JP2018124029A - Magnetic heat pump device - Google Patents

Abstract

A magnetic heat pump device capable of operating efficiently is provided. A magnetic heat pump device 1 applies a magnetic field to a linear body, an MCM heat exchanger 10 including a linear body 12 that exhibits a magnetocaloric effect, and a case 13 in which the linear body is accommodated. Magnetic field changing unit 20 that changes the strength of the magnetic field, high temperature side heat exchanger 30 connected to one end of the MCM heat exchanger, low temperature heat exchanger 40 connected to the other end of the MCM heat exchanger, and magnetic field change A heat medium moving unit 50 that moves the heat medium from one end side to the other end side or from the other end side to the one end side in accordance with the change in the strength of the magnetic field applied to the linear body by the unit; A bypass pipe 70 that directly connects the other end side and bypasses the MCM heat exchanger, and a flow rate adjusting valve 80 that is provided in the bypass pipe and adjusts the flow rate of the heat medium passing through the bypass pipe are provided. [Selection] Figure 1

Description

  The present invention relates to a magnetic heat pump device using a magnetocaloric effect.

  2. Description of the Related Art As a magnetocaloric effect type heat pump, a swash plate type piston pump is known as a heat transport device for flowing a heat transport medium that exchanges heat with a magnetocaloric element (see, for example, Patent Document 1).

JP 2014-209041 A

  In the heat pump, it is difficult to increase or decrease the transport amount of the heat transport medium passing through the magnetocaloric element according to the operation state of the heat pump. For this reason, there is a problem that the heat pump cannot be operated efficiently.

  The problem to be solved by the present invention is to provide a magnetic heat pump device that can be operated efficiently.

[1] A magnetic heat pump device according to the present invention includes a heat exchanger including a magnetic body that exhibits a magnetocaloric effect, a case in which the magnetic body is accommodated, a magnetic field applied to the magnetic body, and the magnetic field Magnetic field changing means for changing the strength, a first external heat exchanger connected to one end of the heat exchanger, a second external heat exchanger connected to the other end of the heat exchanger, and the magnetic field Heat that moves the heat medium from the one end side to the other end side or from the other end side to the one end side in accordance with changing the strength of the magnetic field applied to the magnetic body by the changing means. A medium moving means, a bypass flow path that directly connects the one end side and the other end side to bypass the heat exchanger, a flow rate of the heat medium that is provided in the bypass flow path and passes through the bypass flow path A flow rate adjusting means for adjusting the magnetic heat A pump device.

[2] In the above invention, when the heat medium moves from the one end side toward the other end side, the flow rate of the heat medium passing through the bypass channel, and from the other end side toward the one end side. The flow rate adjusting means may operate so that the flow rate of the heat medium passing through the bypass flow path when the heat medium moves is different from each other.

[3] In the above invention, the heat medium moving means may have at least one piston cylinder.

  According to the present invention, since the flow rate of the heat medium passing through the heat exchanger can be adjusted, the magnetic heat pump device can be operated efficiently.

FIG. 1 is an overall configuration diagram of a magnetic heat pump device according to an embodiment of the present invention, and shows a state where a permanent magnet is in a first position. FIG. 2 is an overall configuration diagram of the magnetic heat pump device according to the embodiment of the present invention, and shows a state where the permanent magnet is in the second position. FIG. 3 is an exploded perspective view showing the configuration of the MCM heat exchanger according to one embodiment of the present invention. FIG. 4 is a cross-sectional view along the extending direction of the MCM heat exchanger according to the embodiment of the present invention. FIG. 5 is a graph showing the relationship between the output W and the temperature span ΔT in the magnetic heat pump device according to one embodiment of the present invention. FIG. 6 is a graph showing a change in output W, a change in temperature span ΔT, and a change in energy efficiency COP with respect to the flow rate of the heat medium passing through the MCM heat exchanger in the magnetic heat pump apparatus according to the embodiment of the present invention. .

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

  FIG. 1 is an overall configuration diagram of a magnetic heat pump device according to an embodiment of the present invention, showing a state in which a permanent magnet is in a first position, and FIG. 2 is a magnetic heat pump according to an embodiment of the present invention. It is a whole block diagram of an apparatus, and is a figure which shows the state which has a permanent magnet in a 2nd position, FIG. 3 is an exploded perspective view which shows the structure of the MCM heat exchanger which concerns on one embodiment of this invention, FIG. It is sectional drawing along the extension direction of the MCM heat exchanger which concerns on one embodiment of invention.

