Magnetic refrigeration device and refrigeration device

Abstract

The magnetic field applying portion (20) is relatively moved in a first direction with respect to the magnetic working substance (11). The magnetic pole (24) of the magnetic field applying portion (20) is disposed on one end side in a second direction orthogonal to the first direction of the magnetic working substance (11). Further, the magnetic poles (24) of the magnetic field applying portion (20) are provided at intervals in a third direction orthogonal to the first and second directions of the magnetic working substance (11).

Description

Technical Field

[0001] This disclosure relates to a magnetic refrigeration device and a refrigeration device. Background Technology

[0002] Patent document 1 discloses a magnetic heat pump device in which multiple material containers are arranged circumferentially along a rotation axis in a manner that surrounds the outer periphery of a built-in magnetic yoke. By rotating the built-in magnetic yoke circumferentially, a magnetic field is applied to the magnetic working substance (magnetic material) housed in the material containers.

[0003] Patent Document 1: International Publication No. 2019 / 150819 Summary of the Invention

[0004] -The technical problem the invention aims to solve-

[0005] However, in the invention of Patent Document 1, there is space between adjacent material containers that does not contain the magnetic working fluid. In the invention of Patent Document 1, since the magnetic flux flows circumferentially inside the material container, the rotation direction of the built-in magnetic yoke is consistent with the direction of magnetic flux flow inside the material container.

[0006] Therefore, the path of the magnetic flux flowing circumferentially inside the material container includes the space between adjacent material containers, which may lead to an increase in magnetic reluctance.

[0007] The purpose of this disclosure is to suppress the increase of magnetic reluctance by improving the direction of the magnetic flux flowing through the magnetic working medium.

[0008] - Technical solutions for solving technical problems -

[0009] The first aspect of this disclosure relates to a magnetic cooling device, the magnetic cooling device including a magnetic working medium 11 and a magnetic field applying part 20, the magnetic field applying part 20 being movable relative to the magnetic working medium 11 along a first direction, and the magnetic field applying part 20 applying a magnetic field to the magnetic working medium 11, the magnetic poles 24 of the magnetic field applying part 20 being arranged at one end of the magnetic working medium 11 in a second direction orthogonal to the first direction, and being spaced apart in a third direction orthogonal to both the first direction and the second direction of the magnetic working medium 11.

[0010] In the first aspect, the magnetic field applying part 20 moves relative to the magnetic working material 11 along a first direction. The magnetic poles 24 of the magnetic field applying part 20 are arranged at one end of the magnetic working material 11 in a second direction orthogonal to the first direction. Furthermore, the magnetic poles 24 of the magnetic field applying part 20 are spaced apart in a third direction orthogonal to the first and second directions of the magnetic working material 11.

[0011] In this way, the magnetic field applying part 20 moves relative to the first direction, and the magnetic flux flows in the magnetic working medium 11 along the third direction. By making the first direction orthogonal to the third direction, the increase in magnetic resistance can be suppressed.

[0012] The second aspect of this disclosure is based on the magnetic cooling device of the first aspect, wherein the relative movement is a relative rotational movement about a predetermined axis, the first direction is circumferential, the second direction is radial, the third direction is axial, the magnetic working medium 11 and the magnetic poles 24 of the magnetic field applying part 20 are arranged radially spaced apart, and the magnetic poles 24 of the magnetic field applying part 20 are arranged axially spaced apart.

[0013] In the second aspect, it is possible to make the magnetic flux flow along the axial direction of the magnetic working material 11.

[0014] The third aspect of this disclosure is based on the magnetic cooling device of the first aspect, wherein the relative movement is a relative rotational movement about a predetermined axis, the first direction is circumferential, the second direction is axial, the third direction is radial, the magnetic working medium 11 and the magnetic poles 24 of the magnetic field applying part 20 are spaced apart axially, and the magnetic poles 24 of the magnetic field applying part 20 are spaced apart radially.

[0015] In the third aspect, it is possible to make the magnetic flux flow radially along the magnetic working material 11.

[0016] The fourth aspect of this disclosure is based on the magnetic cooling device of the first aspect, wherein the relative movement is a relative linear movement that moves linearly along the first direction, the magnetic working medium 11 and the magnetic pole 24 of the magnetic field applying part 20 are spaced apart in the second direction, and the magnetic pole 24 of the magnetic field applying part 20 is spaced apart in the third direction.

[0017] In the fourth aspect, a magnetic refrigeration device is provided that allows the magnetic field application unit 20 to move linearly relative to the magnetic working medium 11.

[0018] The fifth aspect of this disclosure, based on the magnetic refrigeration device of any one of the first to fourth aspects, provides magnetic yokes 13 with higher permeability than the magnetic working medium 11 at both ends of the magnetic working medium 11 located in the third direction.

[0019] In the fifth aspect, by causing the magnetic flux to flow through the magnetic yoke 13 at both ends of the magnetic working medium 11 in a third direction, a magnetic field can be uniformly applied to the magnetic working medium 11.

[0020] Based on the magnetic refrigeration device of any one of the first to fifth aspects of this disclosure, the sixth aspect of the magnetic field application part 20 has a longer length in the first direction of the surface of the magnetic pole 24 opposite to the magnetic working material 11 than the length in the first direction of the surface of the magnetic working material 11 opposite to the magnetic pole 24 of the magnetic field application part 20.

[0021] In the sixth aspect, the alignment accuracy between the magnetic working medium 11 and the magnetic pole 24 of the magnetic field application part 20 can be reduced without increasing the magnetic resistance.

[0022] The seventh aspect of this disclosure relates to a refrigeration apparatus, the refrigeration apparatus comprising a magnetic refrigeration device 10 according to any one of the first to sixth aspects, and a heat medium circuit 2 that exchanges heat with the magnetic refrigeration device 10.

[0023] In the seventh aspect, a refrigeration device including a magnetic refrigeration device 10 can be provided. Attached Figure Description

[0024] Figure 1 This is a piping system diagram of the refrigeration device according to the first embodiment;

[0025] Figure 2 This is a top view showing the structure of the magnetic refrigeration device;

[0026] Figure 3 It is along Figure 2 The cross-sectional view seen by the A-A arrow;

[0027] Figure 4 This is a side sectional view showing a variation of the first embodiment, Example 1;

[0028] Figure 5 This is a top view showing a variation of the first embodiment, Example 2;

[0029] Figure 6 It is along Figure 5 The sectional view seen by the B-B arrow;

[0030] Figure 7 This is a side sectional view showing a variation of the first embodiment, Example 3;

[0031] Figure 8 This is a side sectional view showing a variation of the first embodiment, example 4;

[0032] Figure 9 This is a side sectional view showing a variation 5 of the first embodiment;

[0033] Figure 10 This is a side sectional view showing a variation of the first embodiment, example 6;

[0034] Figure 11This is a side sectional view showing a variation 7 of the first embodiment;

[0035] Figure 12 This is a side sectional view showing a variation of the first embodiment, example 8;

[0036] Figure 13 This is a top view showing the structure of the magnetic refrigeration device according to the second embodiment;

[0037] Figure 14 This is a top view showing the structure of the magnetic field application section;

[0038] Figure 15 It is along Figure 13 The cross-sectional view seen by the C-C arrow;

[0039] Figure 16 This is a side sectional view showing a modified example 1 of the second embodiment;

[0040] Figure 17 This is a side sectional view showing a modified example 2 of the second embodiment;

[0041] Figure 18 This is a side sectional view showing a variation of the second embodiment, Example 3;

[0042] Figure 19 This is a side sectional view showing a variation of the second embodiment, example 4;

[0043] Figure 20 This is a side sectional view showing a variation 5 of the second embodiment;

[0044] Figure 21 This is a side sectional view showing a variation of the second embodiment, example 6;

[0045] Figure 22 This is a top view showing the structure of the magnetic refrigeration device according to the third embodiment;

[0046] Figure 23 This is a side sectional view showing the structure of the magnetic refrigeration device;

[0047] Figure 24 It is a top view showing the state after the magnetic field application part has been moved in a straight line relative to the magnetic working medium;

[0048] Figure 25 This is a side sectional view showing a variation of the third embodiment, Example 1;

[0049] Figure 26 This is a side sectional view showing a variation of the third embodiment, Example 2;

[0050] Figure 27 This is a side sectional view showing a variation of the third embodiment, Example 3;

[0051] Figure 28 This is a side sectional view showing a variation of the third embodiment, Example 4;

[0052] Figure 29 This is a top view showing the structure of the magnetic refrigeration device according to the fourth embodiment;

[0053] Figure 30 This is a side sectional view showing a variation of the fourth embodiment, Example 1;

[0054] Figure 31 This is a top view showing the structure of the magnetic refrigeration device according to the fifth embodiment;

[0055] Figure 32 This is a top view showing the structure of the magnetic field application section;

[0056] Figure 33 This is a side sectional view showing the structure of the magnetic cooling device according to the sixth embodiment;

[0057] Figure 34 This is a top view showing a modified example of the sixth embodiment;

[0058] Figure 35 It is along Figure 34 The cross-sectional view seen by the D-D arrow. Detailed Implementation

[0059] First Implementation Method

[0060] The first embodiment will now be described.

[0061] like Figure 1 As shown, the refrigeration device 1 includes a heat medium circuit 2. The refrigeration device 1 is used, for example, in an air conditioning system. The heat medium circuit 2 is filled with a heat medium. The heat medium may include, for example, refrigerant, water, brine, etc.

[0062] The refrigeration device 1 includes a low-temperature heat exchanger 3, a high-temperature heat exchanger 4, a pump 5, and a magnetic refrigeration device 10. The magnetic refrigeration device 10 uses the magnetocaloric effect to regulate the temperature of the heat medium.

[0063] The heat medium circuit 2 is formed as a closed loop. In the heat medium circuit 2, a pump 5, a low-temperature heat exchanger 3, a magnetic refrigeration device 10, and a high-temperature heat exchanger 4 are connected in sequence.

[0064] The heat transfer medium circuit 2 includes a low-temperature side flow path 2a and a high-temperature side flow path 2b. The low-temperature side flow path 2a connects the temperature-regulating flow path 10a of the magnetic refrigeration device 10 to the first valve port 6a of the pump 5. The high-temperature side flow path 2b connects the temperature-regulating flow path 10a of the magnetic refrigeration device 10 to the second valve port 6b of the pump 5.

[0065] <Low-temperature side heat exchanger and high-temperature side heat exchanger>

[0066] The low-temperature side heat exchanger 3 allows the heat medium cooled by the magnetic refrigeration device 10 to exchange heat with a specified cooling object (e.g., secondary refrigerant and air). The high-temperature side heat exchanger 4 allows the heat medium heated by the magnetic refrigeration device 10 to exchange heat with a specified heating object (e.g., secondary refrigerant and air).

[0067] <pump>

[0068] Pump 5 repeatedly alternates between the first and second actions. In the first action, the hot medium in the hot medium circuit 2 is pumped along... Figure 1 The medium is conveyed in the left direction. In the second action, the hot medium in the hot medium circuit 2 is conveyed along... Figure 1 The pump 5 is a conveying mechanism that causes the hot medium in the hot medium circuit 2 to flow back and forth.

