JP2017009164A - Heat exchanger and magnetic heat pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanging section capable of improving heat exchange efficiency.SOLUTION: An MCM heat exchanger 10 used in a magnetic heat pump device 1 includes a magnetocaloric effect material 12 having a magnetocaloric effect, and a container 15 storing the magnetocaloric effect material 12, and the container 15 has a first opening 161 through which a liquid medium flows into the container 15 or flows out of the container 15, and a second opening 171 through which the liquid medium flows out of the container 15 or flows into the container 15. A length of the magnetocaloric effect material 12 along a direction CL from the first opening 161 to the second opening 171 is longest at a portion closest to a virtual straight line VL which connects the first opening 161 and the second opening 171.SELECTED DRAWING: Figure 3

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 device including a heat exchange container filled with magnetic material for magnetic refrigeration that is substantially spherical particles is known (see, for example, Patent Document 1 (paragraphs [0038] to [0039], FIG. 2)). . This heat exchange container has one opening connected to the low temperature side heat exchange part via piping, and the other opening connected to the high temperature side heat exchange part via another pipe.

JP 2010-77484 A

  The cross-sectional area of the heat exchange container is relatively larger than the cross-sectional area of each opening. For this reason, there is a problem that the flow rate of the liquid refrigerant decreases as the distance from the central axis of the opening increases, so that the liquid refrigerant does not flow uniformly inside the heat exchange container and the heat exchange efficiency decreases.

  The problem to be solved by the present invention is to provide a heat exchange section capable of improving the heat exchange efficiency, and a magnetic heat pump apparatus including the heat exchange section.

  [1] A heat exchanger according to the present invention is a heat exchanger used in a magnetic heat pump apparatus, and includes a magnetocaloric effect material having a magnetocaloric effect, and a container for housing the magnetocaloric effect material. The container has a first opening through which fluid flows into or out of the container, and a second opening through which the fluid flows out of the container or into the container. The length of the magnetocaloric effect material along the first direction from the first opening toward the second opening is closest to an imaginary straight line connecting the first opening and the second opening. It is the longest heat exchanger.

  [2] In the above invention, the length of the magnetocaloric effect material along the first direction may be gradually or stepwise increased as it approaches the virtual line.

  [3] In the above invention, the heat exchanger includes a plurality of plate members made of the magnetocaloric effect material, and the plurality of plate members are arranged at intervals or stacked on each other, and The length of the magnetocaloric effect material along the first direction is accommodated in the container so that the extending direction of the plate is substantially parallel to the first direction. It may be a length along the first direction.

  [4] In the above invention, the length of the plate located closest to the virtual line along the first direction may be the longest among the plurality of plates.

  [5] In the above invention, the length of the plurality of plate members along the first direction may be gradually or stepwise increased as the virtual line is approached.

  [6] In the above invention, the heat exchanger includes a plurality of wires composed of the magnetocaloric effect material, the plurality of wires are bundled together, and the extending direction of the wires is the The container is accommodated in the container so as to be substantially parallel to the first direction, and the length of the magnetocaloric effect material along the first direction is along the first direction of the wire. It may be a length.

  [7] In the above invention, the length of the wire positioned closest to the virtual straight line along the first direction may be the longest among the plurality of wires.

  [8] In the above invention, the lengths of the plurality of wires along the first direction may be gradually or stepwise increased as the virtual line is approached.

  [9] In the above invention, the heat exchanger is composed of the magnetocaloric effect material, includes a plurality of granules filled in the container, and the magnetocaloric effect material along the first direction. The length of may be the length of a plurality of the granular materials continuous along the first direction.

  [10] In the above invention, the lengths of the plurality of granular materials continuous along the first direction may be the longest and closest to the virtual line.

  [11] In the above invention, the lengths of the plurality of granular materials continuous along the first direction may be gradually or stepwise increased as approaching the virtual straight line.

  [12] In the above invention, the container has a cylindrical first taper portion that tapers toward the first opening, and a cylindrical second taper that tapers toward the second opening. And a cylindrical body portion that connects the first tapered portion and the second tapered portion.

  [13] In the above invention, in the first direction, the first opening and the second opening may overlap.

  [14] A 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 a pipe. The first and second external heat exchangers respectively connected to the container and the fluid is supplied from the container to the first or second external heat exchanger in conjunction with the operation of the magnetic field changing means. And a fluid heat supply device.