  A magnetic heat pump device 1 shown in FIG. 1 and FIG. 2 is a heat pump device using a magnetocaloric effect, and is applied to an air conditioner for home use or automobiles. This magnetic heat pump device 1 is connected to an MCM heat exchanger 10, a magnetic changing unit 20 that applies / removes a magnetic field to / from the MCM heat exchanger 10, and one end (high temperature end) of the MCM heat exchanger 10. Heat medium having a high temperature side heat exchanger 30, a low temperature side heat exchanger 40 connected to the other end (low temperature end) of the MCM heat exchanger 10, a first piston cylinder 51 and a second piston cylinder 52. The moving part 50, the piping 60a-60d which lets a heat medium pass, and the bypass piping 70, and the flow regulating valve 80 provided in the bypass piping 70 are provided. In this magnetic heat pump device 1, the first piston cylinder 51, the high temperature side heat exchanger 30, the MCM heat exchanger 10, the low temperature side heat exchanger 40, and the second piston cylinder 52 are arranged in this order from the piping 60a to the piping. The first piston cylinder 51 and the second piston cylinder 52 are disposed at one end of the pipe 60a and the other end of the pipe 60d, respectively. In addition, as a heat medium, liquid fluids, such as water, an antifreeze, ethanol solution, or these mixtures, can be used, for example.

  As shown in FIGS. 3 and 4, the MCM heat exchanger 10 includes an assembly 11 composed of a plurality of linear bodies 12, a case 13 in which the assembly 11 is accommodated, and a first connected to the case 13. The adapter 14 and the second adapter 15 are included.

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

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

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

  Although it does not specifically limit as a wire diameter of the linear body 12, For example, it is preferable that it is 0.01-1 mm. At this time, the plurality of linear bodies 12 constituting the aggregate 11 may have substantially the same wire diameter, or may have a mixture of different wire diameters.

  The aggregate 11 of the linear bodies 12 is accommodated in a case 13. As shown in FIGS. 3 and 4, the case 13 is configured in a rectangular cylindrical shape. A first opening 131 and a second opening 132 are respectively formed at one end and the other end of the case 13 in the axial direction. The linear body 12 extends linearly, and the extending direction of the linear body 12 substantially coincides with the axial direction of the case 13. Further, the centers of the first opening 131 and the second opening 132 are located coaxially with the center of the assembly 11. The plurality of linear bodies 12 may be twisted together. In this case, a large number of linear bodies 12 constituting the aggregate 11 may be divided into groups of two or three, and the two or three linear bodies 12 of each group may be twisted together.

  The case 13 includes an accommodating portion 13a whose cross-sectional shape in a cross section orthogonal to the axial direction is U-shaped (substantially U-shaped), and a rectangular plate-shaped lid portion 13b. The end in the width direction of the lid 13b is fixed to the opening end of the accommodating portion 13a, so that the opening end of the accommodating portion 13a is closed by the lid 13b.

  The first adapter 14 is connected to the first opening 131 of the case 13, and the second adapter 15 is connected to the second opening 132. As the first adapter 14 and the second adapter 15, for example, a heat shrinkable tube, a resin molded product, a metal processed product, or the like can be used.

  The first adapter 14 has a first connection port 141 on the side opposite to the side connected to the first opening 131. This 1st connection port 141 is connected to the high temperature side heat exchanger 30 via the piping 60b. The second adapter 15 also has a second connection port 151 on the side opposite to the side connected to the second opening 132. This 2nd connection port 151 is connected to the low temperature side heat exchanger 40 via the piping 60c.

  As shown in FIGS. 1 and 2, the magnetic change unit 20 includes a pair of permanent magnets 21. The pair of permanent magnets 21 is a position where the MCM heat exchanger 10 is not interposed between the pair of permanent magnets 21 (hereinafter also referred to as a first position) and a pair by a drive unit (not shown). And a position where the MCM heat exchanger 10 is interposed between the permanent magnets 21 (hereinafter also referred to as a second position). In the magnetic heat pump apparatus 1 shown in FIGS. 1 and 2, the pair of permanent magnets 21 reciprocate along the extending direction of the MCM heat exchanger 10. 21 may be reciprocated along the width direction of the MCM heat exchanger 10.