[0069] Pump 5 is a reciprocating piston pump. Pump 5 includes a pump housing 6 and a piston 7.

[0070] The piston 7 is arranged to move forward and backward within the pump housing 6. The piston 7 divides the interior of the pump housing 6 into a first chamber S1 and a second chamber S2. A first valve port 6a and a second valve port 6b are formed on the pump housing 6. The first valve port 6a communicates with the first chamber S1 and is connected to the low-temperature side flow path 2a. The second valve port 6b communicates with the second chamber S2 and is connected to the high-temperature side flow path 2b. The piston 7 is driven by a drive mechanism (not shown).

[0071] In the first action, piston 7 moves toward the first valve port 6a. During this first action, the volume of the first chamber S1 decreases and the volume of the second chamber S2 increases. As a result, the hot medium in the first chamber S1 is ejected through the first valve port 6a into the low-temperature side flow path 2a. Simultaneously, the hot medium in the high-temperature side flow path 2b is drawn into the second chamber S2 through the second valve port 6b.

[0072] In the second action, piston 7 moves towards the second valve port 6b. During this second action, the volume of the second chamber S2 decreases while the volume of the first chamber S1 increases. As a result, the hot medium in the second chamber S2 is ejected through the second valve port 6b into the high-temperature side flow path 2b. Simultaneously, the hot medium in the low-temperature side flow path 2a is drawn into the first chamber S1 through the first valve port 6a.

[0073] Control Department

[0074] The refrigeration unit 1 includes a control unit 8. The control unit 8 controls the operation of the pump 5 and the magnetic refrigeration unit 10 according to prescribed operating instructions. The control unit 8 is configured using a microcomputer and a storage device (specifically a semiconductor memory) for storing the software that enables the microcomputer to operate.

[0075] <Magnetic Refrigeration Device>

[0076] like Figure 2 and Figure 3 As shown, the magnetic refrigeration device 10 includes a magnetic working medium 11, a magnetic field application part 20, and a rotation mechanism 15.

[0077] The magnetic working material 11 is housed in a material container (illustration omitted). The material container is formed of a non-magnetic metal material or resin material.

[0078] When a magnetic field is applied to the magnetic working medium 11, the magnetic working medium 11 heats up. When the magnetic field is removed from the magnetic working medium 11, the magnetic working medium 11 absorbs heat. It should be noted that the magnetic working medium 11 will also heat up when the applied magnetic field is strengthened, and it will also absorb heat when the applied magnetic field is weakened.

[0079] The material of magnetic working medium 11 can be, for example, Gd5 (Ge 0.5 Si 0.5 4. La(Fe 1-x Si x ) 13 ,La(Fe 1-x Co x Si y ) 13 ,La(Fe 1-x Si x ) 13 Hy、Mn(As 0.9 Sb 0.1 )wait.

[0080] Multiple magnetic working materials 11 are arranged at intervals in the circumferential direction. Figure 2 In the example shown, eight magnetic working materials 11 extending in an arc along the circumference are arranged at equal intervals along the circumference.

[0081] A magnetic yoke 13 with a higher permeability than the magnetic working material 11 is disposed on the magnetic working material 11. The magnetic yoke 13 is disposed at both axial ends of the magnetic working material 11 (see reference). Figure 3 ).

[0082] The rotating mechanism 15 has a rotating shaft 16 and a motor 17. The rotating shaft 16 is connected to the motor 17. The motor 17 rotates the rotating shaft 16. A magnetic field application part 20 is connected to the rotating shaft 16.

[0083] The magnetic field applying part 20 moves relative to the magnetic working material 11 along a first direction. Specifically, the magnetic field applying part 20 rotates around the axis along with the rotating shaft 16 as the motor 17 rotates. Thus, the magnetic field applying part 20 rotates relative to the magnetic working material 11. That is to say, the first direction is circumferential.

[0084] A magnetic field applying part 20 is arranged radially inside a plurality of magnetic working materials 11. The magnetic field applying part 20 applies a magnetic field to the magnetic working materials 11. The magnetic field applying part 20 has an iron core 21 and magnetic poles 24.

[0085] The iron core 21 is formed of magnetic material. A rotating shaft 16 is connected to the center of the iron core 21. The iron core 21 has multiple protrusions 23.

[0086] Multiple protrusions 23 extend radially outward from the center of the iron core 21. The multiple protrusions 23 are spaced apart circumferentially. Figure 2 In the example shown, four protrusions 23 are arranged at equal intervals in the circumferential direction. The protrusions 23 are arranged to be radially separated from the magnetic working material 11.

[0087] The magnetic poles 24 of the magnetic field applying part 20 are arranged only at one end of the magnetic working material 11 in a second direction orthogonal to the first direction. The magnetic working material 11 and the magnetic poles 24 of the magnetic field applying part 20 are radially spaced apart.

[0088] Specifically, a first magnet 25 and a second magnet 26 are arranged between the magnetic working material 11 and the protrusion 23 of the iron core 21. The first magnet 25 and the second magnet 26 constitute the magnetic poles 24 of the magnetic field application part 20.

[0089] Magnetic poles 24 are spaced apart on a third direction orthogonal to the first and second directions of the magnetic working material 11. Figure 3 In the example shown, the first direction is circumferential, the second direction is radial, and the third direction is axial.

[0090] The first magnet 25 and the second magnet 26 constituting the magnetic pole 24 are spaced apart axially. The first magnet 25 and the second magnet 26 apply a magnetic field to the magnetic working material 11 so that the magnetic flux flows along the axial direction of the magnetic working material 11.

[0091] The first magnet 25 is arranged such that the magnetic working material 11 is on one side ( Figure 3 The radial outer side of the core 21 is the N pole, and the protrusion 23 side of the core 21 is the N pole. Figure 3 The inner radial side of the magnet is the S pole. The second magnet 26 is arranged such that the magnetic working material 11 side ( Figure 3 The radial inner side of the core 21 is the S pole, and the protrusion 23 side of the core 21 is the S pole. Figure 3The outermost radial part is the N pole. It should be noted that the positional relationship between the N pole and the S pole in the first magnet 25 and the second magnet 26 can also be reversed.

[0092] The first magnet 25 and the second magnet 26, together with the iron core 21, rotate relative to the magnetic working material 11 in the circumferential direction. When the first magnet 25 and the second magnet 26 are positioned opposite the magnetic working material 11, the magnetic flux flows along the axial direction of the magnetic working material 11. It should be noted that the direction of magnetic flux flow is indicated by dashed arrows.

[0093] The first magnet 25 and the second magnet 26 are arranged opposite to the magnetic working material 11. Specifically, when viewing the magnetic working material 11 through which the magnetic flux flows radially, the first magnet 25 and the second magnet 26 are arranged along the two ends of the magnetic working material 11 located in the axial direction, respectively. The magnetic field applying part 20 applies a magnetic field to the magnetic working material 11.

[0094] In the magnetic cooling device 10, magnetic flux flows from the first magnet 25 toward... Figure 3 The magnetic flux flows along the upper yoke 13. Magnetic flux flows axially within the magnetic working material 11 from the upper yoke 13 to the lower yoke 13. Magnetic flux flows from the lower yoke 13 toward the second magnet 26. Magnetic flux flows axially along the protrusion 23 of the iron core 21 from the second magnet 26 to the first magnet 25. As a result, the magnetic working material 11, to which the magnetic field is applied, heats up.

[0095] Then, the magnetic field applying part 20 is rotated, so that the first magnet 25 and the second magnet 26 are opposite to the adjacent magnetic working material 11. As a result, the magnetic working material 11, which was initially subjected to a magnetic field, is demagnetized and absorbs heat. On the other hand, the adjacent magnetic working material 11 is subjected to a magnetic field and generates heat.

[0096] - Operation of the refrigeration unit -

[0097] use Figure 1 The basic operation of the refrigeration unit 1 will be explained. The refrigeration unit 1 repeatedly alternates between heating and cooling actions. The cycle between switching between heating and cooling actions is set to approximately 0.1 to 1 second, for example.

[0098] <Heating action>

[0099] During the heating operation, pump 5 performs a first operation, and magnetic field applying unit 20 performs a first magnetic field applying operation. That is, during the heating operation, the heating medium is ejected from the first valve port 6a of pump 5. At the same time, a magnetic field is applied to the magnetic working medium 11.

[0100] After the hot medium is ejected from the first chamber S1 of pump 5 into the low-temperature side flow path 2a, the hot medium in the low-temperature side flow path 2a flows into the temperature-regulating flow path 10a of the magnetic refrigeration device 10. In the refrigeration device 1 during the first magnetic field application process, heat is released from the magnetic working medium 11 to its surroundings. Therefore, the hot medium flowing through the temperature-regulating flow path 10a is heated by the magnetic working medium 11. The hot medium, heated in the temperature-regulating flow path 10a, flows into the high-temperature side flow path 2b and passes through the high-temperature side heat exchanger 4. In the high-temperature side heat exchanger 4, the specified heating object (e.g., secondary refrigerant or air) is heated by the high-temperature hot medium. The hot medium in the high-temperature side flow path 2b is drawn into the second chamber S2 from the second valve port 6b of pump 5.

[0101] <Cooling Action>

[0102] During the cooling operation, pump 5 performs a second operation, and magnetic field application unit 20 performs a second magnetic field application operation. That is, during the heating operation, the hot medium is ejected from the second valve port 6b of pump 5, and at the same time, the magnetic field of the magnetic working medium 11 is removed.

[0103] After the hot medium is ejected from the second chamber S2 of pump 5 into the high-temperature side flow path 2b, the hot medium in the high-temperature side flow path 2b flows into the temperature-regulating flow path 10a of the magnetic refrigeration device 10. In the refrigeration device 1 during the second magnetic field application process, the magnetic working fluid 11 absorbs heat from its surroundings. Therefore, the hot medium flowing through the temperature-regulating flow path 10a is cooled by the magnetic working fluid 11. The hot medium cooled in the temperature-regulating flow path 10a flows to the low-temperature side flow path 2a and then through the low-temperature side heat exchanger 3. In the low-temperature side heat exchanger 3, the specified cooling object (e.g., secondary refrigerant or air) is cooled by the low-temperature hot medium. The hot medium in the low-temperature side flow path 2a is drawn into the first chamber S1 from the first valve port 6a of pump 5.

[0104] -Effects of the first implementation method-

[0105] According to the features of this embodiment, the magnetic field applying part 20 moves relative to the magnetic working material 11 along a first direction. The magnetic poles 24 of the magnetic field applying part 20 are arranged only at one end of the magnetic working material 11 in a second direction orthogonal to the first direction. Furthermore, the magnetic poles 24 of the magnetic field applying part 20 are spaced apart in a third direction orthogonal to the first and second directions of the magnetic working material 11.

[0106] In this way, the magnetic field applying part 20 moves relative to the first direction, and the magnetic flux flows in the magnetic working medium 11 along the third direction. By making the first direction orthogonal to the third direction, the increase in magnetic resistance can be suppressed.

