Magnetic refrigeration device and refrigeration device

Abstract

The magnetic field application unit (20) has a magnetic field generation unit (21), a first core (30), and a second core (40). The first core (30) is provided on one magnetic pole side of the magnetic field generation unit (21). The second core (40) is provided on the other magnetic pole side of the magnetic field generation unit (21). Between the first core (30) and the second core (40), three or more magnetic gaps are provided at second intervals that are twice or more than the first intervals in the first direction.

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 permanent magnets are housed in multiple storage sections, and a magnetic field is applied to a magnetic material from two poles (protruding portions), the two poles being located in the storage section closer to the material container than the permanent magnets.

[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 described in Patent Document 1, four permanent magnets are required to form the two poles. Therefore, if the number of poles is to be increased, the number of permanent magnets will also increase, leading to increased assembly time and component costs.

[0006] The purpose of this disclosure is to increase the number of poles while reducing the overall cost of the device.

[0007] - Technical solutions for solving technical problems -

[0008] The first aspect of this disclosure relates to a magnetic cooling device, which includes a plurality of magnetic working materials 11 and a magnetic field applying part 20. The plurality of magnetic working materials 11 are arranged with a predetermined first interval in a first direction. The magnetic field applying part 20 moves relative to the magnetic working materials 11 in the first direction and applies a magnetic field to the magnetic working materials 11. The magnetic field applying part 20 has a magnetic field generating part 21, a first iron core 30 and a second iron core 40. The first iron core 30 is disposed on one magnetic pole side of the magnetic field generating part 21, and the second iron core 40 is disposed on the other magnetic pole side of the magnetic field generating part 21. Between the first iron core 30 and the second iron core 40, three or more magnetic gaps are provided with a second interval in the first direction, which is more than twice the first interval.

[0009] In the first aspect, a plurality of magnetic working materials 11 are provided, spaced apart by a first interval in a first direction. A magnetic field applying unit 20 moves relative to the magnetic working materials 11 along the first direction. The magnetic field applying unit 20 includes a magnetic field generating unit 21, a first iron core 30, and a second iron core 40. The first iron core 30 is disposed on one pole side of the magnetic field generating unit 21. The second iron core 40 is disposed on the other pole side of the magnetic field generating unit 21. Between the first iron core 30 and the second iron core 40, three or more magnetic gaps are provided, spaced apart by a second interval in the first direction, where the second interval is more than twice the size of the first interval.

[0010] In this way, the number of poles can be increased without increasing the number of magnetic field generating units 21, enabling miniaturization of the device and reducing assembly time.

[0011] 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, and the first direction is circumferential.

[0012] In the second aspect, a magnetic refrigeration device is provided that allows the magnetic field application unit 20 to rotate relative to the magnetic working medium 11.

[0013] The third aspect of this disclosure is based on the magnetic cooling device of the second aspect, wherein the magnetic field generating part 21 is configured to generate a magnetic field along the axial direction, the first iron core 30 has a first protrusion 35 extending radially, the second iron core 40 has a second protrusion 45 extending radially and opposite to the first protrusion 35, and the magnetic gap is disposed between the first protrusion 35 and the second protrusion 45.

[0014] In the third aspect, it is possible to make the magnetic flux flow along the axial direction of the magnetic working medium 11.

[0015] The fourth aspect of this disclosure is based on the magnetic cooling device of the second aspect, wherein the magnetic field generating part 21 is configured to generate a magnetic field in a radial direction, the first iron core 30 has a first protrusion 35 extending radially, the second iron core 40 has a second protrusion 45 extending radially and opposite to the first protrusion 35, and the magnetic gap is disposed between the first protrusion 35 and the second protrusion 45.

[0016] In the fourth aspect, it is possible to make the magnetic flux flow along the axial direction of the magnetic working material 11.

[0017] The fifth aspect of this disclosure is based on the magnetic cooling device of the second aspect, wherein the magnetic field generating part 21 is configured to generate a magnetic field in the radial direction, the first iron core 30 has a first protrusion extending in the axial direction, the second iron core 40 has a second protrusion 45 extending in the axial direction and opposite to the first protrusion 35, and the magnetic gap is disposed between the first protrusion 35 and the second protrusion 45.

[0018] In the fifth aspect, it is possible to make the magnetic flux flow radially along the magnetic working material 11.

[0019] The sixth aspect of this disclosure is based on the magnetic cooling device of the second aspect, wherein the magnetic field generating part 21 is configured to generate a magnetic field along the axial direction, the first iron core 30 has a first protrusion 35 extending along the axial direction, the second iron core 40 has a second protrusion 45 extending along the axial direction and opposite to the first protrusion 35, and the magnetic gap is disposed between the first protrusion 35 and the second protrusion 45.

[0020] In the sixth aspect, it is possible to make the magnetic flux flow radially along the magnetic working material 11.

[0021] The seventh aspect of this disclosure is based on the magnetic cooling device of the second aspect, wherein the magnetic field generating part 21 is configured to generate a magnetic field along the axial direction, the first iron core 30 has a first protrusion 35 extending radially, the second iron core 40 has a second protrusion 45 extending axially and opposite to the first protrusion 35, and the magnetic gap is disposed between the first protrusion 35 and the second protrusion 45.

[0022] In the seventh aspect, it is possible to make the magnetic flux flow in the in-plane direction along the magnetic working material 11.

[0023] The eighth aspect of this disclosure is based on the magnetic refrigeration device of any one of the third to seventh aspects, wherein the magnetic working fluid 11 is arranged between the first protrusion 35 and the second protrusion 45 and is arranged at the position of minimum magnetic resistance.

[0024] In the eighth aspect, it is possible to reduce the leakage magnetic flux between the first protrusion 35 and the second protrusion 45.

[0025] The ninth aspect of this disclosure is based on the magnetic cooling device of any one of the third to seventh aspects, wherein the magnetic working fluid 11 is arranged at a position opposite to the top end of the first protrusion 35 and the top end of the second protrusion 45.

[0026] In the ninth aspect, the magnetic circuit length is shortened, thus enabling the overall device to be compact and increasing the magnetic flux density.

[0027] The tenth 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 ninth aspects, and a heat medium circuit 2 that exchanges heat with the magnetic refrigeration device 10.