  The pair of permanent magnets 21 may be fixed and the MCM heat exchanger 10 may be reciprocated between the first position and the second position. Further, instead of the permanent magnet 21, an electromagnet having a coil may be used. In this case, a drive device for reciprocating the MCM heat exchanger 10 or the permanent magnet 21 becomes unnecessary. When an electromagnet having a coil is used, the strength of the magnetic field applied to the linear body 12 (magnitude of the magnetic field) may be changed by magnetizing / demagnetizing the electromagnet.

  The high temperature side heat exchanger 30 is a heat exchanger that has a higher temperature than the MCM heat exchanger 10. The high temperature side heat exchanger 30 has a function of exchanging high heat with the outside of the magnetic heat pump device 1 (for example, an object whose temperature is adjusted). On the other hand, the low temperature side heat exchanger 40 is a heat exchanger that is cooler than the MCM heat exchanger 10. The low temperature side heat exchanger 40 has a function of exchanging low heat with the outside of the magnetic heat pump device 1.

  The heat medium moving unit 50 includes a first piston cylinder 51 and a second piston cylinder 52. The first piston cylinder 51 is disposed at one end of the pipe 60a. The first piston cylinder 51 has a cylinder 511 and a piston 512 accommodated in the cylinder 511.

  The cylinder 511 is connected to the high temperature side heat exchanger 30 via the pipe 60a. The cylinder 511 includes a hollow cylindrical tubular portion 511a having a substantially circular cross-sectional shape, and a bottom portion 511b that closes one end in the longitudinal direction of the tubular portion 511a. The bottom 511b is provided with a connection port 511c that is connected to one end of the pipe 60a. The piston 512 is a plate-like member that is similar to the cross-sectional shape of the cylinder 511. The piston 512 is in close contact with the inner periphery of the cylindrical portion 511a without any gap.

  The piston 512 can reciprocally slide in the cylinder 511 along the longitudinal direction of the cylinder 511 by a reciprocating mechanism (not shown) that is not particularly illustrated. The reciprocating sliding of the piston 512 is performed in conjunction with the reciprocating movement between the first position and the second position of the permanent magnet 21. The reciprocating sliding of the piston 512 is performed in conjunction with the reciprocating sliding of a piston 522 (described later) of the second piston cylinder 52.

  In the first piston cylinder 51, the heat medium chamber 513 is defined by the cylindrical portion 511 a and the bottom portion 511 b of the cylinder 511 and the piston 512. The heat medium chamber 513 is filled with a heat medium.

  The second piston cylinder 52 is disposed at the other end of the pipe 60d. The second piston cylinder 52 also has a cylinder 521 and a piston 522 accommodated in the cylinder 521.

  The cylinder 521 is connected to the low temperature side heat exchanger 40 via a pipe 60d. The cylinder 521 has a shape similar to that of the cylinder 511, and includes a cylindrical portion 521a having a hollow cylindrical shape and a bottom portion 521b that closes one end of the cylindrical portion 521a in the longitudinal direction. The bottom 521b is provided with a connection port 521c that is connected to the other end of the pipe 60d. The piston 522 has the same shape as the piston 512, and is in close contact with the inner periphery of the tubular portion 521a without a gap.

  The piston 522 can reciprocally slide in the cylinder 511 along the longitudinal direction of the cylinder 511 by a reciprocating mechanism (not shown) that is not shown. The reciprocating sliding of the piston 522 is performed in conjunction with the reciprocating movement between the first position and the second position of the permanent magnet. The reciprocating sliding of the piston 522 is performed in conjunction with the reciprocating sliding of the piston 512.

  In the second piston cylinder 52, the heat medium chamber 523 is defined by the cylindrical portion 521 a and the bottom portion 521 b of the cylinder 521 and the piston 522. The heat medium chamber 523 is filled with a heat medium.

  The bypass pipe 70 is a bypass pipe for bypassing the MCM heat exchanger 10, and is one end side (first adapter 14 side) of the MCM heat exchanger 10 and the other end side (second second side) of the MCM heat exchanger 10. The adapter 15 side) is directly connected. Specifically, the bypass pipe 70 directly connects the pipe 60a and the pipe 60d. Thereby, in the magnetic heat pump apparatus 1, a flow path in which a part of the heat medium flows around the high temperature side heat exchanger 30, the MCM heat exchanger 10, and the low temperature side heat exchanger 40 is configured.