[0107] Furthermore, if the magnetic poles 24 of the magnetic field application unit 20 are arranged only on one end in the second direction, the magnetic circuit length is shortened, thus the overall device can be made more compact and the magnetic flux density can be increased.

[0108] According to the features of this embodiment, the relative movement is a relative rotational movement about a predetermined axis. The first direction is circumferential, the second direction is radial, and the third direction is axial. The magnetic working material 11 and the magnetic poles 24 of the magnetic field applying part 20 are spaced apart radially. The magnetic poles 24 of the magnetic field applying part 20 are spaced apart axially.

[0109] This allows the magnetic flux to flow along the axial direction of the magnetic working material 11.

[0110] According to the features of this embodiment, magnetic yokes 13 with higher permeability than magnetic working material 11 are provided at both ends of the magnetic working material 11 in the third direction.

[0111] Specifically, the relative permeability of iron or silicon steel, the general material of the magnetic yoke 13, is about 4000 to 5000. On the other hand, the relative permeability of the magnetic working material 11 is about 1.5 to 3.0.

[0112] In this way, by allowing the magnetic flux to flow through the magnetic yoke 13 at both ends of the magnetic working material 11 in a third direction, a magnetic field can be uniformly applied to the magnetic working material 11.

[0113] Furthermore, the magnetic yokes 13, located at both ends in the third direction, are arranged along the first direction of the magnetic working material 11. Therefore, when the magnetic working material 11 and the magnetic field application part 20 move relative to each other in the first direction, the change in the magnetic attraction force between the magnetic yoke 13 and the magnetic field application part 20 (the so-called cogging torque) is very small. As a result, the torque required for relative movement can be reduced, thereby enabling the motor 17 to be miniaturized and power consumption reduced.

[0114] According to the features of this embodiment, it includes a magnetic refrigeration device 10 and a heat medium circuit 2 that exchanges heat with the magnetic refrigeration device 10.

[0115] Therefore, it is possible to provide a refrigeration device 1 that includes a magnetic refrigeration device 10.

[0116] -Modification 1 of the first embodiment-

[0117] In the first embodiment, the magnetic pole 24 of the magnetic field application part 20 may also be formed by the first protrusion 31a of the first iron core 31 and the second protrusion 32a of the second iron core 32.

[0118] like Figure 4As shown, the iron core 30 has a first iron core 31, a second iron core 32, and a permanent magnet 34. The first iron core 31 and the second iron core 32 are composed of plate-like components. The first iron core 31 and the second iron core 32 are spaced apart axially. The permanent magnet 34 is sandwiched between the first iron core 31 and the second iron core 32. The permanent magnet 34 is, for example, formed in a ring shape.

[0119] exist Figure 4 In the example shown, the permanent magnet 34 is arranged such that: on the side of the first iron core 31 ( Figure 4 The upper side of the middle core is the N pole, and the second iron core 32 side ( Figure 4 The lower part of the magnet is the S pole. It should be noted that the N pole and S pole of the permanent magnet 34 can also be reversed.

[0120] Multiple first protrusions 31a are spaced apart circumferentially on the first iron core 31. Multiple second protrusions 32a are spaced apart circumferentially on the second iron core 32. The first iron core 31 and the second iron core 32 are identical in shape and formed in the same position when viewed axially. The first protrusions 31a and the second protrusions 32a constitute the magnetic poles 24 of the magnetic field applying part 20.

[0121] When the first protrusion 31a and the second protrusion 32a are positioned opposite the magnetic working material 11, the magnetic flux flows along the axial direction of the magnetic working material 11. It should be noted that the direction of magnetic flux flow is indicated by dashed arrows.

[0122] When the magnetic flux flowing through the magnetic working medium 11 is viewed radially, the first protrusion 31a and the second protrusion 32a are respectively arranged at the two ends of the magnetic working medium 11 along the axial direction. The magnetic field applying part 20 applies a magnetic field to the magnetic working medium 11.

[0123] Specifically, in the magnetic cooling device 10, magnetic flux flows from the permanent magnet 34 toward the first protrusion 31a of the first iron core 31. Magnetic flux flows from the first protrusion 31a toward... Figure 4 The magnetic flux flows along the upper yoke 13. Magnetic flux flows axially within the magnetic working material 11 from the upper yoke 13 to the lower yoke 13. Magnetic flux flows from the lower yoke 13 toward the second protrusion 32a of the second iron core 32. Magnetic flux flows from the second protrusion 32a toward the permanent magnet 34. As a result, the magnetic working material 11, to which the magnetic field is applied, heats up.

[0124] Then, the magnetic field applying part 20 is rotated so that the first protrusion 31a and the second protrusion 32a are opposite to the adjacent magnetic working material 11. As a result, the magnetic working material 11, which was initially subjected to a magnetic field, is demagnetized and absorbs heat. On the other hand, the adjacent magnetic working material 11 is subjected to a magnetic field and generates heat.

[0125] -Modification 2 of the first embodiment-

[0126] In the first embodiment, the magnetic poles 24 of the magnetic field application part 20 may also be arranged on the radial outer side of the magnetic working material 11.

[0127] like Figure 5 and Figure 6 As shown, the magnetic field applying part 20 is arranged radially outward of a plurality of magnetic working materials 11. The magnetic field applying part 20 has an iron core 21 and magnetic poles 24. The iron core 21 has a plurality of protrusions 23. The plurality of protrusions 23 protrude radially outward from the center of the iron core 21. The protrusions 23 pass through... Figure 6 The magnetic working material 11 extends from the radial inner side to the radial outer side below the magnetic working material 11.

[0128] An upright mounting portion 50 is provided at the top end of the protrusion 23. The upright mounting portion 50 is erected along the outer peripheral surface of the magnetic working material 11 and positioned opposite to the magnetic working material 11. The upright mounting portion 50 is arranged to be radially separated from the magnetic working material 11.

[0129] A first magnet 25 and a second magnet 26 are arranged between the vertically mounted portion 50 of the magnetic working material 11 and the iron core 21. The first magnet 25 and the second magnet 26 constitute the magnetic poles 24 of the magnetic field applying portion 20. The magnetic working material 11 and the magnetic poles 24 of the magnetic field applying portion 20 are spaced apart radially. The first magnet 25 and the second magnet 26 are spaced apart axially. When the first magnet 25 and the second magnet 26 are positioned opposite the magnetic working material 11, the magnetic flux flows along the axial direction of the magnetic working material 11. The direction of magnetic flux flow is indicated by dashed arrows.

[0130] - Modification 3 of the first embodiment -

[0131] In a variation 2 of the first embodiment, the magnetic poles 24 of the magnetic field application part 20 may also be formed by the first protrusion 31a of the first iron core 31 and the second protrusion 32a of the second iron core 32.

[0132] like Figure 7 As shown, the iron core 30 has a first iron core 31, a second iron core 32, and a permanent magnet 34.

[0133] The first iron core 31 is composed of a plate-shaped component. A plurality of first protrusions 31a are provided on the first iron core 31. The first protrusions 31a are arranged to be radially separated from the magnetic working material 11.

[0134] The second iron core 32 has multiple protrusions 23 and an upright mounting portion 50. The protrusions 23 are... Figure 7The protrusion 23 extends radially from the inner side to the outer side of the magnetic working material 11 below it. An upright mounting portion 50 is provided at the top of the protrusion 23. The upright mounting portion 50 is vertically mounted along the outer peripheral surface of the magnetic working material 11 to a position opposite to the lower end of the magnetic working material 11. The upright mounting portion 50 is arranged to be radially separated from the magnetic working material 11.

[0135] A second protrusion 32a is provided on the vertical mounting portion 50. The second protrusion 32a protrudes radially inward from the top end of the vertical mounting portion 50. The second protrusion 32a is arranged to be radially separated from the magnetic working material 11.

[0136] The first iron core 31 and the second iron core 32 are spaced apart axially. A permanent magnet 34 is sandwiched between the first iron core 31 and the second iron core 32. The first protrusion 31a and the second protrusion 32a constitute the magnetic poles 24 of the magnetic field application section 20. When the first protrusion 31a and the second protrusion 32a are positioned opposite the magnetic working material 11, magnetic flux flows axially along the magnetic working material 11. The direction of magnetic flux flow is indicated by dashed arrows.

[0137] - Variation 4 of the first embodiment -

[0138] In the first embodiment described above, the magnetic pole 24 of the magnetic field application part 20 may also be formed by the first magnet 25 and the magnetic pole protrusion 51.

[0139] like Figure 8 As shown, the magnetic field applying part 20 is arranged radially inside the plurality of magnetic working materials 11. The magnetic field applying part 20 has an iron core 21 and magnetic poles 24. The iron core 21 has a plurality of protrusions 23. The plurality of protrusions 23 protrude radially outward from the center of the iron core 21. The protrusions 23 are arranged to be radially separated from the magnetic working materials 11.

[0140] A first magnet 25 and a pole protrusion 51 are arranged between the magnetic working material 11 and the protrusion 23 of the iron core 21. The pole protrusion 51 protrudes radially outward from the lower end of the protrusion 23 of the iron core 21. The first magnet 25 and the pole protrusion 51 constitute the magnetic pole 24 of the magnetic field application part 20. The first magnet 25 and the pole protrusion 51 are spaced apart axially. When the first magnet 25 and the pole protrusion 51 are positioned opposite the magnetic working material 11, magnetic flux flows axially along the magnetic working material 11. The direction of magnetic flux flow is indicated by a dashed arrow.

[0141] - Variation 5 of the first embodiment -

[0142] In the first embodiment described above, the magnetic poles 24 of the magnetic field application part 20 may also be arranged on the radial inner side (one end side in the second direction) and the axial side (third direction) of the magnetic working material 11.

[0143] like Figure 9 As shown, the magnetic field applying part 20 is arranged radially inside the plurality of magnetic working materials 11. The magnetic field applying part 20 has an iron core 21 and magnetic poles 24. The iron core 21 has a plurality of protrusions 23. The plurality of protrusions 23 protrude radially outward from the center of the iron core 21. The protrusions 23 are arranged to be radially separated from the magnetic working materials 11.

[0144] A first magnet 25 is arranged between the protrusion 23 of the magnetic working material 11 and the iron core 21. A magnetic pole protrusion 51 is provided on the protrusion 23. The magnetic pole protrusion 51 protrudes radially outward from the lower end of the protrusion 23. The magnetic pole protrusion 51 extends to a position opposite to the lower surface of the magnetic working material 11. In other words, the magnetic pole protrusion 51 extends to a position opposite to the axial direction of the magnetic working material 11. The first magnet 25 and the magnetic pole protrusion 51 constitute the magnetic pole 24 of the magnetic field applying part 20.

[0145] The first magnet 25 and the magnetic pole protrusion 51 are spaced apart axially. When the first magnet 25 and the magnetic pole protrusion 51 are positioned opposite the magnetic working material 11, the magnetic flux flows axially along the magnetic working material 11. The direction of the magnetic flux flow is indicated by a dashed arrow.