  According to the present invention, the length of the magnetocaloric effect material along the first direction is the longest closest to the virtual straight line. Thereby, since the flow velocity of the fluid in the container is made uniform, the heat exchange efficiency of the heat exchanger can be improved.

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 a cross-sectional view of the MCM heat exchanger according to the embodiment of the present invention, and is a view cut along the flow direction of the liquid medium. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view taken along line VV in FIG. FIG. 6 is a perspective view showing a modification of the plate material in the embodiment of the present invention. FIG. 7 is a perspective view showing another modified example of the plate material in the embodiment of the present invention. FIG. 8 is a cross-sectional view showing a first modification of MCM heat exchange in the embodiment of the present invention. FIG. 9 is a cross-sectional view showing a second modification of the MCM heat exchanger in the embodiment of the present invention, and is a view cut along the flow direction of the liquid medium. FIG. 10 is a cross-sectional view taken along line XX in FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. FIG. 12 is a cross-sectional view showing a third modification of the MCM heat exchanger in the embodiment of the present invention, and is a view cut along the flow direction of the liquid medium. 13 is a cross-sectional view taken along line XIII-XIII in FIG. 14 is a cross-sectional view taken along line XIV-XIV 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 apparatus in the present embodiment, and FIGS. 3 to 5 are views showing an MCM heat exchanger in the present embodiment.

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

  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 plurality of plate members 12 and a container 15 that houses the plate members 12. In addition, since the structure of the 1st MCM heat exchanger 10 and the structure of the 2nd MCM heat exchanger 20 are the same, the structure of the 1st MCM heat exchanger 10 is demonstrated in detail below, and 2nd Description of the configuration of the MCM heat exchanger 20 will be omitted.

  Each plate member 12 is composed of a member obtained by forming a magnetocaloric effect material (MCM) having a magnetocaloric effect into a plate shape by plastic working or the like. When a magnetic field is applied to the plate 12 made of this MCM, the magnetic entropy is reduced by aligning the electron spin, and the plate 12 generates heat and the temperature rises. On the other hand, when the magnetic field is removed from the plate 12, the electron spin becomes messy and the magnetic entropy increases, and the plate 12 absorbs heat and the temperature decreases. Note that the plate-like shape in the present embodiment includes a foil material having a thickness of about 0.1 mm.

  The MCM that constitutes the plate material 12 is not particularly limited as long as it is a magnetic material. It is preferable that it is a magnetic body. Specific examples of such MCMs include gadolinium (Gd), gadolinium alloys, lanthanum-iron-silicon (La-Fe-Si) compounds, and the like.

  The several board | plate material 12 is accommodated in the container 15 of the 1st MCM heat exchanger 10, as shown in FIGS. First and second openings 161 and 171 are formed at the front and rear ends of the container 15, respectively. The internal space 151 of the container 15 communicates with the first low temperature side pipe 81 through the first opening 161 and also communicates with the first high temperature side pipe 83 through the second opening 171. ing.

  A plurality of pairs of grooves 152 a and 152 b that support the plurality of plate members 12 are formed on the inner peripheral surface 152 of the container 15. The plurality of first grooves 152a are substantially in the liquid medium flow direction CL in the container 15 (that is, the direction from the first opening 161 of the container 15 toward the second opening 171; the X direction in the figure). It is a straight groove extending in parallel. The plurality of first grooves 152a are arranged on the inner peripheral surface 152 of the container 15 so as to be arranged at substantially equal intervals in the Z direction in the drawing.

  The plurality of second grooves 152b are also linear grooves extending substantially parallel to the above-described flow direction CL. The plurality of second grooves 152b are provided so as to face the first grooves 152a, and are arranged on the inner peripheral surface 152 of the container 15 so as to be arranged at substantially equal intervals in the Z direction in the drawing. ing.

  The plurality of plate members 12 are arranged so that the extending direction of the plate member 12 is substantially parallel to the flow direction CL (that is, the extending direction of the plate member 12 is substantially the XY plane direction in the figure). In the interior space 151 of the container 15. One side end of the plate member 12 is inserted into the first groove 152a, and the other side end of the plate member 12 is inserted into the second groove 152b. Thereby, each plate 12 is supported by the inner peripheral surface 152 of the container 15.