  The flow rate adjustment valve 80 is provided in the bypass pipe 70. The flow rate adjusting valve 80 adjusts the flow rate of the heat medium passing through the bypass pipe 70. Specifically, when the opening degree of the flow rate adjusting valve 80 is increased, the flow rate of the heat medium passing through the bypass pipe 70 is relatively increased. In this case, the flow rate of the heat medium passing through the MCM heat exchanger 10 connected in parallel with the bypass pipe 70 becomes relatively small. On the other hand, when the opening degree of the flow rate adjusting valve 80 is reduced, the flow rate of the heat medium passing through the bypass pipe 70 is relatively reduced. In this case, the flow rate of the heat medium passing through the MCM heat exchanger 10 connected in parallel with the bypass pipe 70 becomes relatively large. Such a flow rate adjusting valve 80 may be an electromagnetic valve or a manual valve.

  Next, the operation of the magnetic heat pump device 1 of the present embodiment will be described. FIG. 5 is a graph showing the relationship between the output W and the temperature span ΔT in the magnetic heat pump apparatus according to one embodiment of the present invention, and FIG. 6 shows the MCM heat exchanger in the magnetic heat pump apparatus according to one embodiment of the present invention. It is a graph which shows the change of the output W with respect to the flow volume of the heat medium to pass, the change of the temperature span (DELTA) T, and the change of energy efficiency COP.

  The magnetic heat pump apparatus 1 of this embodiment operates as follows. First, as shown in FIG. 1, when the permanent magnet 21 of the magnetic field changing unit 20 is moved to the first position, the strength of the magnetic field applied to the linear body 12 of the MCM heat exchanger 10 decreases, and the line The temperature of the body 12 decreases. Accordingly, in the heat medium moving part 50, the piston 512 in the cylinder 511 is slid and moved in the direction in which the volume of the heat medium chamber 513 decreases (that is, the bottom part 511b is moved along the longitudinal direction of the cylinder 511). The piston 512 in the cylinder 511 is slid and moved toward the closer side, and the piston 522 in the cylinder 521 is slid in the direction in which the volume of the heat medium chamber 523 increases (that is, the longitudinal direction of the cylinder 521). And the piston 522 in the cylinder 521 is slid and moved toward the side away from the bottom 521b. As a result, the pressure in the heat medium chamber 513 is increased and the pressure in the heat medium chamber 523 is decreased, and the heat medium is supplied from the heat medium chamber 513 to the pipe 60a via the connection port 511c, and one end of the MCM heat exchanger 10 is supplied. The heat medium moves in a direction from the side toward the other end side (hereinafter also referred to as a first direction).

  In this case, when the heat medium passes through the MCM heat exchanger 10, the heat medium is cooled by the linear body 12 whose temperature has decreased. And the cooled heat medium is supplied to the low temperature side heat exchanger 40, and the said low temperature side heat exchanger 40 is cooled. The heat medium is pushed out of the pipe 60d and supplied to the second piston cylinder 52 (specifically, the heat medium chamber 523) via the connection port 521c.

  By the above-described operation, the cooled low-temperature side heat exchanger 40 exchanges heat with the outside, so that the air conditioner using the magnetic heat pump device 1 can function as cooling.

  On the other hand, as shown in FIG. 2, when the permanent magnet 21 of the magnetic field changing unit 20 is moved to the second position, the strength of the magnetic field applied to the linear body 12 of the MCM heat exchanger 10 increases, The temperature of the body 12 rises. Accordingly, in the heat medium moving part 50, the piston 512 in the cylinder 511 is slid and moved in the direction in which the volume of the heat medium chamber 523 increases (that is, from the bottom part 511b along the longitudinal direction of the cylinder 511). The piston 512 in the cylinder 511 is slid and moved toward the away side.) The piston 522 in the cylinder 521 is slid and moved in the direction in which the volume of the heat medium chamber 523 decreases (that is, the longitudinal direction of the cylinder 521). The piston 522 in the cylinder 521 is slid and moved toward the side closer to the bottom 521b. As a result, the pressure in the heat medium chamber 513 is reduced and the pressure in the heat medium chamber 523 is increased, and the heat medium is supplied from the second piston cylinder 52 to the pipe 60d through the connection port 521c. The heat medium moves in a direction from the other end side to the one end side (hereinafter also referred to as a second direction).

  In this case, the heat medium is heated by the linear body 12 whose temperature has risen when passing through the MCM heat exchanger 10. And the heated heat medium is supplied to the high temperature side heat exchanger 30, and the said high temperature side heat exchanger 30 is heated. Then, the heat medium is discharged out of the pipe 60a and supplied to the first piston cylinder 51 (specifically, the heat medium chamber 513) through the connection port 511c.