[0028] In the tenth aspect, a refrigeration device including a magnetic refrigeration device 10 can be provided. Attached Figure Description

[0029] Figure 1 This is a piping system diagram of the refrigeration device according to the first embodiment;

[0030] Figure 2 This is a perspective view showing the structure of the magnetic refrigeration device;

[0031] Figure 3 This is an exploded perspective view showing the structure of the magnetic refrigeration device;

[0032] Figure 4 This is a top view showing the structure of the magnetic refrigeration device;

[0033] Figure 5 It is along Figure 4 The cross-sectional view seen by the A-A arrow;

[0034] Figure 6 This is a top view showing a modified example of the first embodiment;

[0035] Figure 7 It is along Figure 6 The sectional view seen by the B-B arrow;

[0036] Figure 8 This is a perspective view showing the structure of the magnetic refrigeration device according to the second embodiment;

[0037] Figure 9 This is an exploded perspective view showing the structure of the magnetic refrigeration device;

[0038] Figure 10 This is a top view showing the structure of the magnetic refrigeration device;

[0039] Figure 11 It is along Figure 10 The cross-sectional view seen by the C-C arrow;

[0040] Figure 12 This is a side sectional view showing a modified example of the second embodiment;

[0041] Figure 13 This is a top view showing the structure of the magnetic refrigeration device according to the third embodiment;

[0042] Figure 14 It is along Figure 13 The cross-sectional view seen by the D-D arrow;

[0043] Figure 15 This is a side sectional view showing a modified example of the third embodiment;

[0044] Figure 16 This is a top view showing the structure of the magnetic refrigeration device according to the fourth embodiment;

[0045] Figure 17 It is along Figure 16 The cross-sectional view seen by the E-E arrow;

[0046] Figure 18 This is a side sectional view showing a modified example of the fourth embodiment;

[0047] Figure 19 This is an exploded perspective view showing the structure of the magnetic refrigeration device according to the fifth embodiment;

[0048] Figure 20 This is a top view showing the structure of the magnetic refrigeration device;

[0049] Figure 21 It is along Figure 20 The cross-sectional view seen by the F-F arrow;

[0050] Figure 22 This is a side sectional view showing a modified example of the fifth embodiment;

[0051] Figure 23 This is an exploded perspective view showing the structure of the magnetic refrigeration device according to the sixth embodiment;

[0052] Figure 24 This is a top view showing the structure of the magnetic refrigeration device;

[0053] Figure 25 It is along Figure 24 The cross-sectional view seen by the G-G arrow;

[0054] Figure 26 This is a top view showing the structure of the magnetic refrigeration device according to the seventh embodiment;

[0055] Figure 27 It is along Figure 26 The cross-sectional view seen by the H-H arrow;

[0056] Figure 28 This is a top view showing the structure of the magnetic refrigeration device according to the eighth embodiment;

[0057] Figure 29 It is along Figure 28 The cross-sectional view seen by the I-I arrow;

[0058] Figure 30 This is a top view showing the structure of the magnetic refrigeration device according to the ninth embodiment;

[0059] Figure 31 It is along Figure 30 The cross-sectional view seen by the J-J arrow. Detailed Implementation

[0060] First Implementation Method

[0061] The first embodiment will now be described.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] <Low-temperature side heat exchanger and high-temperature side heat exchanger>

[0067] 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).

[0068] <pump>

[0069] 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 heat medium in the heat 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.

[0070] Pump 5 is a reciprocating piston pump. Pump 5 includes a pump housing 6 and a piston 7.

[0071] 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).

[0072] 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.

[0073] 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.

[0074] Control Department

[0075] 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.

[0076] <Magnetic Refrigeration Device>

[0077] like Figures 2-5 As shown, the magnetic refrigeration device 10 includes a magnetic working medium 11, a magnetic field application part 20, and a rotation mechanism 15.

[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 H y Mn(As) 0.9 Sb 0.1 )wait.

[0080] Multiple magnetic working materials 11 are arranged circumferentially at predetermined first intervals. Figure 3 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] 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.

[0082] 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.

[0083] The magnetic field applying part 20 has a permanent magnet 21 (magnetic field generating part), a first iron core 30, and a second iron core 40. The permanent magnet 21 is formed in a ring shape, for example. As the material of the permanent magnet 21, neodymium-iron-boron (Nd-Fe-B) magnets or samarium-cobalt (SmCo) magnets can be used, for example.

[0084] The first iron core 30 and the second iron core 40 are formed of magnetic material. The first iron core 30 is disposed on one pole side of the permanent magnet 21. The second iron core 40 is disposed on the other pole side of the permanent magnet 21. The first iron core 30 and the second iron core 40 are spaced apart axially. A rotating shaft 16 is connected to the center of the first iron core 30 and the second iron core 40.

[0085] Here, in order to prevent the first iron core 30 and the second iron core 40 from short-circuiting via the rotating shaft 16, it is preferable that the rotating shaft 16 is made of a non-magnetic material. Alternatively, a non-magnetic material (not shown) may be sandwiched between the first iron core 30 and the second iron core 40 and the rotating shaft 16 made of a magnetic material.

[0086] exist Figure 5 In the example shown, the permanent magnet 21 is magnetized along the axial direction. The permanent magnet 21 is arranged such that: on the side of the first iron core 30 ( Figure 5 The upper side of the middle core is the N pole, and the second iron core 40 side ( Figure 5 The lower 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 21 can also be reversed.

[0087] The first iron core 30 has a first disc portion 31 and a first protrusion 35. A rotating shaft 16 is connected to the first disc portion 31. The first protrusion 35 extends radially outward from the first disc portion 31. Multiple first protrusions 35 are arranged circumferentially at predetermined second intervals. Figure 4 In the example shown, four first protrusions 35 are arranged at equal intervals in the circumferential direction. The first protrusions 35 are arranged to be axially separated from the magnetic working material 11. The second spacing of the first iron core 30 is more than twice the first spacing of the magnetic working material 11.

[0088] The second iron core 40 has a second disc portion 41 and a second protrusion 45. A rotating shaft 16 is connected to the second disc portion 41. The second protrusion 45 extends radially outward from the second disc portion 41. Multiple second protrusions 45 are arranged circumferentially at predetermined second intervals. Figure 4 In the example shown, four second protrusions 45 are arranged at equal intervals in the circumferential direction. The second protrusions 45 are arranged to be axially separated from the magnetic working material 11. The second spacing of the second core 40 is more than twice the first spacing of the magnetic working material 11.

[0089] Viewed axially, the first iron core 30 and the second iron core 40 are formed with the same shape. The first protrusion 35 and the second protrusion 45 are axially opposite each other. The first protrusion 35 and the second protrusion 45 constitute the magnetic poles 25 of the magnetic field applying part 20. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45. Figure 4 In the example shown, four magnetic gaps are provided. The four magnetic gaps are arranged to apply magnetic fields to different magnetic working materials 11. The magnetic working material 11 is arranged between the first protrusion 35 and the second protrusion 45.

[0090] When the first protrusion 35 and the second protrusion 45 are axially aligned with 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.

[0091] In the magnetic cooling device 10, magnetic flux flows from the permanent magnet 21 toward the first protrusion 35 of the first iron core 30. The magnetic flux flows axially within the magnetic working material 11 in a manner from the first protrusion 35 to the second protrusion 45. Magnetic flux flows from the second protrusion 45 of the second iron core 40 toward the permanent magnet 21. As a result, the magnetic working material 11, to which a magnetic field is applied, heats up.

[0092] Then, the magnetic field applying part 20 is rotated and moved so that the first protrusion 35 and the second protrusion 45 are axially aligned with 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.

[0093] - Operation of the refrigeration unit -

[0094] 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.

[0095] <Heating action>

[0096] 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.

[0097] 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.

[0098] <Cooling Action>

[0099] 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.

[0100] 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 out into the low-temperature side flow path 2a and flows 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.

[0101] -Effects of the first implementation method-

[0102] According to the features of this embodiment, a plurality of magnetic working materials 11 are provided with a first interval spaced apart in a first direction. The magnetic field applying part 20 moves relative to the magnetic working materials 11 in the first direction. The magnetic field applying part 20 has a magnetic field generating part 21, a first iron core 30, and a second iron core 40. The first iron core 30 is provided on one magnetic pole side of the magnetic field generating part 21. The second iron core 40 is provided on the other magnetic pole side of the magnetic field generating part 21. Between the first iron core 30 and the second iron core 40, three or more magnetic gaps are provided with a second interval spaced apart in the first direction, the second interval being more than twice the size of the first interval.

