in FIG. 7B. Good. Specifically, as shown in FIG. 7B, the second wire 122 ′ has a relative width w ₁ along the Z-axis direction with respect to a height h ₁ along the Y-axis direction. It may have an elliptical cross-sectional shape that is larger (w ₁ > h ₁ ).

  Further, as the first and second linear bodies constituting the mesh member 12, instead of the first and second wire rods 121 and 122, a bundle wire formed by bundling a plurality of wire rods with each other is used. Also good. In this case, the bundled wire corresponds to an example of the first and second linear bodies in the present invention.

  Alternatively, as the first and second linear bodies constituting the mesh member 12, instead of the first and second wire rods 121 and 122, stranded wires configured by mutually twisting a plurality of wire rods are used. May be. In this case, the stranded wire corresponds to an example of the first and second linear bodies in the present invention.

  Although it does not specifically limit as how to twist a wire, For example, a collective twist, a concentric twist, a composite twist etc. can be illustrated. Aggregate twisting is a twisting method in which a plurality of wires are gathered together and twisted in the same direction around the axis of the aggregate. Concentric twisting is a twisting method in which concentric circles are twisted around a plurality of wires around the core wire. The composite twist is a twisting method in which a child twisted wire obtained by twisting a plurality of wires into a concentric twist or a collective twist is further twisted into a concentric twist or a collective twist.

  As shown in FIGS. 5 and 6, the plurality of first wire rods 121 extend linearly along the Z-axis direction and are arranged substantially parallel to each other. The plurality of second wire rods 122 extend linearly along the X-axis direction and are arranged substantially parallel to each other. That is, in the present embodiment, the plurality of first wire rods 121 and the plurality of second wire rods 122 are substantially orthogonal to each other. The Z-axis direction in the present embodiment corresponds to an example of the first direction in the present invention, and the X-axis direction in the present embodiment corresponds to an example of the second direction in the present invention. The extending direction of the first wire 121 is the Z-axis direction (that is, the direction substantially parallel to the magnetic field application direction by the permanent magnet 40), and the extending direction of the second wire 122 is As long as it intersects the Z-axis direction, the extending direction of the second wire 122 is not particularly limited to the X-axis direction.

The first wire 121 adjacent to each other in a plurality of first wire 121 is disposed substantially equidistant from one another at a first pitch P _1. On the other hand, a second wire 122 of a plurality of mutually adjacent in the plurality of second wire 122 is disposed substantially equidistant from one another at a second pitch P _2. In the present embodiment, the second pitch P ₂ is relatively wider than the _first pitch P ₁ (P ₂ > P ₁ ). As a result, the shape of each mesh 123 defined by the plurality of first wires 121 and the plurality of second wires 122 is a rectangle. In the present embodiment, as shown in FIG. 5, in each mesh member 12, the number N _{1 of} the first wires 121 is relatively larger than the number N _{2 of} the second wires 122. (N ₁ > N ₂ ). The “pitch” in the present embodiment means the shortest distance between the centers of the adjacent wires.

  As shown in FIGS. 3 and 4, the laminate 11 is configured by stacking a plurality of mesh members 12 described above. At this time, the mesh members 12 are laminated so that the meshes 123 of the mesh members 12 adjacent to each other overlap each other in the lamination direction (Y-axis direction in the drawing). For this reason, the flow path 124 (refer FIG. 4 and FIG. 7) through which a liquid refrigerant (after-mentioned) distribute | circulates is formed by the connection of the mesh | network 123 of the several mesh member 12 which comprises the laminated body 11. FIG. In FIG. 4, in order to facilitate understanding of the flow path 124, the number of the linear bodies constituting the mesh member 12 is reduced and the interval between the linear bodies is increased as compared with other drawings. Show.

  In this embodiment, as shown in FIG. 8, the mesh members 12 that are laminated to each other are fixed by bonding ends thereof with an adhesive 125, and a plurality of meshes that constitute the laminate 11. The member 12 is integrated. The adhesive 125 is provided over the entire circumference of the mesh member 12. Thus, the rigidity of the mesh member 12 can be further enhanced by integrating the plurality of mesh members 12. In addition, it is not necessary to join the mesh members 12 stacked on each other. In this case, the individual mesh members 12 are easily exchanged.