[0146] The magnetic poles 24 of the magnetic field applying part 20 are arranged on one end of the magnetic working material 11 in a second direction orthogonal to the first direction, and on a third direction of the magnetic working material 11. Figure 9 In the example shown, the first direction is circumferential, the second direction is radial, and the third direction is axial. Furthermore, one end in the second direction is the radially inner side of the magnetic working material 11. On the other end in the second direction ( Figure 9 No magnetic poles 24 are provided on the radial outer side of the magnetic working material 11.

[0147] - Variation 6 of the first embodiment -

[0148] In the first embodiment described above, the magnetic poles 24 of the magnetic field application part 20 may also be arranged on the radial outer side (the other end side in the second direction) and the axial side (third direction) of the magnetic working material 11.

[0149] like Figure 10 As shown, the magnetic field applying part 20 is arranged radially outward of a plurality of magnetic working materials 11. The magnetic field applying part 20 has an iron core 21 and magnetic poles 24. The iron core 21 has a plurality of protrusions 23. The plurality of protrusions 23 protrude radially outward from the center of the iron core 21. The protrusions 23 pass through... Figure 10 Below the magnetic working material 11, it extends radially from the inner side to the outer side of the magnetic working material 11. In other words, the protrusion 23 is arranged to have... Figure 10 The axial surface of the magnetic working material 11 is opposite to the magnetic working material 11 and extends from the radial inner side to the radial outer side of the magnetic working material 11.

[0150] An upright mounting portion 50 is provided at the top end of the protrusion 23. The upright mounting portion 50 is erected along the outer peripheral surface of the magnetic working material 11 and positioned opposite to the magnetic working material 11. The upright mounting portion 50 is arranged to be radially separated from the magnetic working material 11.

[0151] A first magnet 25 is arranged between the magnetic working material 11 and the protrusion 23 of the iron core 21. Magnetic flux flows through the protrusion 23 at a position opposite to the axial direction of the magnetic working material 11. The first magnet 25 and the protrusion 23 constitute the magnetic pole 24 of the magnetic field application part 20.

[0152] The first magnet 25 and the protrusion 23 are spaced apart axially. When the first magnet 25 and the protrusion 23 are positioned opposite the magnetic working material 11, the magnetic flux flows axially along the magnetic working material 11. The direction of the magnetic flux flow is indicated by a dashed arrow.

[0153] The magnetic poles 24 of the magnetic field applying part 20 are arranged on the other end side of the magnetic working material 11 in a second direction orthogonal to the first direction, and in a third direction of the magnetic working material 11. Figure 10 In the example shown, the first direction is circumferential, the second direction is radial, and the third direction is axial. Additionally, the other end in the second direction is the radially outer side of the magnetic working material 11. On one end in the second direction ( Figure 10 No magnetic poles 24 are provided on the radial inner side of the magnetic working material 11.

[0154] - Variation 7 of the first embodiment -

[0155] In a variation of the first embodiment described above, the magnetic poles 24 of the magnetic field application part 20 may be arranged on the radial inner side (one end side in the second direction) and the axial side (third direction) of the magnetic working material 11.

[0156] like Figure 11 As shown, the iron core 30 has a first iron core 31, a second iron core 32, and a permanent magnet 34. The first iron core 31 and the second iron core 32 are composed of plate-like components. The first iron core 31 and the second iron core 32 are spaced apart axially. The permanent magnet 34 is sandwiched between the first iron core 31 and the second iron core 32.

[0157] A plurality of first protrusions 31a are circumferentially spaced on the first iron core 31. The first protrusions 31a are arranged radially separate from the magnetic working material 11. A plurality of second protrusions 32a are circumferentially spaced on the second iron core 32. The second protrusions 32a extend to a position opposite to the lower surface of the magnetic working material 11. The second protrusions 32a are axially separated from the magnetic working material 11. The first protrusions 31a and the second protrusions 32a constitute the magnetic poles 24 of the magnetic field applying part 20.

[0158] When the first protrusion 31a and the second protrusion 32a are positioned opposite the magnetic working material 11, the magnetic flux flows along the axial direction of the magnetic working material 11. The direction of the magnetic flux flow is indicated by a dashed arrow.

[0159] The magnetic poles 24 of the magnetic field applying part 20 are arranged on one end of the magnetic working material 11 in a second direction orthogonal to the first direction, and on a third direction of the magnetic working material 11. Figure 11 In the example shown, the first direction is circumferential, the second direction is radial, and the third direction is axial. Furthermore, one end in the second direction is the radially inner side of the magnetic working material 11. On the other end in the second direction ( Figure 11 No magnetic poles 24 are provided on the radial outer side of the magnetic working material 11.

[0160] - Variation 8 of the first embodiment -

[0161] In a variation of the first embodiment described above, the magnetic poles 24 of the magnetic field application part 20 may be arranged on the radial outer side (the other end side in the second direction) and the axial side (third direction) of the magnetic working material 11.

[0162] like Figure 12 As shown, the iron core 30 has a first iron core 31, a second iron core 32, and a permanent magnet 34. The first iron core 31 and the second iron core 32 are composed of plate-like components. The first iron core 31 and the second iron core 32 are spaced apart axially. The permanent magnet 34 is sandwiched between the first iron core 31 and the second iron core 32.

[0163] A plurality of first protrusions 31a are circumferentially spaced apart on the first iron core 31. The first protrusions 31a are arranged to be radially separated from the magnetic working material 11. A plurality of second protrusions 32a are circumferentially spaced apart on the second iron core 32. The second protrusions 32a extend radially from the radially inner side to the radially outer side of the magnetic working material 11 below it. In other words, the second protrusions 32a are arranged to have a surface axially opposite to the magnetic working material 11 and extend radially from the radially inner side to the radially outer side of the magnetic working material 11. The second protrusions 32a are axially separated from the magnetic working material 11.

[0164] In the second protrusion 32a, the magnetic flux flows through a position opposite to the axial direction of the magnetic working medium 11. The first protrusion 31a and the second protrusion 32a constitute the magnetic pole 24 of the magnetic field applying part 20. When the first protrusion 31a and the second protrusion 32a are opposite to the magnetic working medium 11, the magnetic flux flows along the axial direction of the magnetic working medium 11. The direction of magnetic flux flow is indicated by a dashed arrow.

[0165] The magnetic poles 24 of the magnetic field applying part 20 are arranged on the other end side of the magnetic working material 11 in a second direction orthogonal to the first direction, and in a third direction of the magnetic working material 11. Figure 12In the example shown, the first direction is circumferential, the second direction is radial, and the third direction is axial. Additionally, the other end in the second direction is the radially outer side of the magnetic working material 11. On one end in the second direction ( Figure 12 No magnetic poles 24 are provided on the radial inner side of the magnetic working material 11.

[0166] - Variation 9 of the first embodiment -

[0167] In the first embodiment, multiple magnetic field applying parts 20 and multiple magnetic working materials 11 may be arranged in the axial direction, and they may be rotated relative to each other by a motor 17.

[0168] Second Implementation Method

[0169] The second embodiment will be described.

[0170] like Figure 13 As shown, multiple magnetic working materials 11 are arranged at intervals in the circumferential direction. Figure 13 In the example shown, eight magnetic working materials 11, which are formed in an approximately fan shape, are arranged at equal intervals in the circumferential direction.

[0171] A magnetic yoke 13 with a higher permeability than the magnetic working material 11 is disposed on the magnetic working material 11. The magnetic yoke 13 is disposed at both radial ends of the magnetic working material 11.

[0172] like Figure 14 As shown, the magnetic field applying part 20 moves relative to the magnetic working material 11 along a first direction. Specifically, the magnetic field applying part 20 rotates around the axis along with the rotating shaft 16 as the motor 17 rotates. Thus, the magnetic field applying part 20 rotates relative to the magnetic working material 11. That is to say, the first direction is circumferential.

[0173] The magnetic field applying part 20 is arranged to be axially separated from the magnetic working medium 11. The magnetic field applying part 20 applies a magnetic field to the magnetic working medium 11. The magnetic field applying part 20 has an iron core 21 and magnetic poles 24.

[0174] The iron core 21 is formed of magnetic material. A rotating shaft 16 is connected to the center of the iron core 21. The iron core 21 has multiple protrusions 23.

[0175] Multiple protrusions 23 extend radially outward from the center of the iron core 21. The multiple protrusions 23 are spaced apart circumferentially. Figure 13 In the example shown, four protrusions 23 are arranged at equal intervals in the circumferential direction. The protrusions 23 are arranged to be separated from the magnetic working material 11 in the axial direction. Viewed from the axial direction, the top of the protrusions 23 is formed into an approximately fan shape.

[0176] like Figure 15As shown, the magnetic pole 24 of the magnetic field applying part 20 is arranged only at one end of the magnetic working material 11 in a second direction orthogonal to the first direction. The magnetic working material 11 and the magnetic pole 24 of the magnetic field applying part 20 are spaced apart axially.

[0177] Specifically, a first magnet 25 and a second magnet 26 are arranged between the magnetic working material 11 and the protrusion 23 of the iron core 21. The first magnet 25 and the second magnet 26 constitute the magnetic poles 24 of the magnetic field application part 20.

[0178] Magnetic poles 24 are spaced apart on a third direction orthogonal to the first and second directions of the magnetic working material 11. Figure 15 In the example shown, the first direction is circumferential, the second direction is axial, and the third direction is radial.

[0179] The first magnet 25 and the second magnet 26 constituting the magnetic pole 24 are arranged radially spaced apart. The first magnet 25 and the second magnet 26 apply a magnetic field to the magnetic working material 11, so that the magnetic flux flows radially along the magnetic working material 11.

[0180] The first magnet 25 is arranged such that the magnetic working material 11 is on one side ( Figure 15 The upper side of the core 21 is the N pole, and the protrusion 23 side of the core 21 is the N pole. Figure 15 The lower side of the magnet is the S pole. The second magnet 26 is arranged such that the magnetic working material 11 is on the side ( Figure 15 The upper side of the core 21 is the S pole, and the protrusion 23 side of the core 21 is the S pole. Figure 15 The lower side of the magnet is the N pole. It should be noted that the N pole and S pole position relationship in the first magnet 25 and the second magnet 26 can also be reversed.

[0181] The first magnet 25 and the second magnet 26, together with the iron core 21, rotate relative to the magnetic working material 11 in the circumferential direction. When the first magnet 25 and the second magnet 26 are positioned opposite the magnetic working material 11, the magnetic flux flows radially along the magnetic working material 11. It should be noted that the direction of magnetic flux flow is indicated by dashed arrows.

[0182] The first magnet 25 and the second magnet 26 are arranged opposite to the magnetic working material 11. Specifically, when viewing the magnetic working material 11 through which the magnetic flux flows from the axial direction, the first magnet 25 and the second magnet 26 are arranged along two radially opposite sides of the magnetic working material 11. The magnetic field applying unit 20 applies a magnetic field to the magnetic working material 11.