  At this time, as described above, the first grooves 152a are arranged at substantially equal intervals, and the second grooves 152b are also arranged at substantially equal intervals. For this reason, in the state where the plurality of plate members 12 are supported by the inner peripheral surface 152, a gap 153 is formed between the plate members 12 adjacent to each other.

  FIG. 6 is a diagram showing a modification of the plate material in the present embodiment, and FIG. 7 is a diagram showing another modification of the plate material in the present embodiment.

  As shown in FIG. 6, the plate material 12 </ b> B may have a shape folded in two at the bent portion 121. In this case, the bent portion 121 is inserted into the first groove 152a, and the side end of the plate member 12B opposite to the bent portion 121 is inserted into the second groove 152b. 12B is supported by the inner peripheral surface 152 of the container 15.

  Moreover, as shown in FIG. 7, 12 C of board | plate materials may have the bending parts 122 and 123 in both side edge parts, respectively. In this case, the plurality of plate members 12 </ b> C are directly stacked to form the stacked body 11, and the stacked body 11 is accommodated in the internal space 151 of the container 15. When the plurality of plate members 12C are directly stacked, a gap 124 is formed between the plate members 12B adjacent to each other by the bent portions 122 and 123. For this reason, the grooves 152a and 152b on the inner peripheral surface 152 of the container 15 are not necessary.

  Returning to FIG. 3 to FIG. 5, the container 15 in the present embodiment has a spindle shape formed of a first tapered portion 16, a second tapered portion 17, and a body portion 18. . In the present embodiment, the container 15 has a circular cross-sectional shape. However, the present invention is not particularly limited thereto. For example, the container 15 may have a rectangular cross-sectional shape.

  The first tapered portion 16 has a cylindrical shape whose diameter decreases toward the first opening 161. The second tapered portion 17 also has a cylindrical shape whose diameter decreases toward the second opening 171. The central axis of the first taper portion 16 and the central axis of the second taper portion 17 coincide with each other, and when viewed along the above-described flow direction CL, the entire first opening 161 is the second It overlaps with the entire opening 171. The positional relationship between the first opening and the second opening when viewed along the distribution direction CL is not particularly limited as long as the first opening and the second opening partially overlap. .

  The body portion 18 has a straight cylindrical shape having the same diameter and extending in the axial direction (X direction in the figure), and is interposed between the first taper portion 16 and the second taper portion 17. Thus, the first and second tapered portions 16 and 17 are connected. The trunk portion 18 has a diameter larger than the diameter of the pipes 81 and 83 described above, and is not particularly limited. For example, the trunk portion 18 has a diameter about three times the diameter of the pipes 81 and 83. .

And the some board | plate material 12 in this embodiment has a planar shape corresponding to the shape of the internal space 151 of the container 15, respectively. For example, the plate material 12 a closest to the virtual straight line VL connecting the first opening 161 and the second opening 171 has the longest length L _max among all the plate materials 12. On the other hand, the plate member 12z farthest from the virtual straight line VL has the shortest length L _min among all the plate members 12.

  In the present embodiment, the “plate material 12a closest to the virtual straight line VL” includes the plate material 12a positioned on the virtual straight line VL. In addition, the length along the flow direction CL of the plate 12 in the present embodiment corresponds to an example of “the length of the magnetocaloric effect material along the first direction” in the present invention.

  Thus, in this embodiment, the length along the flow direction CL of the plurality of plate members 12 accommodated in the container 15 is gradually increased as it approaches the virtual straight line VL. For this reason, at a position close to the virtual straight line VL in the internal space 151 of the container 15, the pressure loss of the liquid medium increases and the flow speed of the liquid medium decreases. On the other hand, at a position away from the virtual straight line VL in the internal space 151 of the container 15, the pressure loss of the liquid medium is reduced and the flow speed of the liquid medium is increased. Thereby, since the flow velocity of the liquid medium in the container 15 is made uniform, the heat exchange efficiency of the first MCM heat exchanger 10 is improved.

  In this example, the “position close to the virtual straight line VL in the internal space 151 of the container 15” means a virtual straight line in the internal space 151 in the radial direction (Z direction in the drawing) centered on the virtual straight line VL. It means a position close to VL. The “position away from the virtual straight line VL in the internal space 151 of the container 15” means that the radial direction centering on the virtual straight line VL (the Z direction in the drawing) is separated from the virtual straight line VL in the internal space 151. Means the position.