  By the above-described operation, the heated high-temperature side heat exchanger 30 performs heat exchange with the outside, whereby the air conditioner using the magnetic heat pump device 1 can function as heating.

  Then, the permanent magnet 21 repeats reciprocation between the first position and the second position, and alternately increases / decreases the strength of the magnetic field applied to the linear body 12 in the MCM heat exchanger 10. Along with the increase / decrease in the strength of the magnetic field, the reciprocating sliding of the piston 512 in the cylinder 511 and the reciprocating operation of the piston 522 in the cylinder 521 are repeated to move the heat medium in the first direction. Then, by alternately repeating the movement of the heat medium in the second direction, the cooling of the low temperature side heat exchanger 40 and the heating of the high temperature side heat exchanger 30 are continued.

  Here, in the magnetic heat pump device 1, the output W of the magnetic heat pump device 1 is improved (decreased) due to the increase / decrease in the flow rate of the heat medium flowing through the MCM heat exchanger 10, but the temperature span ΔT is decreased (increased). There is a trade-off relationship (see FIG. 5). For this reason, according to the driving | running state (operation mode) of the magnetic heat pump apparatus 1, it is calculated | required to adjust the flow volume of the heat medium which flows through the MCM heat exchanger 10, and to operate the magnetic heat pump apparatus 1 efficiently.

  For example, when the operation state of the magnetic heat pump device 1 is the start-up mode, it is required to quickly adjust the temperature of the object to be temperature adjusted. In this case, as shown in FIG. 6, in the magnetic heat pump device 1, the flow rate of the heat medium passing through the MCM heat exchanger 10 is made relatively small (hereinafter referred to as the first flow rate) by reducing the opening degree of the flow rate adjustment valve 80. Also called flow rate.) Thereby, the output of the magnetic heat pump apparatus 1 can be increased.

  Moreover, when the operation state of the magnetic heat pump device 1 is a mode for obtaining a lower temperature / high temperature, it is required to exchange higher / lower heat for the object whose temperature is to be adjusted. In this case, as shown in FIG. 6, in the magnetic heat pump device 1, the flow rate of the heat medium passing through the MCM heat exchanger 10 is made smaller than the first flow rate (hereinafter, referred to as “the flow rate adjustment valve 80”). , Also referred to as the second flow rate). Thereby, the temperature span ΔT of the magnetic heat pump device 1 can be increased.

  Furthermore, when the operation of the magnetic heat pump device 1 is in the steady mode, it is required to operate with high energy efficiency while maintaining the temperature of the object to be temperature adjusted. In this case, as shown in FIG. 6, in the magnetic heat pump device 1, the opening degree of the flow rate adjustment valve 80 is adjusted, and the flow rate of the heat medium passing through the MCM heat exchanger 10 is changed to the first flow rate and the second flow rate. (Hereinafter also referred to as the third flow rate). Thereby, the energy efficiency COP of the magnetic heat pump apparatus 1 can be improved.

  Thus, in the present embodiment, the flow rate of the heat medium passing through the MCM heat exchanger 10 can be adjusted by the flow rate adjustment valve 80 provided in the bypass pipe 70 according to the operating state of the magnetic heat pump device 1. Therefore, the magnetic heat pump device 1 can be operated efficiently.

  The “magnetic heat pump device 1” in the present embodiment corresponds to an example of the “magnetic heat pump device” in the present invention, and the “MCM heat exchanger 10” in the present embodiment corresponds to an example of the “heat exchanger” in the present invention. The “linear body 12” in the present embodiment corresponds to an example of the “magnetic body” in the present invention, and the “case 13” in the present embodiment corresponds to an example of the “case” in the present invention. The “magnetic field changing unit 20” corresponds to an example of the “magnetic field changing unit” in the present invention, and the “high temperature side heat exchanger 30” in the present embodiment corresponds to an example of the “first external heat exchanger” in the present invention. The “low temperature side heat exchanger 40” in the present embodiment corresponds to an example of the “second external heat exchanger” in the present invention, and the “heat medium moving unit 50” in the present embodiment is the “heat” in the present invention. Medium The “bypass piping 70” in the present embodiment corresponds to an example of the “bypass passage” in the present invention, and the “flow rate adjusting valve 80” in the present embodiment corresponds to the “flow rate adjustment” in the present invention. The “first piston cylinder 51” and the “second piston cylinder 52” in the present embodiment correspond to an example of the “piston cylinder” in the present invention.