[0103] In this way, the number of poles can be increased without increasing the number of permanent magnets 21 that serve as magnetic field generating units 21, thereby enabling miniaturization of the device and reducing assembly time.

[0104] According to the features of this embodiment, the relative movement is a relative rotational movement about a predetermined axis, and the first direction is the circumferential direction.

[0105] In this way, a magnetic refrigeration device can be provided that allows the magnetic field application unit 20 to rotate relative to the magnetic working medium 11.

[0106] According to the features of this embodiment, the magnetic field generating section 21 is configured to generate a magnetic field along the axial direction. The first iron core 30 has a first protrusion 35 extending radially. The second iron core 40 has a second protrusion 45 extending radially and opposite to the first protrusion 35. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45.

[0107] In this way, the magnetic flux can flow along the axial direction of the magnetic working material 11.

[0108] According to the features of this embodiment, the magnetic working material 11 is arranged between the first protrusion 35 and the second protrusion 45 and is arranged at the position of minimum magnetic resistance.

[0109] This reduces the magnetic flux leakage between the first protrusion 35 and the second protrusion 45.

[0110] 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.

[0111] In this way, a refrigeration device 1 including a magnetic refrigeration device 10 can be provided.

[0112] - Variations of the first embodiment -

[0113] In the first embodiment, the permanent magnet 21 can also be magnetized radially.

[0114] like Figure 6 and Figure 7As shown, multiple magnetic working materials 11 are arranged circumferentially at predetermined first intervals. Figure 6 In the example shown, sixteen magnetic working materials 11 are arranged at equal intervals in the circumferential direction.

[0115] The magnetic field application part 20 has a permanent magnet 21, a first iron core 30, and a second iron core 40. The permanent magnet 21 is formed in a ring shape, for example.

[0116] The first iron core 30 has a first disc portion 31, a first cylindrical portion 32, and a first protrusion 35. A rotating shaft 16 is connected to the first cylindrical portion 32. The first disc portion 31 is disposed on the first cylindrical portion 32. Figure 7 The upper end of the disk. A first protrusion 35 extends radially outward from the first disk portion 31. A plurality of first protrusions 35 are arranged at predetermined second intervals in the circumferential direction.

[0117] exist Figure 6 In the example shown, eight first protrusions 35 are arranged at equal intervals in the circumferential direction. The first protrusions 35 are arranged to be axially separated from the magnetic working material 11. The second spacing of the first iron core 30 is more than twice the first spacing of the magnetic working material 11.

[0118] The second core 40 has a second cylindrical portion 42 and a second protrusion 45. The inner diameter of the second cylindrical portion 42 is larger than the outer diameter of the first cylindrical portion 32. The first cylindrical portion 32 is arranged inside the second cylindrical portion 42. A permanent magnet 21 is sandwiched between the first cylindrical portion 32 and the second cylindrical portion 42.

[0119] The second protrusion 45 extends from the second cylindrical portion 42. Figure 7 The lower end of the middle part extends radially outward. Multiple second protrusions 45 are arranged circumferentially at predetermined second intervals. Figure 6 In the example shown, eight second protrusions 45 are arranged at equal intervals in the circumferential direction. The second protrusions 45 are arranged to be axially separated from the magnetic working material 11. The second spacing of the second core 40 is more than twice the second spacing of the magnetic working material 11.

[0120] exist Figure 7 In the example shown, the permanent magnet 21 is magnetized radially. The permanent magnet 21 is arranged such that: on the side of the first iron core 30 ( Figure 7 The inner radial side of the core is the N pole, and the second core 40 side is the N pole. Figure 7 The 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 21 can also be reversed.

[0121] The first protrusion 35 and the second protrusion 45 are axially opposite each other. The first protrusion 35 and the second protrusion 45 constitute the magnetic poles 25 of the magnetic field applying part 20. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45. Figure 6 In the example shown, eight magnetic gaps are provided. A magnetic working material 11 is arranged between the first protrusion 35 and the second protrusion 45.

[0122] When the first protrusion 35 and the second protrusion 45 are axially aligned with 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.

[0123] In the magnetic cooling device 10, magnetic flux flows from the permanent magnet 21 toward the first protrusion 35 of the first iron core 30. The magnetic flux flows axially within the magnetic working material 11 in a manner from the first protrusion 35 to the second protrusion 45. Magnetic flux flows from the second protrusion 45 of the second iron core 40 toward the permanent magnet 21. As a result, the magnetic working material 11, to which a magnetic field is applied, heats up. At this time, even if the rotating shaft 16 is a magnetic material, magnetic flux leakage from the permanent magnet 21 will not occur.

[0124] Second Implementation Method

[0125] The second embodiment will be described.

[0126] like Figures 8-11 As shown, multiple magnetic working materials 11 are arranged circumferentially at predetermined first intervals. Figure 10 In the example shown, eight magnetic working materials 11 extending in an arc along the circumference are arranged at equal intervals along the circumference.

[0127] The magnetic field application part 20 has a permanent magnet 21, a first iron core 30, and a second iron core 40. The permanent magnet 21 is formed in a ring shape, for example.

[0128] The first iron core 30 has a first ring portion 33 and a first protrusion 35. The first protrusion 35 extends from the base end to the top end by starting from the first ring portion 33. Figure 11 The upper surface of the ring is formed by extending axially (upward) and then radially inward. Multiple first protrusions 35 are provided circumferentially at predetermined second intervals from the first ring portion 33. Figure 10 In the example shown, four first protrusions 35 are arranged at equal intervals in the circumferential direction. The first protrusions 35 are arranged to be radially separated from the magnetic working material 11.

[0129] The second iron core 40 has a second ring portion 43 and a second protrusion 45. The outer diameter of the second ring portion 43 is smaller than the inner diameter of the first ring portion 33. The second ring portion 43 is arranged inside the first ring portion 33. A permanent magnet 21 is sandwiched between the first ring portion 33 and the second ring portion 43.

[0130] The second protrusion 45 extends from the base to the tip by starting from the second ring 43. Figure 11The upper surface of the ring is formed by extending axially (upward) and then radially outward. Multiple second protrusions 45 are provided circumferentially at predetermined second intervals on the second ring portion 43. Figure 10 In the example shown, four second protrusions 45 are arranged at equal intervals in the circumferential direction. The second protrusions 45 are arranged to be radially separated from the magnetic working material 11.

[0131] exist Figure 11 In the example shown, the permanent magnet 21 is magnetized radially. The permanent magnet 21 is arranged such that: on the side of the first iron core 30 ( Figure 11 The radial outer side of the core is the N pole, and the second core 40 side ( Figure 11 The inner radial side 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 21 can also be reversed.

[0132] The top ends of the first protrusion 35 and the second protrusion 45 are radially opposite each other. The first protrusion 35 and the second protrusion 45 constitute the magnetic poles 25 of the magnetic field applying part 20. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45. Figure 10 In the example shown, four magnetic gaps are provided. A magnetic working material 11 is arranged between the first protrusion 35 and the second protrusion 45.

[0133] When the first protrusion 35 and the second protrusion 45 are radially opposite to 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.