  FIG. 8 is a cross-sectional view showing a first modification of the MCM heat exchanger in the present embodiment.

  In addition, as shown in FIG. 8, the length of the some board | plate material 12 accommodated in the container 15 may become long in steps as it approximates the virtual straight line VL. Also in the case of the first modification, the flow rate of the liquid medium in the container 15 is made uniform, so that the heat exchange efficiency of the first MCM heat exchanger 10 is improved.

  9-11 is a figure which shows the 2nd modification of the MCM heat exchanger in this embodiment.

  As shown in FIGS. 9 to 11, a plurality of wires 13 may be accommodated in a container 15 instead of the plate 12. The plurality of wires 13 are bundled with each other and are accommodated in the internal space 151 of the container 15 so that the extending direction of the wires 13 is substantially parallel to the flow direction CL. The wire 13 is, for example, a wire having a circular cross-sectional shape. Note that the cross-sectional shape of the wire 13 is not particularly limited as long as the gap 131 (see FIG. 11) can be formed between the adjacent wires 13 when the wires 13 are bundled.

Also in this 2nd modification, the some wire 13 has the length corresponding to the shape of the internal space 151 of the container 15, respectively. For example, the wire 13a closest to the virtual straight line VL connecting the first opening 161 and the second opening 171 has the longest length _Lmax among all the wires 13. In contrast, the farthest wire 13z from the virtual straight line VL has the shortest length L _min of all of the wire 13.

  In the present embodiment, the “wire 13a closest to the virtual straight line VL” includes the wire 13a positioned on the virtual straight line VL. Further, the length along the flow direction CL of the wire 13 in the present embodiment corresponds to an example of “the length of the magnetocaloric effect material along the first direction” in the present invention.

  Also in the second modification, at a position close to the virtual straight line VL in the internal space 151 of the container 15, the pressure loss of the liquid medium increases and the flow speed of the liquid medium decreases. On the other hand, at a position away from the virtual straight line VL in the internal space 151 of the container 15, the pressure loss of the liquid medium is reduced and the flow speed of the liquid medium is increased. Thereby, since the flow velocity of the liquid medium in the container 15 is made uniform, the heat exchange efficiency of the first MCM heat exchanger 10 is improved.

  In this example, “a position close to the virtual straight line VL in the internal space 151 of the container 15” means the virtual straight line VL in the internal space 151 in the radial direction (YZ plane direction in the drawing) centered on the virtual straight line VL. Means a position close to. Further, “a position away from the virtual straight line VL in the internal space 151 of the container 15” refers to the virtual straight line VL in the internal space 151 in the radial direction (YZ plane direction in the drawing) centered on the virtual straight line VL. It means a distant position.

  In addition, in this example, although the length of the some wire 13 accommodated in the container 15 becomes long gradually as it approaches the virtual straight line VL, it is not limited to this in particular. The lengths of the plurality of wires 13 accommodated in the container 15 may be increased stepwise as they approach the virtual straight line VL.

  12-14 is a figure which shows the 3rd modification of the MCM heat exchanger in this embodiment.

  As shown in FIGS. 12 to 14, a plurality of granular materials 14 may be filled in the container 15 instead of the plate material 12. The granular material 14 has, for example, a spherical shape, but when the granular material 14 is filled in the container 15, a gap 141 (see FIG. 14) can be formed between the adjacent granular materials 14. If there is, the shape of the granular material 14 is not particularly limited.

In the third modified example, since the internal space 151 of the container 15 is filled with a large number of granular materials 14, the internal space 151 of the container 15 is continuous along the flow direction CL at a position closest to the virtual straight line VL. The length of the granular material 14 is the longest (L _max in FIG. 12). On the other hand, in the inner space 151 of the container 15, the length of the granular material 14 continuous along the flow direction CL is the shortest at the position farthest from the virtual straight line VL (L _min in FIG. 12).

  In the present embodiment, “the plurality of granular materials 14 connected in the vicinity of the virtual straight line VL along the flow direction CL” also includes the granular material 14 positioned on the virtual straight line VL. In addition, “the length of the plurality of granular materials 14 continuous along the flow direction CL” in the present embodiment corresponds to an example of “the length of the magnetocaloric effect material along the first direction” in the present invention.