[0183] In the magnetic cooling device 10, magnetic flux flows from the first magnet 25 toward... Figure 15The magnetic flux flows radially within the inner yoke 13. Magnetic flux flows radially from the inner yoke 13 to the outer yoke 13 within the magnetic working material 11. Magnetic flux flows from the outer yoke 13 towards the second magnet 26. Magnetic flux flows radially from the second magnet 26 towards the first magnet 25 within the protrusion 23 of the iron core 21. As a result, the magnetic working material 11, to which the magnetic field is applied, heats up.

[0184] Then, the magnetic field applying part 20 is rotated, so that the first magnet 25 and the second magnet 26 are opposite to the adjacent magnetic working material 11. As a result, the magnetic working material 11, which was initially subjected to a magnetic field, is demagnetized and absorbs heat. On the other hand, the adjacent magnetic working material 11 is subjected to a magnetic field and generates heat.

[0185] -Effects of the second implementation method-

[0186] According to the features of this embodiment, the relative movement is a relative rotational movement about a predetermined axis. The first direction is circumferential, the second direction is axial, and the third direction is radial. The magnetic working material 11 and the magnetic poles 24 of the magnetic field applying part 20 are spaced apart axially. The magnetic poles 24 of the magnetic field applying part 20 are spaced apart radially.

[0187] This allows the magnetic flux to flow radially along the magnetic working material 11.

[0188] -Modification 1 of the second embodiment-

[0189] In the second embodiment, the first protrusion 35 and the second protrusion 36 may also constitute the magnetic poles 24 of the magnetic field application part 20.

[0190] like Figure 16 As shown, the magnetic field applying part 20 has an iron core 21 and a permanent magnet 34. The iron core 21 has a plurality of protrusions 23. A first protrusion 35 and a second protrusion 36 are provided at the top end of the protrusions 23. The first protrusion 35 and the second protrusion 36 constitute the magnetic poles 24 of the magnetic field applying part 20.

[0191] The first protrusion 35 and the second protrusion 36 protrude toward the magnetic working material 11. The first protrusion 35 and the second protrusion 36 are radially spaced apart. The first protrusion 35 is positioned radially inward than the second protrusion 36. The permanent magnet 34 is embedded in the protrusion 23 at the position between the first protrusion 35 and the second protrusion 36.

[0192] exist Figure 16 In the example shown, the permanent magnet 34 is arranged such that: on the side of the first protrusion 35 ( Figure 16 The radial inner side) is the N pole, and the second protrusion 36 side ( Figure 16The outermost radial part of the magnet is the S pole. It should be noted that the positional relationship between the N pole and the S pole of the permanent magnet 34 can also be reversed.

[0193] When the first protrusion 35 and the second protrusion 36 are positioned opposite the magnetic working material 11, the magnetic flux flows radially along the magnetic working material 11. It should be noted that the direction of magnetic flux flow is indicated by dashed arrows.

[0194] When the magnetic flux flowing through the magnetic working medium 11 is viewed from the axial direction, the first protrusion 35 and the second protrusion 36 are respectively provided along the two radial sides of the magnetic working medium 11. The magnetic field applying part 20 applies a magnetic field to the magnetic working medium 11.

[0195] Specifically, in the magnetic cooling device 10, magnetic flux flows from the permanent magnet 34 toward the first protrusion 35 of the iron core 21. Figure 16 The magnetic flux flows radially within the inner yoke 13. Magnetic flux flows radially from the inner yoke 13 to the outer yoke 13 within the magnetic working material 11. Magnetic flux flows from the outer yoke 13 toward the second protrusion 36. Magnetic flux flows from the second protrusion 36 toward the permanent magnet 34. As a result, the magnetic working material 11, to which the magnetic field is applied, heats up.

[0196] Then, the magnetic field applying part 20 is rotated so that the first protrusion 35 and the second protrusion 36 are opposite to the adjacent magnetic working material 11. As a result, the magnetic working material 11, which was initially subjected to a magnetic field, is demagnetized and absorbs heat. On the other hand, the adjacent magnetic working material 11 is subjected to a magnetic field and generates heat.

[0197] -Modification 2 of the second embodiment-

[0198] In the first embodiment described above, the magnetic pole 24 of the magnetic field application part 20 may also be formed by the first magnet 25 and the magnetic pole protrusion 51.

[0199] like Figure 17 As shown, the magnetic field applying part 20 has an iron core 21 and magnetic poles 24. The iron core 21 has a plurality of protrusions 23. The plurality of protrusions 23 protrude radially outward from the center of the iron core 21. The protrusions 23 are arranged to be axially separated from the magnetic working material 11.

[0200] A first magnet 25 and a pole protrusion 51 are arranged between the magnetic working material 11 and the protrusion 23 of the iron core 21. The pole protrusion 51 protrudes from the protrusion 23 of the iron core 21 toward the magnetic working material 11. The first magnet 25 and the pole protrusion 51 constitute the magnetic pole 24 of the magnetic field application part 20. The first magnet 25 and the pole protrusion 51 are arranged radially spaced apart. When the first magnet 25 and the pole protrusion 51 are positioned opposite the magnetic working material 11, magnetic flux flows radially along the magnetic working material 11. The direction of magnetic flux flow is indicated by a dashed arrow.

[0201] - Variation 3 of the second embodiment -

[0202] In the second embodiment described above, the magnetic poles 24 of the magnetic field application part 20 may also be arranged on the axial lower side (one end side in the second direction) and the radial outer side (the other end side in the third direction) of the magnetic working material 11.

[0203] like Figure 18 As shown, the magnetic field applying part 20 has an iron core 21 and magnetic poles 24. The iron core 21 has a plurality of protrusions 23. The plurality of protrusions 23 protrude radially outward from the center of the iron core 21. The protrusions 23 are arranged to be axially separated from the magnetic working material 11.

[0204] A first magnet 25 is arranged between the protrusion 23 of the magnetic working material 11 and the iron core 21. The protrusion 23 extends radially from the inner side to the outer side of the magnetic working material 11, passing below it. An upright mounting portion 50 is provided on the protrusion 23. The upright mounting portion 50 extends along the outer peripheral surface of the magnetic working material 11 to a position radially opposite to the magnetic working material 11. The upright mounting portion 50 is arranged to be radially separated from the magnetic working material 11.

[0205] In the vertical mounting section 50, magnetic flux flows through a position opposite to the outer peripheral surface of the magnetic working material 11. The first magnet 25 and the vertical mounting section 50 constitute the magnetic pole 24 of the magnetic field application section 20. When the first magnet 25 and the vertical mounting section 50 are positioned opposite the magnetic working material 11, the magnetic flux flows radially along the magnetic working material 11. The direction of magnetic flux flow is indicated by a dashed arrow.

[0206] The magnetic poles 24 of the magnetic field applying part 20 are arranged on one end of the magnetic working material 11 in a second direction orthogonal to the first direction, and on the other end in a third direction. Figure 18 In the example shown, the first direction is circumferential, the second direction is axial, and the third direction is radial. Furthermore, one end in the second direction is the axially lower side of the magnetic working material 11. On the other end in the second direction ( Figure 18 No magnetic poles 24 are provided on the axial upper side of the magnetic working material 11. Furthermore, the other end side, in the third-direction upward direction, is the radially outer side of the magnetic working material 11. On the third-direction upward end side ( Figure 18 No magnetic poles 24 are provided on the radial inner side of the magnetic working material 11.

[0207] - Variation 4 of the second embodiment -

[0208] In the second embodiment described above, the magnetic poles 24 of the magnetic field application part 20 may also be arranged on the axial lower side (one end side in the second direction) and the radial inner side (one end side in the third direction) of the magnetic working material 11.

[0209] like Figure 19 As shown, the magnetic field applying part 20 is arranged to be axially separated from the magnetic working material 11. The magnetic field applying part 20 has an iron core 21 and magnetic poles 24. The iron core 21 has a plurality of protrusions 23. The plurality of protrusions 23 protrude radially outward from the center of the iron core 21. The protrusions 23 are arranged to be axially separated from the magnetic working material 11.

[0210] A first magnet 25 is arranged between the magnetic working material 11 and the protrusion 23 of the iron core 21. An upright mounting portion 50 is provided on the protrusion 23. The upright mounting portion 50 extends along the inner circumferential surface of the magnetic working material 11 to a position opposite to the magnetic working material 11 in the radial direction. The upright mounting portion 50 is arranged to be radially separated from the magnetic working material 11.

[0211] In the vertical mounting section 50, magnetic flux flows through a position opposite to the inner circumferential surface of the magnetic working material 11. The first magnet 25 and the vertical mounting section 50 constitute the magnetic pole 24 of the magnetic field application section 20. When the first magnet 25 and the vertical mounting section 50 are positioned opposite the magnetic working material 11, the magnetic flux flows radially along the magnetic working material 11. The direction of magnetic flux flow is indicated by a dashed arrow.

[0212] The magnetic poles 24 of the magnetic field applying part 20 are arranged on one end of the magnetic working material 11 in a second direction orthogonal to the first direction and on the other end in a third direction. Figure 19 In the example shown, the first direction is circumferential, the second direction is axial, and the third direction is radial. Furthermore, one end in the second direction is the axially lower side of the magnetic working material 11. On the other end in the second direction ( Figure 19 No magnetic poles 24 are provided on the axial upper side of the magnetic working material 11. Furthermore, the third-direction upward end is the radially inner side of the magnetic working material 11. On the other third-direction upward end ( Figure 19 No magnetic poles 24 are provided on the radial outer side of the magnetic working material 11.

[0213] - Variation 5 of the second embodiment -

[0214] In the modified example 1 of the second embodiment described above, the magnetic poles 24 of the magnetic field application part 20 may also be arranged on the axial lower side (one end side in the second direction) and the radial outer side (the other end side in the third direction) of the magnetic working material 11.

[0215] like Figure 20 As shown, the magnetic field application part 20 has an iron core 21 and a permanent magnet 34. The iron core 21 has a plurality of protrusions 23. The protrusions 23 extend from the radially inner side to the radially outer side of the magnetic working material 11 below it. A first protrusion 35 and a second protrusion 36 are provided on the protrusions 23.

[0216] The first protrusion 35 and the second protrusion 36 are provided radially spaced apart. The first protrusion 35 is arranged at a position radially inward than the second protrusion 36. The permanent magnet 34 is embedded in the protrusion 23 at a position between the first protrusion 35 and the second protrusion 36.

[0217] A first protrusion 35 is disposed on the lower side of the magnetic working material 11. A second protrusion 36 extends from the protrusion 23 along the outer peripheral surface of the magnetic working material 11 to a position radially opposite to the magnetic working material 11. The second protrusion 36 is arranged to be radially separated from the magnetic working material 11. Magnetic flux flows through the second protrusion 36 at the position opposite to the outer peripheral surface of the magnetic working material 11. The first protrusion 35 and the second protrusion 36 constitute the magnetic pole 24 of the magnetic field applying part 20.

[0218] When the first protrusion 35 and the second protrusion 36 are positioned opposite the magnetic working material 11, the magnetic flux flows radially along the magnetic working material 11. The direction of the magnetic flux flow is indicated by a dashed arrow.