  As shown in FIGS. 3 to 5, the container 13 that accommodates the stacked body 11 includes an accommodating portion 14 and a lid portion 15, and has a cylindrical shape with a rectangular cross section. The container 13 has a first opening 131 at one end thereof and a second opening 132 at the other end thereof. The shape of the container 13 is not particularly limited as long as it is a cylindrical shape.

  The first opening 131 of the container 13 in the present embodiment corresponds to an example of the first opening of the container in the present invention, and the second opening 132 of the container 13 in the present embodiment is the second opening of the container in the present invention. It corresponds to an example.

  The accommodating portion 14 includes a bottom portion 141 constituting a bottom plate of the container 13 and a pair of side portions 142 and 143 constituting side walls on both sides of the container 13. An opening 144 is formed between the upper ends of the pair of side portions 142 and 143, and as a result, the accommodating portion 14 is U-shaped in a cross section along a direction substantially perpendicular to the axial direction ( It has a substantially U-shaped cross-sectional shape.

  The lid 15 is a rectangular plate member. As shown in FIGS. 3 to 5, the lid portion 15 is fixed to the upper ends of the pair of side portions 142 and 143. The container 13 is formed by closing the opening 144 of the accommodating portion 14 by the lid portion 15.

  The stacked body 11 is accommodated in the container 13 so that the stacking direction of the mesh member 12 and the axial direction of the container 13 (direction from the first opening 131 toward the second opening 132) substantially coincide. Yes. In particular, in this embodiment, the extending direction of the plurality of first wires 121 included in the mesh member 12 is substantially the same as the magnetic field application direction (Z-axis direction in the drawing) in which a magnetic field is applied by the permanent magnet 40. The laminated body 11 is accommodated in the container 13 so as to be parallel to the container 13.

  When the mesh member 12 includes the second wire rod 122 ′ illustrated in FIG. 7B, the extending direction of the plurality of first wire rods 121 with respect to the magnetic field application direction is as described above. By accommodating the laminated body 11 in the container 13 so as to be substantially parallel, the longitudinal direction in the cross-sectional shape of the second wire rod 122 ′ becomes substantially parallel to the magnetic field application direction. For this reason, the influence of the demagnetizing field generated in the second wire rod 122 'can be reduced, and the magnetocaloric effect can be obtained effectively.

  As shown in FIGS. 3 and 4, the first terminal member (connection member) 16 includes a connection port 161 and a connection port 162 larger than the connection port 161. As the first terminal member 16, for example, a heat shrinkable tube, a resin molded product, a metal processed product, or the like can be used.

  One end of the container 13 is inserted into the connection port 162 of the first terminal member 16, and the first terminal member 16 is fixed to the end of the container 13. In addition, a first low temperature side pipe 81 is connected to the connection port 161 of the first terminal member 16, and as shown in FIG. 1, the first MCM heat exchanger 10 includes the first low temperature side pipe 81. The low temperature side heat exchanger 50 communicates with the low temperature side pipe 81.

  The second terminal member 17 has the same configuration as the first terminal member 16 described above. The other end of the container 13 is inserted into the connection port 172 of the second terminal member 17, and the second terminal member 17 is fixed to the end of the container 13. Further, a first high temperature side pipe 83 is connected to the connection port 171 of the second terminal member 17, and as shown in FIG. 1, the first MCM heat exchanger 10 has the first high temperature side pipe 83. The high temperature side heat exchanger 60 communicates with the high temperature side pipe 83.

  The laminated body 21 is also accommodated in the container 23 of the second MCM heat exchanger 20 (see FIG. 2), and the laminated body 21 is also configured by stacking a plurality of mesh members 22 on each other. As in the first MCM heat exchanger 10, one end of the container 23 is inserted into the first terminal member, and the first terminal member is fixed to the container 23. The other end of the container 23 is inserted into the second terminal member, and the second terminal member is fixed to the container 23. 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 connection port 261 of the first terminal member. 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 connection port 271 of the second terminal member.

  The mesh member 22 of the second MCM heat exchanger 20 has the same configuration as the mesh member 12 of the first MCM heat exchanger 10. The container 23 of the second MCM heat exchanger 20 has the same configuration as the container 13 of the first MCM heat exchanger 10. Further, the terminal member of the second MCM heat exchanger 20 has the same configuration as the terminal members 16 and 17 of the first MCM heat exchanger 10.