  Also in the third modification, the pressure loss of the liquid medium increases and the flow speed of the liquid medium decreases at a position close to the virtual straight line VL in the internal space 151 of the container 15. On the other hand, at a position away from the virtual straight line VL in the internal space 151 of the container 15, the pressure loss of the liquid medium is reduced and the flow speed of the liquid medium is increased. Thereby, since the flow velocity of the liquid medium in the container 15 is made uniform, the heat exchange efficiency of the first MCM heat exchanger 10 is improved.

  In this example, “a position close to the virtual straight line VL in the internal space 151 of the container 15” means the virtual straight line VL in the internal space 151 in the radial direction (YZ plane direction in the drawing) centered on the virtual straight line VL. Means a position close to. Further, “a position away from the virtual straight line VL in the internal space 151 of the container 15” refers to the virtual straight line VL in the internal space 151 in the radial direction (YZ plane direction in the drawing) centered on the virtual straight line VL. It means a distant position.

  In addition, in this example, although the length of the granular material 14 which continues along the distribution direction CL becomes gradually long as it approaches the virtual straight line VL, it is not specifically limited to this. The length of the granular material 14 which continues along the distribution direction CL may become longer stepwise as it approaches the virtual straight line VL.

  Returning to FIG. 1, the internal space 151 of the container 15 communicates with the low-temperature side heat exchanger 50 via the first low-temperature side pipe 81 connected to the first opening 161 and the second opening. It communicates with the high temperature side heat exchanger 60 via the first high temperature side pipe 83 connected to 171.

  As shown in FIG. 2, the container of the second MCM heat exchanger 20 also has an internal space 251 in which the plate material 22 is accommodated and the first and second openings 261 and 271 are formed. The first opening 261 communicates with the low temperature side heat exchanger 50 via the second low temperature side pipe 82. On the other hand, the second opening 271 communicates with the high temperature side heat exchanger 60 via the second high temperature side pipe 84.

  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. . As an example of the actuator 35, for example, a motor or an air cylinder provided with a ball screw mechanism can be exemplified.

  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, 20 or the magnet becomes unnecessary. In addition, when an electromagnet having a coil is used, the magnitude of the magnetic field applied to the plate members 12 and 22 is changed instead of the application / removal of the magnetic field to the plate members 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 by the pump 70 to the first MCM heat exchanger 10 or the second MCM heat exchanger 20 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 plate material 12 of the first MCM heat exchanger 10 is demagnetized to lower the temperature, while the second MCM heat exchanger 20. The plate material 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 plate material 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 gap 153 formed between the plates 12 and comes into contact with the plates 12, so that the liquid medium is cooled by the plates 12. . Moreover, in this embodiment, since the length of the some board | plate material 12 accommodated in the container 15 becomes long gradually as it approaches the virtual straight line VL, the uniformization of the flow velocity of the liquid medium in the container 15 is carried out. It is illustrated.

  On the other hand, the liquid medium is heated by the plate material 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, inside the second MCM heat exchanger 20, the liquid medium passes through the gap formed between the plate members 22 and comes into contact with the plate member 22, whereby the liquid medium is heated by the plate member 22. Moreover, in this embodiment, since the length of the some board | plate material 22 accommodated in the container 25 becomes gradually long as the virtual straight line VL is approached, the flow velocity of the liquid medium in the container 25 is equalized. It is illustrated.

  Next, when the piston 30 is moved to the “second position” shown in FIG. 2, the plate material 12 of the first MCM heat exchanger 10 is magnetized to increase the temperature, while the second MCM heat exchanger The 20 plate members 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 plate material 22 of the second MCM heat exchanger 20 whose temperature has decreased due to demagnetization, and the liquid medium is supplied to the low temperature side heat exchanger 50, so that the low temperature side heat exchanger 50 is To be cooled.

  At this time, inside the second MCM heat exchanger 20, the liquid medium passes through the gap formed between the plate members 22 and comes into contact with the plate member 22, whereby the liquid medium is cooled by the plate member 22. Moreover, in this embodiment, since the length of the some board | plate material 22 accommodated in the container 25 becomes long gradually as it approaches the virtual straight line VL, the flow velocity of the liquid medium in the container 25 is equalized. It is illustrated.