[0219] The magnetic poles 24 of the magnetic field applying part 20 are arranged on one end of the magnetic working material 11 in a second direction orthogonal to the first direction, and on the other end in a third direction. Figure 20 In the example shown, the first direction is circumferential, the second direction is axial, and the third direction is radial. Furthermore, one end in the second direction is the axially lower side of the magnetic working material 11. On the other end in the second direction ( Figure 20 No magnetic poles 24 are provided on the axial upper side of the magnetic working material 11. Furthermore, the other end side, in the third-direction upward direction, is the radially outer side of the magnetic working material 11. On the third-direction upward end side ( Figure 20 No magnetic poles 24 are provided on the radial inner side of the magnetic working material 11.

[0220] - Variation 6 of the second embodiment -

[0221] In the modified example 1 of the second embodiment described above, the magnetic poles 24 of the magnetic field application part 20 may also be arranged on the axial lower side (one end side in the second direction) and the radial inner side (one end side in the third direction) of the magnetic working material 11.

[0222] like Figure 21 As shown, the magnetic field application part 20 has an iron core 21 and a permanent magnet 34. The iron core 21 has a plurality of protrusions 23. The protrusions 23 are arranged to be axially separated from the magnetic working material 11.

[0223] A first protrusion 35 and a second protrusion 36 are provided on the protrusion 23. The first protrusion 35 and the second protrusion 36 are radially spaced apart. The first protrusion 35 is arranged at a position radially inward than the second protrusion 36. A permanent magnet 34 is embedded in the protrusion 23 at a position located between the first protrusion 35 and the second protrusion 36.

[0224] A first protrusion 35 extends from the protrusion 23 along the outer peripheral surface of the magnetic working material 11 to a position radially opposite to the magnetic working material 11. The first protrusion 35 is arranged to be radially separated from the magnetic working material 11. Magnetic flux flows through the first protrusion 35 at the position opposite to the outer peripheral surface of the magnetic working material 11. A second protrusion 36 is arranged on the underside of the magnetic working material 11. The first protrusion 35 and the second protrusion 36 constitute the magnetic pole 24 of the magnetic field applying part 20.

[0225] When the first protrusion 35 and the second protrusion 36 are positioned opposite the magnetic working material 11, the magnetic flux flows radially along the magnetic working material 11. The direction of the magnetic flux flow is indicated by a dashed arrow.

[0226] The magnetic poles 24 of the magnetic field applying part 20 are arranged on one end of the magnetic working material 11 in a second direction orthogonal to the first direction, and on the other end in a third direction. Figure 21 In the example shown, the first direction is circumferential, the second direction is axial, and the third direction is radial. Furthermore, one end in the second direction is the axially lower side of the magnetic working material 11. On the other end in the second direction ( Figure 21 No magnetic poles 24 are provided on the axial upper side of the magnetic working material 11. Furthermore, the third-direction upward end is the radially inner side of the magnetic working material 11. On the other third-direction upward end ( Figure 21 No magnetic poles 24 are provided on the radial outer side of the magnetic working material 11.

[0227] - Variation 7 of the second embodiment -

[0228] In the second embodiment, multiple magnetic field applying units 20 and multiple magnetic working materials 11 may be arranged axially, and they may be rotated relative to each other using a motor 17. Alternatively, multiple magnetic field applying units 20 and multiple magnetic working materials 11 may be arranged radially, and they may be rotated relative to each other using a motor 17.

[0229] Third Implementation Method

[0230] The third embodiment will be described.

[0231] like Figure 22 As shown, the magnetic refrigeration device 10 includes a magnetic working medium 11, a magnetic field application part 20, and a linear motion mechanism 40.

[0232] The linear motion mechanism 40 has a cylinder 41 and a cylinder rod 42. The cylinder rod 42 moves forward and backward axially relative to the cylinder 41. A magnetic field application part 20 is connected to the cylinder rod 42.

[0233] The magnetic field applying part 20 moves relative to the magnetic working material 11 along a first direction. Specifically, the magnetic field applying part 20 moves linearly along the first direction together with the cylinder rod 42, driven by the cylinder 41. Thus, the magnetic field applying part 20 moves linearly relative to the magnetic working material 11. That is, the first direction is the axial direction of the cylinder rod 42.

[0234] Two magnetic working materials 11 are arranged at intervals in a first direction. The magnetic working materials 11 are arranged in a second direction orthogonal to the first direction. Figure 22 It is separated from the magnetic field application part 20 in the left and right directions.

[0235] A magnetic yoke 13 with a higher permeability than the magnetic working material 11 is disposed on the magnetic working material 11. The magnetic yoke 13 is disposed on a third direction of the magnetic working material 11 that is orthogonal to the first direction and the second direction. Figure 23 The two ends in the vertical direction.

[0236] The magnetic field applying part 20 applies a magnetic field to the magnetic working medium 11. The magnetic field applying part 20 has an iron core 21 and magnetic poles 24. The iron core 21 is formed of a magnetic material. A cylinder rod 42 is connected to the iron core 21.

[0237] Just like Figure 23 As shown, the magnetic poles 24 of the magnetic field applying part 20 are arranged in the second direction of the magnetic working material 11. Figure 23 The magnetic working material 11 and the magnetic pole 24 of the magnetic field application part 20 are spaced apart in the second direction.

[0238] The magnetic pole 24 of the magnetic field application part 20 is in the third direction of the iron core 21. Figure 23 The first magnet 25 and the second magnet 26 are spaced apart in the vertical direction. Specifically, a first magnet 25 and a second magnet 26 are arranged between the magnetic working material 11 and the iron core 21. The first magnet 25 and the second magnet 26 are spaced apart in the vertical direction. The first magnet 25 and the second magnet 26 constitute the magnetic poles 24 of the magnetic field applying part 20.

[0239] The first magnet 25 and the second magnet 26 apply a magnetic field to the magnetic working medium 11 so that the magnetic flux flows in a third direction along the magnetic working medium 11.

[0240] The first magnet 25 is arranged such that the magnetic working material 11 is on one side ( Figure 23 The left side of the core is the N pole, and the side of core 21 is the N pole. Figure 23 The right side of the magnet is the S pole. The second magnet 26 is arranged such that the magnetic working material 11 is on the side ( Figure 23 The left side of the core is the S pole, and the side of core 21 is the S pole. Figure 23 The right side of the image shows the N pole. It should be noted that the N pole and S pole positions in the first magnet 25 and the second magnet 26 can also be reversed.

[0241] The first magnet 25 and the second magnet 26, together with the iron core 21, move in a straight line relative to the magnetic working material 11 along a first direction. When the first magnet 25 and the second magnet 26 are positioned opposite the magnetic working material 11, the magnetic flux flows along a third direction of the magnetic working material 11. It should be noted that the direction of magnetic flux flow is indicated by dashed arrows.

[0242] The first magnet 25 and the second magnet 26 are arranged opposite to the magnetic working material 11. Specifically, when viewing the magnetic working material 11 through which the magnetic flux flows from the second direction, the first magnet 25 and the second magnet 26 are arranged along the two ends of the magnetic working material 11 in the third direction, respectively. The magnetic field applying unit 20 applies a magnetic field to the magnetic working material 11.

[0243] In the magnetic cooling device 10, magnetic flux flows from the first magnet 25 toward... Figure 23 The magnetic flux flows along the upper yoke 13. Magnetic flux flows from the upper yoke 13 to the lower yoke 13 along a third direction within the magnetic working material 11. Magnetic flux flows from the lower yoke 13 toward the second magnet 26. Magnetic flux flows from the second magnet 26 toward the first magnet 25 along a third direction within the iron core 21. As a result, the magnetic working material 11, to which the magnetic field is applied, heats up.

[0244] Then, as Figure 24 As shown, the magnetic field applying part 20 is moved linearly, so that the first magnet 25 and the second magnet 26 are opposite to the adjacent magnetic working material 11. As a result, the magnetic working material 11, which was initially subjected to a magnetic field, absorbs heat when the magnetic field is removed. On the other hand, the adjacent magnetic working material 11 is heated when a magnetic field is applied.

[0245] -Effects of the third implementation method-

[0246] According to the features of this embodiment, the relative movement is a linear movement along a first direction. The magnetic working material 11 and the magnetic poles 24 of the magnetic field applying part 20 are spaced apart in a second direction. The magnetic poles 24 of the magnetic field applying part 20 are spaced apart in a third direction.

[0247] Therefore, a magnetic refrigeration device is provided that allows the magnetic field application unit 20 to move linearly relative to the magnetic working medium 11.

[0248] -Modification 1 of the Third Embodiment-

[0249] In the third embodiment, the magnetic pole 24 of the magnetic field application part 20 may also be formed by the first protrusion 31a of the first iron core 31 and the second protrusion 32a of the second iron core 32.

[0250] like Figure 25As shown, the iron core 30 has a first iron core 31, a second iron core 32, and a permanent magnet 34. The first iron core 31 and the second iron core 32 are composed of plate-like components. The first iron core 31 and the second iron core 32 are in a third direction (…). Figure 25 The permanent magnet 34 is sandwiched between the first iron core 31 and the second iron core 32, spaced apart in the vertical direction.

[0251] exist Figure 25 In the example shown, the permanent magnet 34 is arranged such that: on the side of the first iron core 31 ( Figure 25 The upper side of the middle core is the N pole, and the second iron core 32 side ( Figure 25 The lower part of the magnet is the S pole. It should be noted that the N pole and S pole of the permanent magnet 34 can also be reversed.

[0252] A first protrusion 31a is provided on the first iron core 31. A second protrusion 32a is provided on the second iron core 32. The first iron core 31 and the second iron core 32 have the same shape when viewed from the axial direction and are formed in the same position. The first protrusion 31a and the second protrusion 32a constitute the magnetic poles 24 of the magnetic field applying part 20.

[0253] When the first protrusion 31a and the second protrusion 32a are positioned opposite the magnetic working material 11, the magnetic flux travels along the third direction of the magnetic working material 11. Figure 25 The magnetic flux flows in the vertical direction. It should be noted that dashed arrows indicate the direction of magnetic flux flow.

[0254] Specifically, in the magnetic cooling device 10, magnetic flux flows from the permanent magnet 34 toward the first protrusion 31a of the first iron core 31. Magnetic flux flows from the first protrusion 31a toward... Figure 25 The magnetic flux flows along the upper yoke 13. The magnetic flux flows from the upper yoke 13 to the lower yoke 13 in a third direction. Figure 25 The magnetic flux flows (up and down) within the magnetic working material 11. Magnetic flux flows from the lower yoke 13 toward the second protrusion 32a of the second iron core 32. Magnetic flux flows from the second protrusion 32a toward the permanent magnet 34. As a result, the magnetic working material 11, to which the magnetic field is applied, heats up.

[0255] Then, the magnetic field applying part 20 is moved linearly so that the first protrusion 31a and the second protrusion 32a are opposite to the adjacent magnetic working material 11. As a result, the magnetic working material 11, which was initially subjected to a magnetic field, absorbs heat after the magnetic field is removed. On the other hand, the adjacent magnetic working material 11 is heated by the applied magnetic field.

[0256] -Modification 2 of the third embodiment-

[0257] In the third embodiment described above, the magnetic pole 24 of the magnetic field application part 20 may also be formed by the first magnet 25 and the magnetic pole protrusion 51.