[0134] In the magnetic cooling device 10, magnetic flux flows from the permanent magnet 21 toward the first protrusion 35 of the first iron core 30. The magnetic flux flows radially within the magnetic working material 11 in a manner from the first protrusion 35 to the second protrusion 45. Magnetic flux flows from the second protrusion 45 of the second iron core 40 toward the permanent magnet 21. As a result, the magnetic working material 11, to which a magnetic field is applied, heats up.

[0135] -Effects of the second implementation method-

[0136] According to the features of this embodiment, the magnetic field generating section 21 is configured to generate a magnetic field radially. The first iron core 30 has a first protrusion 35 extending radially. The second iron core 40 has a second protrusion 45 extending radially and opposite to the first protrusion 35. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45, where the magnetic reluctance is smaller than at other locations.

[0137] In this way, the magnetic flux can flow along the axial direction of the magnetic working material 11.

[0138] -Modifications of the Second Embodiment-

[0139] In the second embodiment, the top end of the first protrusion 35 and the top end of the second protrusion 45 may extend axially.

[0140] like Figure 12 As shown, the first iron core 30 has a first ring portion 33 and a first protrusion 35. The first protrusion 35 extends from the first ring portion 33. Figure 12 The upper surface of the first ring 33 extends axially (upward). Multiple first protrusions 35 are provided at predetermined second intervals in the circumferential direction of the first ring 33.

[0141] The second iron core 40 has a second ring portion 43 and a second protrusion 45. The outer diameter of the second ring portion 43 is smaller than the inner diameter of the first ring portion 33. The second ring portion 43 is arranged inside the first ring portion 33. A permanent magnet 21 is sandwiched between the first ring portion 33 and the second ring portion 43.

[0142] The second protrusion 45 extends from the second ring 43. Figure 12 The upper surface of the ring extends axially (upward). Multiple second protrusions 45 are provided circumferentially at predetermined second intervals on the second ring portion 43.

[0143] exist Figure 12 In the example shown, the permanent magnet 21 is magnetized radially. The permanent magnet 21 is arranged such that: on the side of the first iron core 30 ( Figure 12 The radial outer side of the core is the N pole, and the second core 40 side ( Figure 12 The inner radial side 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 21 can also be reversed.

[0144] The top ends of the first iron core 30 and the second iron core 40 are radially opposite each other. The first protrusion 35 and the second protrusion 45 constitute the magnetic poles 25 of the magnetic field applying part 20. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45. A magnetic working material 11 is arranged between the first protrusion 35 and the second protrusion 45.

[0145] When the first protrusion 35 and the second protrusion 45 are radially opposite to 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.

[0146] In the magnetic cooling device 10, magnetic flux flows from the permanent magnet 21 toward the first protrusion 35 of the first iron core 30. The magnetic flux flows radially within the magnetic working material 11 in a manner from the first protrusion 35 to the second protrusion 45. Magnetic flux flows from the second protrusion 45 of the second iron core 40 toward the permanent magnet 21. As a result, the magnetic working material 11, to which a magnetic field is applied, heats up.

[0147] - Effects of variations of the second embodiment -

[0148] According to the features of this embodiment, the magnetic field generating unit 21 is configured to generate a magnetic field radially. The first iron core 30 has a first protrusion 35 extending axially. The second iron core 40 has a second protrusion 45 extending axially and opposite to the first protrusion 35. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45.

[0149] This allows the magnetic flux to flow radially along the magnetic working material 11.

[0150] Third Implementation Method

[0151] The third embodiment will be described.

[0152] like Figure 13 and Figure 14 As shown, multiple magnetic working materials 11 are arranged circumferentially at predetermined first intervals. Figure 13 In the example shown, sixteen magnetic working materials 11, which extend in an arc along the circumference, are arranged at equal intervals along the circumference.

[0153] The magnetic field application part 20 has a permanent magnet 21, a first iron core 30, and a second iron core 40. The permanent magnet 21 is formed in a cylindrical shape, for example.

[0154] The first iron core 30 has a first disc portion 31 and a first protrusion 35. A rotating shaft 16 is connected to the first disc portion 31. The first protrusion 35 extends radially outward from the first disc portion 31 and then axially (towards) the top portion. Figure 14 It is formed by extending downwards (in the middle). Multiple first protrusions 35 are arranged circumferentially at predetermined second intervals. Figure 13 In the example shown, eight first protrusions 35 are arranged at equal intervals in the circumferential direction.

[0155] The second iron core 40 has a second disc portion 41 and a second protrusion 45. A rotating shaft 16 is connected to the second disc portion 41. A permanent magnet 21 is sandwiched between the first disc portion 31 and the second disc portion 41.

[0156] The second protrusion 45 extends radially outward from the base end to the top end, starting from the second disc portion 41 and then axially (towards) Figure 14 It is formed by extending from the upper part of the middle. Multiple second protrusions 45 are arranged circumferentially at predetermined second intervals. Figure 13 In the example shown, eight second protrusions 45 are arranged at equal intervals in the circumferential direction.

[0157] exist Figure 14 In the example shown, the permanent magnet 21 is magnetized along the axial direction. The permanent magnet 21 is arranged such that: on the side of the first iron core 30 ( Figure 14The upper side of the middle core is the N pole, and the second iron core 40 side ( Figure 14 The lower 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 21 can also be reversed.

[0158] The top ends of the first protrusion 35 and the second protrusion 45 are radially opposite each other. The first protrusion 35 and the second protrusion 45 constitute the magnetic poles 25 of the magnetic field applying part 20. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45. Figure 13 In the example shown, eight magnetic gaps are provided. A magnetic working material 11 is arranged between the first protrusion 35 and the second protrusion 45.

[0159] When the first protrusion 35 and the second protrusion 45 are radially opposite to 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.

[0160] In the magnetic cooling device 10, magnetic flux flows from the permanent magnet 21 toward the first protrusion 35 of the first iron core 30. The magnetic flux flows radially within the magnetic working material 11 in a manner from the first protrusion 35 to the second protrusion 45. Magnetic flux flows from the second protrusion 45 of the second iron core 40 toward the permanent magnet 21. As a result, the magnetic working material 11, to which a magnetic field is applied, heats up.

[0161] -Effects of the third implementation method-

[0162] According to the features of this embodiment, the magnetic field generating unit 21 is configured to generate a magnetic field along the axial direction. The first iron core 30 has a first protrusion 35 extending along the axial direction. The second iron core 40 has a second protrusion 45 extending along the axial direction and opposite to the first protrusion 35. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45.

[0163] This allows the magnetic flux to flow radially along the magnetic working material 11.

[0164] -Modifications of the Third Embodiment-

[0165] In the third embodiment, the permanent magnet 21 can also be magnetized radially.

[0166] like Figure 15 As shown, the first iron core 30 has a first disc portion 31, a first cylindrical portion 32, and a first protrusion 35. A rotating shaft 16 is connected to the first cylindrical portion 32. The first disc portion 31 is provided in the first cylindrical portion 32. Figure 15 The upper part of the middle.

[0167] The first protrusion 35 extends radially outward from the base end to the top end, starting from the first disc portion 31 and then axially (towards) Figure 15It is formed by extending from below. A plurality of first protrusions 35 are arranged circumferentially at predetermined second intervals. The first protrusions 35 are arranged to be radially separated from the magnetic working material 11.