  For example, when the air conditioner using the magnetic heat pump device 1 in the present embodiment functions as cooling, the room is cooled by exchanging heat between the low temperature side heat exchanger 50 and the indoor air, The heat is radiated to the outside by performing heat exchange between the high temperature side heat exchanger 60 and the outside.

  On the other hand, when the air conditioner functions as heating, the room is warmed by exchanging heat between the high temperature side heat exchanger 60 and the indoor air, and the low temperature side heat exchanger 50 and the outdoor side. Heat is absorbed from outside by exchanging heat with other 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 liquid medium in the present embodiment corresponds to an example of a fluid in the present invention.

  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.

  In the present embodiment, the pair of permanent magnets 40 applies a magnetic field to the stacking direction of the plurality of mesh members 21 (22) when the MCM heat exchanger 10 (20) is interposed between the permanent magnets 40. It arrange | positions with respect to piston 30 so that a direction may be substantially orthogonal.

  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, 20 or the magnet becomes unnecessary. When using an electromagnet having a coil, the magnitude (intensity) of the magnetic field applied to the mesh members 12 and 22 instead of applying / removing the magnetic field to / from the mesh members 12 and 22 of the MCM heat exchangers 10 and 20. 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 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, referring FIG.1 and FIG.2.

  First, when the piston 30 is moved to the “first position” shown in FIG. 1, the wires 121 and 122 of the mesh member 12 of the first MCM heat exchanger 10 are demagnetized, and the temperature decreases. The wire of the mesh member 22 of the MCM heat exchanger 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.

  For this reason, the liquid medium is cooled by the wires 121 and 122 of the mesh member 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, and the low temperature The side heat exchanger 50 is cooled.

  At this time, in the first MCM heat exchanger 10, the liquid medium passes through the flow path 124 formed by the continuous mesh 123 of the mesh members 12 stacked on each other, and the wire members 121 and 122 of the mesh member 22. The liquid medium is cooled by the wires 121 and 122.

  On the other hand, the liquid medium is heated by the wire material of the mesh member 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 The exchanger 60 is heated.

  At this time, inside the second MCM heat exchanger 20, the liquid medium passes through the flow path formed by the mesh of the mesh members 22 stacked on each other and comes into contact with the wire of the mesh member 22. The liquid medium is heated by the wire material of the mesh member 22.

  Next, when the piston 30 is moved to the “second position” shown in FIG. 2, the wires 121 and 122 of the mesh member 12 of the first MCM heat exchanger 10 are magnetized and the temperature rises. The wire of the mesh 22 of the second MCM heat exchanger 20 is 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 of the mesh member 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 exchange is performed. The vessel 50 is cooled.

  At this time, inside the second MCM heat exchanger 20, the liquid medium passes through the flow path formed by the mesh of the mesh members 22 stacked on each other and comes into contact with the wire of the mesh member 22. The liquid medium is cooled by the wire material of the mesh member 22.

  On the other hand, the liquid medium is heated by the wires 121 and 122 of the mesh member 12 of the first MCM heat exchanger 10 that has been magnetized and the temperature thereof is increased, and the liquid medium is supplied to the high temperature side heat exchanger 60 to 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 124 formed by the continuous mesh 123 of the mesh members 12 stacked on each other, and the wire members 121 and 122 of the mesh member 22. The liquid medium is heated by the wires 121 and 122.

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

  As described above, in the present embodiment, the mesh member 12 is configured by weaving the first and second wires 121 and 122 made of the magnetocaloric effect material with respect to the first MCM heat exchanger 10. Since the mesh member 12 has rigidity capable of withstanding the pressure of the liquid medium, even if the first and second wire rods 121 and 122 are thinned, the first and second wire rods 121 and 122 due to the pressure of the liquid medium are used. The deformation and breakage of 122 can be suppressed.

  In general, if the magnetic field application direction is parallel to the longitudinal direction of the magnetocaloric effect material, the influence of the demagnetizing field is reduced, whereas the magnetic field application direction is relative to the longitudinal direction of the magnetocaloric effect material. If they are orthogonal, the influence of the demagnetizing field becomes large.

In this regard, in the present embodiment, in each of the mesh member 12, a second pitch P ₂ of the second wire 122 substantially orthogonal to the magnetic field application direction, substantially to the magnetic field application direction It is relatively wide with respect to the first pitch P ₁ of the parallel first wire 121 (P ₂ > P ₁ ). For this reason, compared with the case where the pitch of the 1st wire and the pitch of the 2nd wire are the same, the number of the 2nd wires 122 whose longitudinal direction is orthogonal to the magnetic field application direction can be reduced. Since the influence of the demagnetizing field can be reduced, the magnetocaloric effect can be effectively obtained.