  On the other hand, the liquid medium is heated by the plate material 12 of the first MCM heat exchanger 10 that has been magnetized and the temperature is increased, 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 gap 153 formed between the plates 12 and comes into contact with the plates 12, so that the liquid medium is heated by the plates 12. . Moreover, in this embodiment, since the length of the some board | plate material 12 accommodated in the container 15 becomes long gradually as it approximates the virtual straight line VL, the flow velocity of the liquid medium in the container 15 is equalized. It is illustrated.

  Then, the reciprocating movement between the “first position” and the “second position” of the piston 30 described above is repeated, and the plate members 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.

  As described above, in the present embodiment, in the first MCM heat exchanger 10, the length of the plate material 12 along the flow direction CL is the longest closest to the virtual straight line VL. For this reason, since the flow velocity of the liquid medium in the container 15 is made uniform, the heat exchange efficiency of the first MCM heat exchanger 10 can be improved.

  Also in the second MCM heat exchanger 20, the length of the plate member 22 along the flow direction is the longest closest to the virtual straight line. For this reason, since the flow velocity of the liquid medium in the container 25 is made uniform, the heat exchange efficiency of the second MCM heat exchanger 20 can be improved.

  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.

DESCRIPTION OF SYMBOLS 1 ... Magnetic heat pump apparatus 10 ... 1st MCM heat exchanger 11 ... Laminate body 12,12B, 12C ... Plate material 121-123 ... Bending part 124 ... Gap 13 ... Wire rod 131 ... Gap 14 ... Granule material 141 ... Gap 15 ... Container 151 ... Internal space 152 ... Inner peripheral surface
152a ... first groove
152b ... second groove 153 ... gap 16 ... first taper 161 ... first opening 17 ... second taper 171 ... second opening 18 ... body 20 ... second MCM heat exchanger 22 ... Plate material 25 ... Container 251 ... Internal space 261 ... First opening 271 ... Second opening 30 ... Piston 35 ... Actuator 40 ... Permanent magnet 50 ... Low temperature side heat exchanger 60 ... High temperature side heat exchanger 70 ... Pump 81-82 ... 1st-2nd low temperature side piping 83-84 ... 3rd-4th high temperature side piping 90 ... Switching valve

Claims (8)

A heat exchanger used in a magnetic heat pump device,
A magnetocaloric material having a magnetocaloric effect;
A container for containing the magnetocaloric effect material,
The container is
A first opening through which fluid flows into or out of the container;
A second opening through which the fluid flows out of or into the container;
The length of the magnetocaloric effect material along the first direction from the first opening toward the second opening is closest to an imaginary straight line connecting the first opening and the second opening. The heat exchanger that is the longest. The heat exchanger according to claim 1,
The length of the magnetocaloric effect material along the first direction is increased gradually or stepwise as it approaches the virtual straight line. The heat exchanger according to claim 1 or 2,
The heat exchanger includes a plurality of plates made of the magnetocaloric effect material,
The plurality of plate members are disposed in the container so as to be spaced apart from each other or stacked on each other, and so that the extending direction of the plate members is substantially parallel to the first direction. ,
The length of the magnetocaloric effect material along the first direction is a length of the plate material along the first direction. The heat exchanger according to claim 1 or 2,
The heat exchanger includes a plurality of wires composed of the magnetocaloric effect material,
The plurality of wires are bundled with each other and housed in the container so that the extending direction of the wires is substantially parallel to the first direction,
The length of the magnetocaloric effect material along the first direction is a length of the wire along the first direction. The heat exchanger according to claim 1 or 2,
The heat exchanger is composed of the magnetocaloric effect material, and includes a plurality of granules filled in the container,
The length of the magnetocaloric effect material along the first direction is a length of a plurality of the granular materials that are continuous along the first direction. It is a heat exchanger as described in any one of Claims 1-5,
The container is
A cylindrical first taper portion that tapers toward the first opening;
A cylindrical second taper portion that tapers toward the second opening;
A heat exchanger comprising: the first tapered portion and a cylindrical body portion that connects the second tapered portion. It is a heat exchanger as described in any one of Claims 1-6,
The heat exchanger in which the first opening and the second opening overlap in the first direction. At least one heat exchanger according to any one of claims 1 to 7;
A magnetic field changing means for applying a magnetic field to the magnetocaloric effect material and changing the magnitude of the magnetic field;
First and second external heat exchangers respectively connected to the vessel via piping;
And a fluid supply means for supplying the fluid from the container to the first or second external heat exchanger in conjunction with the operation of the magnetic field changing means.

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