[0168] The second iron core 40 has a second disc portion 41, a second cylindrical portion 42, and a second protrusion 45. The inner diameter of the second cylindrical portion 42 is larger than the outer diameter of the first cylindrical portion 32. The first cylindrical portion 32 is arranged inside the second cylindrical portion 42. A permanent magnet 21 is sandwiched between the first cylindrical portion 32 and the second cylindrical portion 42.

[0169] The second protrusion 45 extends from the base end to the tip end, starting from the second cylindrical portion 42. Figure 15 From the lower end of the middle, it extends radially outward and then axially (towards) Figure 15 It is formed by extending from the upper part of the middle part. A plurality of second protrusions 45 are arranged at predetermined second intervals in the circumferential direction. The second protrusions 45 are arranged to be separated from the magnetic working material 11 in the axial direction.

[0170] exist Figure 15 In the example shown, the permanent magnet 21 is magnetized radially. The permanent magnet 21 is arranged such that: on the side of the first iron core 30 ( Figure 15 The inner radial side of the core is the N pole, and the second core 40 side is the N pole. Figure 15 The 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 21 can also be reversed.

[0171] The top ends of the first protrusion 35 and the second protrusion 45 are radially opposite each other. The first protrusion 35 and the second protrusion 45 constitute the magnetic poles 25 of the magnetic field applying part 20. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45. A magnetic working material 11 is arranged between the first protrusion 35 and the second protrusion 45.

[0172] When the first protrusion 35 and the second protrusion 45 are radially opposite to 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.

[0173] In the magnetic cooling device 10, magnetic flux flows from the permanent magnet 21 toward the first protrusion 35 of the first iron core 30. The magnetic flux flows radially within the magnetic working material 11 in a manner from the first protrusion 35 to the second protrusion 45. Magnetic flux flows from the second protrusion 45 of the second iron core 40 toward the permanent magnet 21. As a result, the magnetic working material 11, to which a magnetic field is applied, heats up.

[0174] Fourth Implementation Method

[0175] The fourth embodiment will be described.

[0176] like Figure 16 and Figure 17 As shown, multiple magnetic working materials 11 are arranged circumferentially at predetermined first intervals. Figure 16 In the example shown, sixteen magnetic working materials 11, which extend in an arc along the circumference, are arranged at equal intervals along the circumference.

[0177] The magnetic field application part 20 has a permanent magnet 21, a first iron core 30, and a second iron core 40. The permanent magnet 21 is formed in a ring shape, for example.

[0178] The first iron core 30 has a first disc portion 31 and a first protrusion 35. The first protrusion 35 extends radially outward from the first disc portion 31. Multiple first protrusions 35 are provided at predetermined second intervals in the circumferential direction. Figure 16 In the example shown, eight first protrusions 35 are arranged at equal intervals in the circumferential direction. The first protrusions 35 are arranged to be separated from the magnetic working material 11 on the radially inner side.

[0179] The second core 40 has a second disc portion 41 and a second protrusion 45. The second protrusion 45 extends radially outward from the second disc portion 41. A plurality of second protrusions 45 are provided at predetermined second intervals in the circumferential direction. Figure 16 In the example shown, eight second protrusions 45 are arranged at equal intervals in the circumferential direction. The second protrusions 45 are arranged to be separated from the magnetic working material 11 on the radially inner side. A permanent magnet 21 is sandwiched between the first disk portion 31 and the second disk portion 41.

[0180] exist Figure 17 In the example shown, the permanent magnet 21 is magnetized along the axial direction. The permanent magnet 21 is arranged such that: on the side of the first iron core 30 ( Figure 17 The upper side of the middle core is the N pole, and the second iron core 40 side ( Figure 17 The lower 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 21 can also be reversed.

[0181] The top ends of the first protrusion 35 and the second protrusion 45 are axially opposite each other. The first protrusion 35 and the second protrusion 45 constitute the magnetic poles 25 of the magnetic field applying part 20. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45. Figure 16 In the example shown, eight magnetic gaps are provided. The magnetic working material 11 is arranged radially outward from the first protrusion 35 and the second protrusion 45.

[0182] When the first protrusion 35 and the second protrusion 45 are radially opposite to 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.

[0183] In the magnetic cooling device 10, magnetic flux flows from the permanent magnet 21 toward the first protrusion 35 of the first iron core 30. The magnetic flux flows axially within the magnetic working material 11 in a manner from the first protrusion 35 to the second protrusion 45. Magnetic flux flows from the second protrusion 45 of the second iron core 40 toward the permanent magnet 21. As a result, the magnetic working material 11, to which a magnetic field is applied, heats up.

[0184] -Effects of the Fourth Implementation -

[0185] According to the features of this embodiment, the magnetic working material 11 is arranged at a position opposite to the top end of the first protrusion 35 and the top end of the second protrusion 45.

[0186] This shortens the magnetic circuit length, allowing for a more compact overall device and increased magnetic flux density. Furthermore, since the magnetic working fluid 11 is not surrounded by the first protrusion 35 and the second protrusion 45, the entry and exit of the thermal medium into and out of the magnetic working fluid 11 becomes easier.

[0187] - Variations of the fourth embodiment -

[0188] In the fourth embodiment, the permanent magnet 21 can also be magnetized radially.

[0189] like Figure 18 As shown, the first iron core 30 has a first disc portion 31, a first cylindrical portion 32, and a first protrusion 35. A rotating shaft 16 is connected to the first cylindrical portion 32. The first disc portion 31 is provided in the first cylindrical portion 32. Figure 18 The upper end of the disk. A first protrusion 35 extends radially outward from the first disk portion 31. A plurality of first protrusions 35 are arranged at predetermined second intervals in the circumferential direction. The first protrusions 35 are arranged to be separated from the magnetic working material 11 on the radially inward side.

[0190] The second core 40 has a second cylindrical portion 42 and a second protrusion 45. The inner diameter of the second cylindrical portion 42 is larger than the outer diameter of the first cylindrical portion 32. The first cylindrical portion 32 is arranged inside the second cylindrical portion 42. A permanent magnet 21 is sandwiched between the first cylindrical portion 32 and the second cylindrical portion 42.

[0191] The second protrusion 45 extends from the second cylindrical portion 42. Figure 18 The lower end of the middle part extends radially outward. Multiple second protrusions 45 are arranged circumferentially at predetermined second intervals. The second protrusions 45 are arranged radially inward to separate from the magnetic working material 11.

[0192] exist Figure 18 In the example shown, the permanent magnet 21 is magnetized radially. The permanent magnet 21 is arranged such that: on the side of the first iron core 30 ( Figure 18 The inner radial side of the core is the N pole, and the second core 40 side is the N pole. Figure 18The 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 21 can also be reversed.

[0193] The top ends of the first protrusion 35 and the second protrusion 45 are axially opposite each other. The first protrusion 35 and the second protrusion 45 constitute the magnetic poles 25 of the magnetic field applying part 20. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45. The magnetic working material 11 is arranged radially outward from the first protrusion 35 and the second protrusion 45.

[0194] When the first protrusion 35 and the second protrusion 45 are radially opposite to 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.