  Similarly, with respect to the second MCM heat exchanger, the mesh member 22 is configured by weaving the first and second wires made of the magnetocaloric effect material. For this reason, since the mesh member 22 has rigidity capable of withstanding the pressure of the liquid medium, even if the first and second wires are thinned, the deformation of the first and second wires due to the pressure of the liquid medium Breakage can be suppressed.

  In each mesh member 22, the second pitch of the second wire rods adjacent to each other is relatively wider than the first pitch of the first wire rods adjacent to each other. For this reason, since the influence of a demagnetizing field can be reduced, the magnetocaloric effect can be obtained effectively.

  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 number of MCM heat exchangers included in the magnetic heat pump device is not particularly limited. For example, the magnetic heat pump device may include one or three or more MCM heat exchangers.

  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.

  Moreover, in this embodiment, although the 1st and 2nd MCM heat exchangers 10 and 20 have the same structure, it is not limited to this in particular, These may have a different structure. For example, in the first and second MCM heat exchangers 10 and 20, mesh members having different specifications may be used, or the number of mesh members stacked may be different.

DESCRIPTION OF SYMBOLS 1 ... Magnetic heat pump apparatus 10 ... 1st MCM heat exchanger 11 ... 1st laminated body 12 ... Mesh member 121 ... 1st wire 122, 122 '... 2nd wire 123 ... Mesh 124 ... Channel 125 ... Adhesion Agent 13 ... Container 131 ... First opening 132 ... Second opening 14 ... Storage part 141 Bottom 142, 143 ... Side part
144: Opening 15 ... Lid 16 ... First terminal member 161 ... Connection port 162 ... Connection port 17 ... Second terminal member 171 ... Connection port 172 ... Connection port 20 ... Second MCM heat exchanger 21 ... Second 22 ... 2nd mesh member 23 ... Container 261 ... 1st connection port 271 ... 2nd connection port 30 ... Piston 35 ... Actuator 40 ... Permanent magnet 50 ... Low temperature side heat exchanger 60 ... High temperature side heat exchange 70 ... Pump 81-82 ... First and second low temperature side pipes 83-84 ... Third to fourth high temperature side pipes 90 ... Switching valve

Claims (7)

A plurality of mesh members stacked on each other;
A container for accommodating a plurality of mesh members,
Each of the mesh members is configured by weaving a plurality of linear bodies,
The plurality of linear bodies are:
A plurality of first linear bodies extending along a first direction;
A plurality of second linear bodies extending along a second direction intersecting the first direction,
The first and second linear bodies are composed of a magnetocaloric effect material having a magnetocaloric effect,
The pitch of the second linear bodies adjacent to each other is a heat exchanger relatively wide with respect to the pitch of the first linear bodies adjacent to each other. The heat exchanger according to claim 1,
The first direction is substantially parallel to the direction of the magnetic field applied to the linear body;
The container 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 and a stacking direction of the mesh members are substantially parallel. The heat exchanger according to claim 1 or 2,
The number of the 1st linear bodies which each said mesh member has is a heat exchanger relatively many with respect to the number of said 2nd linear bodies which each said mesh member has. It is a heat exchanger as described in any one of Claims 1-3,
The second linear body is a heat exchanger in which a length along the first direction has a relatively large cross-sectional shape with respect to a length along the stacking direction. It is a heat exchanger as described in any one of Claims 1-4,
The plurality of mesh members are partially bonded to each other or non-bonded to each other. At least one heat exchanger according to any one of claims 1 to 5;
Magnetic field changing means for changing the magnitude of the magnetic field while applying a magnetic field to the linear body,
The magnetic field changer is a magnetic heat pump device provided such that the direction in which a magnetic field is applied is substantially orthogonal to the stacking direction of the plurality of mesh members. The magnetic heat pump device according to claim 6,
The magnetic heat pump device is:
First and second external heat exchangers respectively connected to the heat exchanger via piping;
Fluid that supplies fluid from the heat exchanger to the first external heat exchanger or the second external heat exchanger in accordance with a change in the magnitude of the magnetic field applied to the mesh member by the magnetic change means And a magnetic heat pump device.

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