[0258] like Figure 26 As shown, the magnetic field applying part 20 has an iron core 21 and magnetic poles 24. The magnetic poles 24 of the magnetic field applying part 20 are arranged in the second direction of the magnetic working material 11. Figure 26 The magnetic working material 11 and the magnetic pole 24 of the magnetic field application part 20 are spaced apart in the second direction.

[0259] A first magnet 25 and a magnetic pole protrusion 51 are arranged between the magnetic working material 11 and the iron core 21. The magnetic pole protrusion 51 protrudes radially inward from the lower end of the iron core 21. The first magnet 25 and the magnetic pole protrusion 51 are in a third direction ( Figure 26 The magnetic poles of the magnetic field application part 20 are arranged at intervals in the vertical direction. The first magnet 25 and the magnetic pole protrusion 51 constitute the magnetic poles 24 of the magnetic field application part 20.

[0260] When the first magnet 25 and the magnetic pole protrusion 51 are positioned opposite the magnetic working material 11, the magnetic flux flows in a third direction along the magnetic working material 11. The direction of the magnetic flux flow is indicated by a dashed arrow.

[0261] - Variation 3 of the second embodiment -

[0262] In the third embodiment described above, the magnetic poles 24 of the magnetic field application unit 20 may also be arranged on one end of the magnetic working material 11 in the second direction and in the third direction of the magnetic working material 11.

[0263] like Figure 27 As shown, the magnetic field applying part 20 has an iron core 21 and magnetic poles 24. The magnetic poles 24 of the magnetic field applying part 20 are arranged in the second direction of the magnetic working material 11. Figure 27 One end side (in the left and right direction) Figure 27 (right side), and the third direction of magnetic working material 11 ( Figure 27 One end side in the vertical direction (in) Figure 27 (the lower side).

[0264] A first magnet 25 is arranged between the magnetic working material 11 and the iron core 21. The first magnet 25 is arranged to be separated from the magnetic working material 11 in a second direction. A magnetic pole protrusion 51 is provided on the iron core 21. The magnetic pole protrusion 51 protrudes radially inward from the lower end of the iron core 21. The magnetic pole protrusion 51 extends below the magnetic working material 11 to a position opposite to the magnetic working material 11. The magnetic pole protrusion 51 is arranged to be separated from the magnetic working material 11 in a third direction. The first magnet 25 and the magnetic pole protrusion 51 constitute the magnetic pole 24 of the magnetic field application part 20.

[0265] When the first magnet 25 and the magnetic pole protrusion 51 are positioned opposite the magnetic working material 11, the magnetic flux flows in a third direction along the magnetic working material 11. The direction of the magnetic flux flow is indicated by a dashed arrow.

[0266] The magnetic poles 24 of the magnetic field applying part 20 are arranged on one end of the magnetic working material 11 in a second direction orthogonal to the first direction. Figure 27 (right side of the middle), and the third side upward ( Figure 27 (The lower side of the middle). On the other end side in the second direction ( Figure 27 The left side of the middle section does not have magnetic pole 24. On the other end (the third direction upwards) Figure 27 The upper side of the middle section does not have magnetic pole 24.

[0267] - Variation 4 of the second embodiment -

[0268] In a variation of the third embodiment described above, the magnetic poles 24 of the magnetic field application unit 20 may be arranged on one end of the magnetic working material 11 in the second direction and in the third direction of the magnetic working material 11.

[0269] like Figure 28 As shown, the iron core 30 has a first iron core 31, a second iron core 32, and a permanent magnet 34. The first iron core 31 and the second iron core 32 are in a third direction ( Figure 28 The permanent magnet 34 is sandwiched between the first iron core 31 and the second iron core 32, spaced apart in the vertical direction.

[0270] A first protrusion 31a is provided on the first iron core 31. The first protrusion 31a is arranged in a second direction ( Figure 28 It separates from the magnetic working material 11 in the left and right directions.

[0271] A second protrusion 32a is provided on the second iron core 32. The second protrusion 32a extends from below the magnetic working material 11 to a position opposite to the magnetic working material 11. The magnetic pole protrusion 51 is configured to be separated from the magnetic working material 11 in a third direction. The first protrusion 31a and the second protrusion 32a constitute the magnetic pole 24 of the magnetic field applying part 20.

[0272] When the first protrusion 31a and the second protrusion 32a are positioned opposite the magnetic working material 11, the magnetic flux flows in a third direction along the magnetic working material 11. The direction of the magnetic flux flow is indicated by a dashed arrow.

[0273] The magnetic poles 24 of the magnetic field applying part 20 are arranged on one end of the magnetic working material 11 in a second direction orthogonal to the first direction. Figure 28 (right side of the middle), and the third-direction upward end of the magnetic working material 11 ( Figure 28 (The lower side of the middle). On the other end side in the second direction ( Figure 28 The left side of the middle section does not have magnetic pole 24. On the other end (the third direction upwards) Figure 28 The upper side of the middle section does not have magnetic pole 24.

[0274] -Modification 5 of the third embodiment-

[0275] In the third embodiment, multiple magnetic field applying units 20 and multiple magnetic working materials 11 may be arranged, and they may be moved in a relatively linear manner by a cylinder 41.

[0276] Fourth Implementation Method

[0277] The fourth embodiment will be described.

[0278] like Figure 29 As shown, multiple magnetic working materials 11 are arranged at intervals in the circumferential direction. Figure 29 In the example shown, eight magnetic working materials 11 extending in an arc along the circumference are arranged at equal intervals along the circumference.

[0279] A magnetic field applying part 20 is arranged radially inside a plurality of magnetic working materials 11. The magnetic field applying part 20 moves relative to the magnetic working materials 11 in a first direction (circumferential direction). The magnetic field applying part 20 applies a magnetic field to the magnetic working materials 11.

[0280] The magnetic field applying part 20 has an iron core 21 and magnetic poles 24. The iron core 21 has a plurality of protrusions 23. The plurality of protrusions 23 protrude radially outward from the center of the iron core 21. The plurality of protrusions 23 are spaced apart in the circumferential direction. Figure 29 In the example shown, there are two protrusions 23 arranged at equal intervals in the circumferential direction.

[0281] The magnetic poles 24 of the magnetic field applying section 20 are arranged at one end of the magnetic working material 11 in a second direction (radial) orthogonal to the first direction. A first magnet 25 and a second magnet 26 are arranged between the magnetic working material 11 and the protrusion 23 of the iron core 21. The first magnet 25 and the second magnet 26 constitute the magnetic poles 24 of the magnetic field applying section 20.

[0282] The magnetic poles 24 are spaced apart in a third direction (axial direction) of the magnetic working material 11 that is orthogonal to the first and second directions.

[0283] Here, the length W1 of the surface of the magnetic pole 24 of the magnetic field application part 20 facing the magnetic working material 11 in the first direction (circumferential direction) is greater than the length W2 of the surface of the magnetic working material 11 facing the magnetic pole 24 of the magnetic field application part 20 in the first direction (circumferential direction).

[0284] -Effects of the fourth implementation method-

[0285] According to the features of this embodiment, the length of the surface of the magnetic pole 24 of the magnetic field application part 20 facing the magnetic working material 11 in the first direction is greater than the length of the surface of the magnetic working material 11 facing the magnetic pole 24 of the magnetic field application part 20 in the first direction.

[0286] Therefore, without increasing the magnetic resistance, the alignment accuracy between the magnetic working material 11 and the magnetic pole 24 of the magnetic field application part 20 can be reduced.

[0287] -Modification 1 of the Fourth Embodiment-

[0288] In the fourth embodiment described above, the magnetic poles 24 of the magnetic field application section 20 may also be arranged on the radial outer side of the magnetic working material 11.

[0289] like Figure 30 As shown, the magnetic field applying part 20 is arranged radially outside the plurality of magnetic working materials 11. The magnetic field applying part 20 has an iron core 21 and magnetic poles 24. The iron core 21 has a plurality of protrusions 23. The protrusions 23 extend radially outward from the radially inner side of the magnetic working material 11 through the lower side of the magnetic working material 11.

[0290] An upright mounting portion 50 is provided at the top end of the protrusion 23. The upright mounting portion 50 is erected along the outer peripheral surface of the magnetic working material 11 and positioned opposite to the magnetic working material 11. The upright mounting portion 50 is arranged to be radially separated from the magnetic working material 11.

[0291] A first magnet 25 and a second magnet 26 are arranged between the magnetic working material 11 and the vertically mounted portion 50 of the iron core 21. The first magnet 25 and the second magnet 26 are spaced apart axially. The first magnet 25 and the second magnet 26 constitute the magnetic pole 24 of the magnetic field applying portion 20. The magnetic working material 11 and the magnetic pole 24 of the magnetic field applying portion 20 are spaced apart radially.

[0292] When the first magnet 25 and the second magnet 26 are positioned opposite the magnetic working material 11, the magnetic flux flows along the axial direction of the magnetic working material 11. The direction of the magnetic flux flow is indicated by a dashed arrow.

[0293] -Modification 2 of the fourth embodiment-

[0294] In the fourth embodiment, multiple magnetic field applying parts 20 and multiple magnetic working materials 11 may be arranged in the axial direction, and they may be moved relative to each other by a motor 17.

[0295] Fifth Implementation Method

[0296] The fifth embodiment will be described.

[0297] like Figure 31 As shown, multiple magnetic working materials 11 are arranged at intervals in the circumferential direction. Figure 31 In the example shown, eight magnetic working materials 11, which are formed in an approximately fan shape, are arranged at equal intervals in the circumferential direction.

[0298] The magnetic field applying part 20 is arranged to be axially separated from the magnetic working material 11. Also as... Figure 32As shown, the magnetic field applying unit 20 moves relative to the magnetic working material 11 along a first direction (circumferential direction). The magnetic field applying unit 20 applies a magnetic field to the magnetic working material 11.

[0299] The magnetic field applying part 20 has an iron core 21 and magnetic poles 24. The iron core 21 has a plurality of protrusions 23. The plurality of protrusions 23 protrude radially outward from the center of the iron core 21. The plurality of protrusions 23 are spaced apart in the circumferential direction. Figure 32 In the example shown, two protrusions 23 are arranged at equal intervals in the circumferential direction. Viewed axially, the top of the protrusions 23 is formed in an approximately fan shape.

[0300] The magnetic poles 24 of the magnetic field applying section 20 are arranged at one end of the magnetic working material 11 in a second direction (axial direction) orthogonal to the first direction. A first magnet 25 and a second magnet 26 are arranged between the magnetic working material 11 and the protrusion 23 of the iron core 21. The first magnet 25 and the second magnet 26 constitute the magnetic poles 24 of the magnetic field applying section 20.

[0301] The magnetic poles 24 are spaced apart in a third radial direction of the magnetic working material 11, which is orthogonal to the first and second directions.

[0302] Here, the length W1 of the surface of the magnetic pole 24 of the magnetic field application part 20 facing the magnetic working material 11 in the first direction (circumferential direction) is greater than the length W2 of the surface of the magnetic working material 11 facing the magnetic pole 24 of the magnetic field application part 20 in the first direction (circumferential direction).