[0195] In the magnetic cooling device 10, magnetic flux flows from the permanent magnet 21 toward the first protrusion 35 of the first iron core 30. The magnetic flux flows axially within the magnetic working material 11 in a manner from the first protrusion 35 to the second protrusion 45. Magnetic flux flows from the second protrusion 45 of the second iron core 40 toward the permanent magnet 21. As a result, the magnetic working material 11, to which a magnetic field is applied, heats up.

[0196] Fifth Implementation Method

[0197] The fifth embodiment will be described.

[0198] like Figures 19-21 As shown, multiple magnetic working materials 11 are arranged at intervals in the circumferential direction. Figure 20 In the example shown, sixteen magnetic working materials 11, which extend in an arc along the circumference, are arranged at equal intervals along the circumference.

[0199] The magnetic field application part 20 has a permanent magnet 21, a first iron core 30, and a second iron core 40. The permanent magnet 21 is formed in a ring shape, for example.

[0200] The first iron core 30 has a first disc portion 31 and a first protrusion 35. The first protrusion 35 extends radially outward from the first disc portion 31 and then axially (towards) the top portion. Figure 21 It is formed by extending from below (in the middle). The first protrusion 35 is provided with a plurality of protrusions spaced at predetermined second intervals in the circumferential direction. Figure 20 In the example shown, eight first protrusions 35 are arranged in a circumferential direction in groups of two with equal intervals between each group. The first protrusions 35 are arranged to be separated from the magnetic working material 11 on the radially inner side.

[0201] The second iron core 40 has a second disc portion 41 and a second protrusion 45. The second protrusion 45 extends radially outward from the second disc portion 41 and then axially from the base end to the top end. Figure 21 It is formed by extending from the upper part of the middle section. Multiple second protrusions 45 are provided circumferentially at predetermined second intervals. Figure 20 In the example shown, eight second protrusions 45 are arranged in a circumferential direction in groups of two with equal intervals between each group. The second protrusions 45 are arranged to be separated from the magnetic working material 11 on the radially inner side. A permanent magnet 21 is sandwiched between the first disk portion 31 and the second disk portion 41.

[0202] exist Figure 21 In the example shown, the permanent magnet 21 is magnetized along the axial direction. The permanent magnet 21 is arranged such that: on the side of the first iron core 30 ( Figure 21 The upper side of the middle core is the N pole, and the second iron core 40 side ( Figure 21 The lower 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 21 can also be reversed.

[0203] The top ends of the first protrusion 35 and the second protrusion 45 are circumferentially opposite each other. The first protrusion 35 and the second protrusion 45 constitute the magnetic poles 25 of the magnetic field applying part 20. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45. Figure 20 In the example shown, eight magnetic gaps are provided. The magnetic working material 11 is arranged radially outward from the first protrusion 35 and the second protrusion 45.

[0204] When the first protrusion 35 and the second protrusion 45 are radially opposite to the magnetic working material 11, the magnetic flux flows circumferentially along the magnetic working material 11. It should be noted that the direction of magnetic flux flow is indicated by dashed arrows.

[0205] In the magnetic cooling device 10, magnetic flux flows from the permanent magnet 21 toward the first protrusion 35 of the first iron core 30. The magnetic flux flows circumferentially within the magnetic working material 11 in a manner from the first protrusion 35 to the second protrusion 45. Magnetic flux flows from the second protrusion 45 of the second iron core 40 toward the permanent magnet 21. As a result, the magnetic working material 11, to which a magnetic field is applied, heats up.

[0206] -Modifications of the fifth embodiment-

[0207] In the fifth embodiment, the permanent magnet 21 may also be magnetized radially.

[0208] like Figure 22 As shown, the first iron core 30 has a first disc portion 31, a first cylindrical portion 32, and a first protrusion 35. A rotating shaft 16 is connected to the first cylindrical portion 32. The first disc portion 31 is provided in the first cylindrical portion 32. Figure 22 The upper end of the middle. The first protrusion 35 extends from the base end to the top end in a radially outward direction starting from the first disc portion 31 and then along the axial direction (towards). Figure 22It is formed by extending from below. A plurality of first protrusions 35 are arranged circumferentially at predetermined second intervals. The first protrusions 35 are arranged to be separated from the magnetic working material 11 on the radially inner side.

[0209] The second core 40 has a second cylindrical portion 42 and a second protrusion 45. The inner diameter of the second cylindrical portion 42 is larger than the outer diameter of the first cylindrical portion 32. The first cylindrical portion 32 is arranged inside the second cylindrical portion 42. A permanent magnet 21 is sandwiched between the first cylindrical portion 32 and the second cylindrical portion 42.

[0210] The second protrusion 45 extends from the base end to the tip end, preceding the second cylindrical portion 42. Figure 22 The lower end of the middle extends radially outward and then along the axial direction (towards) Figure 22 It is formed by extending from the upper part of the middle part. A plurality of second protrusions 45 are arranged at predetermined second intervals in the circumferential direction. The second protrusions 45 are arranged to be separated from the magnetic working material 11 on the radially inner side.

[0211] exist Figure 22 In the example shown, the permanent magnet 21 is magnetized radially. The permanent magnet 21 is arranged such that: on the side of the first iron core 30 ( Figure 22 The inner radial side of the core is the N pole, and the second core 40 side is the N pole. Figure 22 The 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 21 can also be reversed.

[0212] The top ends of the first protrusion 35 and the second protrusion 45 are circumferentially opposite each other. The first protrusion 35 and the second protrusion 45 constitute the magnetic poles 25 of the magnetic field applying part 20. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45. The magnetic working material 11 is arranged at a position radially outward from the first protrusion 35 and the second protrusion 45.

[0213] When the first protrusion 35 and the second protrusion 45 are radially opposite to the magnetic working material 11, the magnetic flux flows circumferentially along the magnetic working material 11. It should be noted that the direction of magnetic flux flow is indicated by dashed arrows.

[0214] In the magnetic cooling device 10, magnetic flux flows from the permanent magnet 21 toward the first protrusion 35 of the first iron core 30. The magnetic flux flows circumferentially within the magnetic working material 11 in a manner from the first protrusion 35 to the second protrusion 45. Magnetic flux flows from the second protrusion 45 of the second iron core 40 toward the permanent magnet 21. As a result, the magnetic working material 11, to which a magnetic field is applied, heats up.

[0215] The Sixth Implementation Method

[0216] The sixth embodiment will be described.

[0217] like Figures 23-25 As shown, multiple magnetic working materials 11 are arranged at intervals in the circumferential direction. Figure 24 In the example shown, sixteen magnetic working materials 11, which extend in an arc along the circumference, are arranged at equal intervals along the circumference.

[0218] The magnetic field application part 20 has a permanent magnet 21, a first iron core 30, and a second iron core 40. The permanent magnet 21 is formed in a ring shape, for example.

[0219] The first iron core 30 has a first disc portion 31 and a first protrusion 35. The first protrusion 35 extends radially outward from the first disc portion 31. Multiple first protrusions 35 are provided at predetermined second intervals in the circumferential direction. Figure 24 In the example shown, eight first protrusions 35 are arranged in a circumferential direction in groups of two with equal intervals between each group. The first protrusions 35 are arranged to be axially separated from the magnetic working material 11.