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

  For example, the flow rate of the heat medium passing through the bypass pipe 70 when the heat medium moves in the first direction is mutually different from the flow rate of the heat medium passing through the bypass pipe 70 when the heat medium moves in the second direction. The flow rate adjustment valve 80 may be operated so as to have different flow rates. For example, in the MCM heat exchanger 10, when the pressure loss generated when the heat medium moves in the first direction is different from the pressure loss generated when the heat medium moves in the second direction, the MCM is bidirectional. If the flow rate of the heat medium passing through the heat exchanger 10 is the same, the amount of heat exchanged between the MCM heat exchanger 10 and the heat medium may differ depending on the direction in which the heat medium moves. On the other hand, in the case of this example, the flow rate of the heat medium passing through the MCM heat exchanger 10 in both directions is adjusted to an optimal value by adjusting the opening degree of the flow rate adjusting valve 80 according to the flow direction of the heat medium. Can be set. Thereby, the magnetic heat pump apparatus 1 can be operated more efficiently.

  Further, when the flow rate adjusting valve 80 is an electromagnetic valve, the flow rate adjusting means may include a flow rate adjusting valve 80 and a control device (not shown) that controls the flow rate adjusting valve 80. This control device has a function of controlling the opening / closing operation of the flow rate adjusting valve 80 in conjunction with the operations of the magnetic field changing unit 20 and the heat medium moving unit 50. For example, the control device passes through the bypass flow path when the heat medium moves in the second direction and the flow rate of the heat medium through the bypass flow path when the heat medium moves in the first direction. The opening / closing operation of the flow rate adjusting valve 80 may be controlled so that the flow rate of the heat medium differs from each other.

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

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

  Further, in the MCM heat exchanger, a plurality of aggregates employing MCM materials having different Curie points (Curie temperatures) may be used according to the temperature gradient from the high temperature end side to the low temperature end side. Specifically, a material having a relatively high Curie point is used for the assembly disposed on the high temperature end side, and a material having a relatively low Curie point is employed for the assembly disposed on the low temperature end side. It is preferable. As described above, the magnetocaloric effect can be applied more efficiently by using the wire made of the material having different Curie points corresponding to the temperature atmosphere in the MCM heat exchanger.

DESCRIPTION OF SYMBOLS 1 ... Magnetic heat pump apparatus 10 ... MCM heat exchanger 11 ... Aggregate 12 ... Linear body 13 ... Case 131 ... 1st opening 132 ... 2nd opening 13a ... Accommodating part 13b ... Cover part 14 ... 1st adapter 141 ... 1st connection port 15 ... 2nd adapter 151 ... 2nd connection port 20 ... Magnetic field change part 21 ... Permanent magnet 30 ... High temperature side heat exchanger 40 ... Low temperature side heat exchanger 50 ... Heat-medium moving part 51 ... 1st piston cylinder 513 ... Heat medium chamber 511 ... Cylinder 511a ... Cylindrical part 511b ... Bottom part 511c ... Connection port 512 ... Piston 52 ... Second piston cylinder 523 ... Heat medium chamber 521 ... Cylinder 521a ... Cylindrical part 521b ... Bottom 521c ... Connection port 522 ... Pistons 60a-60d ... Piping 70 ... Bypass piping 80 ... Flow control valve

Claims (3)

A heat exchanger including a magnetic body that exhibits a magnetocaloric effect, and a case in which the magnetic body is housed;
Magnetic field changing means for applying a magnetic field to the magnetic body and changing the strength of the magnetic field;
A first external heat exchanger connected to one end of the heat exchanger;
A second external heat exchanger connected to the other end of the heat exchanger;
Along with changing the strength of the magnetic field applied to the magnetic body by the magnetic field changing means, the heat medium is moved from the one end side to the other end side or from the other end side to the one end side. A heat transfer means;
A bypass flow path for directly connecting the one end side and the other end side to bypass the heat exchanger;
A magnetic heat pump apparatus comprising: a flow rate adjusting unit that is provided in the bypass flow channel and adjusts a flow rate of the heat medium passing through the bypass flow channel. The magnetic heat pump device according to claim 1,
When the heat medium moves from the one end side toward the other end side, the flow rate of the heat medium passing through the bypass channel, and when the heat medium moves from the other end side toward the one end side A magnetic heat pump device in which the flow rate adjusting means operates such that the flow rate of the heat medium passing through the bypass flow path in the flow path is different from each other. The magnetic heat pump device according to claim 1 or 2,
The heat medium moving means is a magnetic heat pump device having at least one piston cylinder.

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