[0303] -Effects of the fifth implementation method-

[0304] According to the features of this embodiment, the length of the surface of the magnetic pole 24 of the magnetic field application part 20 facing the magnetic working material 11 in the first direction is greater than the length of the surface of the magnetic working material 11 facing the magnetic pole 24 of the magnetic field application part 20 in the first direction.

[0305] Therefore, the alignment accuracy between the magnetic working material 11 and the magnetic pole 24 of the magnetic field application part 20 can be reduced without increasing the magnetic resistance.

[0306] -Modifications of the fifth embodiment-

[0307] In the fifth embodiment, multiple magnetic field applying units 20 and multiple magnetic working materials 11 may be arranged axially, and they may be rotated relative to each other using a motor 17. Alternatively, multiple magnetic field applying units 20 and multiple magnetic working materials 11 may be arranged radially, and they may be rotated relative to each other using a motor 17.

[0308] (Sixth Implementation Method)

[0309] The sixth embodiment will be described.

[0310] like Figure 33 As shown, the magnetic field applying part 20 has an iron core 21, magnetic poles 24 and a holding member 55.

[0311] The iron core 21 is formed of a magnetic material. A retaining member 55 is provided at the center of the iron core 21. The iron core 21 is held by the retaining member 55. The iron core 21 has a plurality of protrusions 23. The plurality of protrusions 23 protrude radially outward from the center of the iron core 21. The protrusions 23 are arranged to be radially separated from the magnetic working material 11.

[0312] The retaining member 55 is a cylindrical component. The retaining member 55 is formed of a non-magnetic material, such as aluminum or resin. A rotating shaft 16 is connected to the center of the retaining member 55.

[0313] A first magnet 25 and a second magnet 26 are arranged between the magnetic working material 11 and the protrusion 23 of the iron core 21. The first magnet 25 and the second magnet 26 constitute the magnetic poles 24 of the magnetic field application part 20. The first magnet 25 and the second magnet 26 are spaced apart axially. When the first magnet 25 and the second magnet 26 are positioned opposite the magnetic working material 11, the magnetic flux flows along the axial direction of the magnetic working material 11. The direction of magnetic flux flow is indicated by a dashed arrow.

[0314] It should be noted that in this sixth embodiment, a structure is described that uses a non-magnetic material holding member 55 to hold the magnetic material core 21, but the same structure can also be used in other embodiments and variations.

[0315] -Effects of the sixth implementation method-

[0316] According to the features of this embodiment, by using a magnetic material to make the iron core 21 through which the magnetic flux flows, and by using a holding member 55 made of a non-magnetic material to hold the iron core 21, magnetic flux leakage between adjacent magnetic poles 24 in the first direction can be further reduced. In addition, by using a component (e.g., aluminum or resin) that is lighter per unit volume than the iron core 21 as the holding member 55, the overall weight reduction of the magnetic cooling device 10 can be achieved.

[0317] -Sixth Embodiment Variation 1-

[0318] In the sixth embodiment described above, the magnetic field application part 20 may also be formed into a cylindrical shape.

[0319] like Figure 34 and Figure 35 As shown, the magnetic field applying part 20 has an iron core 21, magnetic poles 24 and a holding member 55.

[0320] The iron core 21 is formed of a magnetic material. A retaining member 55 is provided at the center of the iron core 21. The iron core 21 is held by the retaining member 55. The iron core 21 has a plurality of protrusions 23. The plurality of protrusions 23 protrude radially outward from the center of the iron core 21. The protrusions 23 are arranged to be radially separated from the magnetic working material 11.

[0321] A first magnet 25 and a second magnet 26 are arranged between the magnetic working material 11 and the protrusion 23 of the iron core 21. The first magnet 25 and the second magnet 26 constitute the magnetic poles 24 of the magnetic field application part 20. The first magnet 25 and the second magnet 26 are spaced apart axially. When the first magnet 25 and the second magnet 26 are positioned opposite the magnetic working material 11, the magnetic flux flows along the axial direction of the magnetic working material 11. The direction of magnetic flux flow is indicated by a dashed arrow.

[0322] A retaining member 55 is disposed between the center of the iron core 21 and a plurality of protrusions 23 spaced apart in the circumferential direction, and between the first magnet 25 and the second magnet 26 constituting the magnetic pole 24. The retaining member 55 is formed of a non-magnetic material. For example, the retaining member 55 is formed of aluminum or resin.

[0323] The retaining member 55, located at the center of the iron core 21, is made of a cylindrical component. A rotating shaft 16 is connected to the center of the retaining member 55. Furthermore, the retaining member 55 is provided between the plurality of protrusions 23 and between the first magnet 25 and the second magnet 26, thereby forming the magnetic field application part 20 into a cylindrical shape.

[0324] Other Implementation Methods

[0325] The above implementation method can also adopt the following structure.

[0326] In the above embodiment, the first magnet 25 and the second magnet 26 are arranged opposite to the magnetic working material 11, but this is not a limitation. The magnetic poles 24 of the magnetic field applying part 20 are arranged such that the magnetic poles 24 do not coincide with the magnetic working material 11 when viewed from a third direction.

[0327] For example, it can also be arranged such that, viewed from the second direction, the first magnet 25 and the second magnet 26 constituting the magnetic poles 24 are moved away from the magnetic working material 11 towards the outer side in the third direction. That is, the magnetic working material 11 can also be arranged in the magnetic gap between the magnetic poles 24 at a position that does not coincide with the magnetic working material 11 when viewed from the third direction.

[0328] In the above embodiment, a structure was described in which the magnetic yoke 13 is provided at both ends of the magnetic working material 11 in a third direction in order to uniformly apply a magnetic field to the magnetic working material 11, but this method is not limited to this. Since the magnetic permeability of the magnetic working material 11 is higher than that of a vacuum (air), it is also possible to configure the magnetic working material 11 without providing the magnetic yoke 13 at both ends in a third direction. Alternatively, it is also possible to configure the magnetic working material 11 with the magnetic yoke 13 at one end in a third direction and without providing the magnetic yoke 13 at the other end.

[0329] In the above embodiment, a method of using a permanent magnet to form the magnetic pole 24 of the magnetic field application part 20 is described, but an electromagnet may also be used, for example.

[0330] In the above embodiment, the number of magnetic poles 24 and the number of magnetic working materials 11 in the magnetic field application section 20 have been specifically described based on the accompanying drawings, but this method is not limited. The number of magnetic poles 24 and the number of magnetic working materials 11 in the magnetic field application section 20 can be appropriately selected.

[0331] In the above embodiment, a structure was described in which the magnetic field applying part 20 is rotated or linearly moved relative to the magnetic working material 11 in a first direction, but this is not limited to this method. It is also possible to configure the magnetic working material 11 to rotate or linearly move.

[0332] In the above embodiments, the shapes of the magnetic working material 11 and the magnetic yoke 13 have been specifically described based on the accompanying drawings, but are not limited to this method. As long as the magnetic working material 11 and the magnetic yoke 13 can be housed in the space between the magnetic poles 24, the shapes of the magnetic working material 11 and the magnetic yoke 13 can be arbitrary.

[0333] The embodiments and variations have been described above. However, it should be understood that various changes can be made to the methods and specific circumstances without departing from the spirit and scope of the claims. The embodiments and variations described above can also be appropriately combined or substituted, provided that the function of the object of this disclosure is not affected. The terms "first," "second," "third," etc., used in the specification and claims are only used to distinguish statements containing these terms and are not intended to limit the number or order of the statements.

[0334] -Industry Applicability-

[0335] In summary, this disclosure is useful for magnetic refrigeration devices and refrigeration devices.

[0336] - Symbol Explanation -

[0337] 1. Refrigeration unit

[0338] 2. Heat transfer medium circuit

[0339] 10 Magnetic Refrigeration Device

[0340] 11 magnetic working materials

[0341] 13 magnetic yoke

[0342] 20 Magnetic field application section

[0343] 24 magnetic poles

Claims

1. A magnetic refrigeration device, characterized in that: The magnetic refrigeration device includes a magnetic working medium (11) and a magnetic field application part (20). The magnetic field applying part (20) moves relative to the magnetic working material (11) along a first direction, and the magnetic field applying part (20) applies a magnetic field to the magnetic working material (11). The magnetic pole (24) of the magnetic field applying part (20) is arranged at one end of the magnetic working material (11) in a second direction orthogonal to the first direction when it is opposite to the magnetic pole (24), and is spaced apart in a third direction orthogonal to the first and second directions of the magnetic working material (11), and a magnetic field is applied to the magnetic working material (11) so that the magnetic flux flows along the third direction of the magnetic working material (11).

2. The magnetic refrigeration device according to claim 1, characterized in that: The relative movement is a relative rotational movement about a specified axis. The first direction is circumferential, the second direction is radial, and the third direction is axial. The magnetic pole (24) of the magnetic field application part (20) and the magnetic working material (11) that will have magnetic flux flowing between the magnetic pole (24) when it is opposite to the magnetic pole (24) are provided radially spaced apart. The magnetic poles (24) of the magnetic field applying part (20) are spaced apart axially.

3. The magnetic refrigeration device according to claim 1, characterized in that: The relative movement is a relative rotational movement about a specified axis. The first direction is circumferential, the second direction is axial, and the third direction is radial. The magnetic pole (24) of the magnetic field application part (20) and the magnetic working medium (11) that flows with magnetic flux between the magnetic pole (24) when opposite to the magnetic pole (24) are spaced apart axially. The magnetic poles (24) of the magnetic field applying part (20) are arranged radially spaced apart.

4. The magnetic refrigeration device according to claim 1, characterized in that: The relative movement is a linear movement along the first direction. The magnetic pole (24) of the magnetic field applying part (20) and the magnetic working material (11) that will have magnetic flux flowing between the magnetic pole (24) when it is opposite to the magnetic pole (24) are spaced apart in the second direction. The magnetic poles (24) of the magnetic field applying part (20) are spaced apart on the third side.

5. The magnetic refrigeration device according to any one of claims 1 to 4, characterized in that: At the two ends of the magnetic working material (11) located in the third direction, magnetic yokes (13) with higher permeability than the magnetic working material (11) are provided.

6. The magnetic refrigeration device according to any one of claims 1 to 4, characterized in that: The length of the face of the magnetic pole (24) of the magnetic field application part (20) opposite to the magnetic working material (11) in the first direction is greater than the length of the face of the magnetic working material (11) opposite to the magnetic pole (24) of the magnetic field application part (20) in the first direction.

7. The magnetic refrigeration device according to claim 5, characterized in that: The length of the face of the magnetic pole (24) of the magnetic field application part (20) opposite to the magnetic working material (11) in the first direction is greater than the length of the face of the magnetic working material (11) opposite to the magnetic pole (24) of the magnetic field application part (20) in the first direction.

8. A refrigeration device, characterized in that: The refrigeration device includes the magnetic refrigeration device (10) as described in any one of claims 1 to 7, and a heat medium circuit (2) that exchanges heat with the magnetic refrigeration device (10).

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