[0220] The second iron core 40 has a second disc portion 41 and a second protrusion 45. The second protrusion 45 extends radially outward from the second disc portion 41 and then axially from the base end to the top end. Figure 24 It is formed by extending from the upper part of the middle section. Multiple second protrusions 45 are provided circumferentially at predetermined second intervals. Figure 24 In the example shown, eight second protrusions 45 are arranged in a circumferential direction in groups of two with equal intervals between each group. The second protrusions 45 are arranged to be axially separated from the magnetic working material 11. A permanent magnet 21 is sandwiched between the first disk portion 31 and the second disk portion 41.

[0221] exist Figure 25 In the example shown, the permanent magnet 21 is magnetized along the axial direction. The permanent magnet 21 is arranged such that: on the side of the first iron core 30 ( Figure 25 The upper side of the middle core is the N pole, and the second iron core 40 side ( Figure 25 The lower 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 21 can also be reversed.

[0222] The top ends of the first protrusion 35 and the second protrusion 45 are circumferentially opposite each other. The first protrusion 35 and the second protrusion 45 constitute the magnetic poles 25 of the magnetic field applying part 20. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45. Figure 24 In the example shown, eight magnetic gaps are provided. The magnetic working material 11 is arranged to be axially separated from the first protrusion 35 and the second protrusion 45.

[0223] When the first protrusion 35 and the second protrusion 45 are axially aligned with the magnetic working material 11, the magnetic flux flows circumferentially along the magnetic working material 11. It should be noted that the direction of magnetic flux flow is indicated by dashed arrows.

[0224] In the magnetic cooling device 10, magnetic flux flows from the permanent magnet 21 toward the first protrusion 35 of the first iron core 30. The magnetic flux flows circumferentially within the magnetic working material 11 in a manner from the first protrusion 35 to the second protrusion 45. Magnetic flux flows from the second protrusion 45 of the second iron core 40 toward the permanent magnet 21. As a result, the magnetic working material 11, to which a magnetic field is applied, heats up.

[0225] -Effects of the Sixth Implementation Method-

[0226] According to the features of this embodiment, the magnetic field generating section 21 is configured to generate a magnetic field along the axial direction. The first iron core 30 has a first protrusion 35 extending radially. The second iron core 40 has a second protrusion 45 extending axially and opposite to the first protrusion 35. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45.

[0227] In this way, the magnetic flux can flow in the in-plane direction of the magnetic working material 11.

[0228] The Seventh Implementation Method

[0229] The seventh embodiment will be described.

[0230] like Figure 26 and Figure 27 As shown, multiple magnetic working materials 11 are arranged at intervals in the circumferential direction. Figure 26 In the example shown, sixteen magnetic working materials 11, which extend in an arc along the circumference, are arranged at equal intervals along the circumference.

[0231] The magnetic field application part 20 has a permanent magnet 21, a first iron core 30, and a second iron core 40. The permanent magnet 21 is formed in a ring shape, for example.

[0232] The first iron core 30 has a first cylindrical portion 32 and a first protrusion 35. The first protrusion 35 extends from the base end to the top end, starting from the first cylindrical portion 32. Figure 26 It is formed by extending axially (upward) from the upper end and then radially outward. Multiple first protrusions 35 are provided at predetermined second intervals in the circumferential direction. Figure 26 In the example shown, eight first protrusions 35 are arranged in a circumferential direction in groups of two with equal intervals between each group. The first protrusions 35 are arranged to be axially separated from the magnetic working material 11.

[0233] The second core 40 has a second cylindrical portion 42 and a second protrusion 45. The inner diameter of the second cylindrical portion 42 is larger than the outer diameter of the first cylindrical portion 32. The first cylindrical portion 32 is arranged inside the second cylindrical portion 42. A permanent magnet 21 is sandwiched between the first cylindrical portion 32 and the second cylindrical portion 42.

[0234] The second protrusion 45 extends from the base end to the tip end, starting from the second cylindrical portion 42. Figure 26 It is formed by extending axially (upward) from the upper end and then radially inward. Multiple second protrusions 45 are provided at predetermined second intervals in the circumferential direction. Figure 26 In the example shown, eight second protrusions 45 are arranged in a circumferential direction in groups of two with equal intervals between each group. The second protrusions 45 are arranged to be axially separated from the magnetic working material 11.

[0235] exist Figure 27 In the example shown, the permanent magnet 21 is magnetized radially. The permanent magnet 21 is arranged such that: on the side of the first iron core 30 ( Figure 27 The inner radial side of the core is the N pole, and the second core 40 side is the N pole. Figure 27 The 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 21 can also be reversed.

[0236] The top ends of the first protrusion 35 and the second protrusion 45 are circumferentially opposite each other. The first protrusion 35 and the second protrusion 45 constitute the magnetic poles 25 of the magnetic field applying part 20. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45. Figure 26 In the example shown, eight magnetic gaps are provided. The magnetic working material 11 is arranged to be axially separated from the first protrusion 35 and the second protrusion 45.

[0237] When the first protrusion 35 and the second protrusion 45 are axially aligned with the magnetic working material 11, the magnetic flux flows circumferentially along the magnetic working material 11. It should be noted that the direction of magnetic flux flow is indicated by dashed arrows.

[0238] In the magnetic cooling device 10, magnetic flux flows from the permanent magnet 21 toward the first protrusion 35 of the first iron core 30. The magnetic flux flows circumferentially within the magnetic working material 11 in a manner from the first protrusion 35 to the second protrusion 45. Magnetic flux flows from the second protrusion 45 of the second iron core 40 toward the permanent magnet 21. As a result, the magnetic working material 11, to which a magnetic field is applied, heats up.

[0239] The Eighth Implementation Method

[0240] The eighth embodiment will be described.

[0241] like Figure 28 and Figure 29As shown, multiple magnetic working materials 11 are arranged circumferentially at predetermined first intervals. Figure 28 In the example shown, sixteen magnetic working materials 11, which extend in an arc along the circumference, are arranged at equal intervals along the circumference.

[0242] The magnetic field application part 20 has a permanent magnet 21, a first iron core 30, and a second iron core 40. The permanent magnet 21 is formed in a ring shape, for example.

[0243] The first iron core 30 has a first disc portion 31 and a first protrusion 35. A rotating shaft 16 is connected to the first disc portion 31. The first protrusion 35 extends radially outward from the first disc portion 31. Multiple first protrusions 35 are arranged circumferentially at predetermined second intervals. Figure 28 In the example shown, eight first protrusions 35 are arranged at equal intervals in the circumferential direction.

[0244] The second iron core 40 has a second disc portion 41 and a second protrusion 45. A rotating shaft 16 is connected to the second disc portion 41. A permanent magnet 21 is sandwiched between the first disc portion 31 and the second disc portion 41.

[0245] The second protrusion 45 extends radially outward from the base end to the top end, starting from the second disc portion 41 and then axially (towards) Figure 29 It is formed by extending from the upper part of the middle. Multiple second protrusions 45 are arranged circumferentially at predetermined second intervals. Figure 28 In the example shown, eight second protrusions 45 are arranged at equal intervals in the circumferential direction.

[0246] exist Figure 29 In the example shown, the permanent magnet 21 is magnetized along the axial direction. The permanent magnet 21 is arranged such that: on the side of the first iron core 30 ( Figure 29 The upper side of the middle core is the N pole, and the second iron core 40 side ( Figure 29 The lower 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 21 can also be reversed.

[0247] The top ends of the first protrusion 35 and the second protrusion 45 are radially opposite each other. The first protrusion 35 and the second protrusion 45 constitute the magnetic poles 25 of the magnetic field applying part 20. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45. Figure 28 In the example shown, eight magnetic gaps are provided. The magnetic working material 11 is axially opposite to the first protrusion 35 and the second protrusion 45.

[0248] When the first protrusion 35 and the second protrusion 45 are axially aligned with 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.

[0249] In the magnetic cooling device 10, magnetic flux flows from the permanent magnet 21 toward the first protrusion 35 of the first iron core 30. The magnetic flux flows radially within the magnetic working material 11 in a manner from the first protrusion 35 to the second protrusion 45. Magnetic flux flows from the second protrusion 45 of the second iron core 40 toward the permanent magnet 21. As a result, the magnetic working material 11, to which a magnetic field is applied, heats up.

[0250] Ninth Implementation Method

[0251] The ninth embodiment will be described.

[0252] like Figure 30 and Figure 31 As shown, multiple magnetic working materials 11 are arranged at intervals in the circumferential direction. Figure 30 In the example shown, sixteen magnetic working materials 11, which extend in an arc along the circumference, are arranged at equal intervals along the circumference.

[0253] The magnetic field application part 20 has a permanent magnet 21, a first iron core 30, and a second iron core 40. The permanent magnet 21 is formed in a ring shape, for example.

[0254] The first iron core 30 has a first cylindrical portion 32 and a first protrusion 35. The first protrusion 35 extends from the first cylindrical portion 32. Figure 31 The upper end of the first protrusion 35 extends axially (upwards). Multiple first protrusions 35 are provided at predetermined second intervals in the circumferential direction. Figure 30 In the example shown, eight first protrusions 35 are arranged at equal intervals in the circumferential direction. The first protrusions 35 are arranged to be axially separated from the magnetic working material 11.

[0255] The second core 40 has a second cylindrical portion 42 and a second protrusion 45. The inner diameter of the second cylindrical portion 42 is larger than the outer diameter of the first cylindrical portion 32. The first cylindrical portion 32 is arranged inside the second cylindrical portion 42. A permanent magnet 21 is sandwiched between the first cylindrical portion 32 and the second cylindrical portion 42.

[0256] The second protrusion 45 extends from the second cylindrical portion 42. Figure 31 The upper end of the middle part extends axially (upward). Multiple second protrusions 45 are provided at predetermined second intervals in the circumferential direction. Figure 30 In the example shown, eight second protrusions 45 are arranged at equal intervals in the circumferential direction. The second protrusions 45 are arranged to be axially separated from the magnetic working material 11.

[0257] exist Figure 31 In the example shown, the permanent magnet 21 is magnetized radially. The permanent magnet 21 is arranged such that: on the side of the first iron core 30 ( Figure 31 The inner radial side of the core is the N pole, and the second core 40 side is the N pole. Figure 31The 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 21 can also be reversed.

[0258] The top ends of the first protrusion 35 and the second protrusion 45 are radially opposite each other. The first protrusion 35 and the second protrusion 45 constitute the magnetic poles 25 of the magnetic field applying part 20. A magnetic gap is provided between the first protrusion 35 and the second protrusion 45. Figure 30 In the example shown, eight magnetic gaps are provided. The magnetic working material 11 is arranged to be axially separated from the first protrusion 35 and the second protrusion 45.

[0259] When the first protrusion 35 and the second protrusion 45 are axially aligned with 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.

[0260] In the magnetic cooling device 10, magnetic flux flows from the permanent magnet 21 toward the first protrusion 35 of the first iron core 30. The magnetic flux flows radially within the magnetic working material 11 in a manner from the first protrusion 35 to the second protrusion 45. Magnetic flux flows from the second protrusion 45 of the second iron core 40 toward the permanent magnet 21. As a result, the magnetic working material 11, to which a magnetic field is applied, heats up.

[0261] Other Implementation Methods

[0262] The above implementation method can also adopt the following structure.

[0263] In the above embodiment, a permanent magnet 21 is used as the magnetic field generating unit, but it is not limited to this method. For example, an electromagnet can also be used as the magnetic field generating unit.

[0264] In the above embodiment, a ring-shaped permanent magnet 21 is used, but a polygonal permanent magnet 21 can also be used, for example. In addition, considering the ease of assembly of the permanent magnet 21, the permanent magnet 21 can be configured as a permanent magnet 21 divided into two parts and assembled into a ring shape.

[0265] 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.

[0266] -Industry Applicability-

[0267] In summary, this disclosure is useful for magnetic refrigeration devices and refrigeration devices.

[0268] - Symbol Explanation -

[0269] 1. Refrigeration unit

[0270] 2. Heat transfer medium circuit

[0271] 10 Magnetic Refrigeration Device

[0272] 11 magnetic working materials

[0273] 20 Magnetic field application section

[0274] 21 Permanent magnets (magnetic field generating unit)

[0275] 30 First Iron Core

[0276] 35 First protrusion

[0277] 40 Second Iron Core

[0278] 45 Second protrusion

Claims

1. A magnetic refrigeration device, characterized in that: The magnetic refrigeration device includes multiple magnetic working materials (11) and a magnetic field application part (20). The plurality of said magnetic working materials (11) are arranged apart by a predetermined first interval in a first direction. The magnetic field applying part (20) moves relative to the magnetic working material (11) along the first direction, and the magnetic field applying part (20) applies a magnetic field to the magnetic working material (11). The magnetic field applying part (20) has a magnetic field generating part (21), a first iron core (30), and a second iron core (40). The first iron core (30) is disposed on one of the two magnetic poles of the magnetic field generating part (21), and the second iron core (40) is disposed on the other magnetic pole side of the magnetic field generating part (21). Between the first iron core (30) and the second iron core (40), three or more magnetic gaps are provided with a second interval spaced apart in the first direction, wherein the second interval is more than twice the size of the first interval. The first iron core (30) has more than three first protrusions (35). The second core (40) has three or more second protrusions (45) that are respectively opposite to the first protrusion (35). The magnetic gaps are respectively disposed between the first protrusion (35) and the second protrusion (45).

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 the circumferential direction.

3. The magnetic refrigeration device according to claim 2, characterized in that: The magnetic field generating unit (21) is configured to generate a magnetic field along the axial direction. The first protrusion (35) extends radially. The second protrusion (45) extends radially.

4. The magnetic refrigeration device according to claim 2, characterized in that: The magnetic field generating unit (21) is configured to generate a magnetic field in the radial direction. The first protrusion (35) extends radially. The second protrusion (45) extends radially.

5. The magnetic refrigeration device according to claim 2, characterized in that: The magnetic field generating unit (21) is configured to generate a magnetic field in the radial direction. The first protrusion (35) extends axially. The second protrusion (45) extends axially.

6. The magnetic refrigeration device according to claim 2, characterized in that: The magnetic field generating unit (21) is configured to generate a magnetic field along the axial direction. The first protrusion (35) extends axially. The second protrusion (45) extends axially.

7. The magnetic refrigeration device according to claim 2, characterized in that: The magnetic field generating unit (21) is configured to generate a magnetic field along the axial direction. The first protrusion (35) extends radially. The second protrusion (45) extends axially.

8. The magnetic refrigeration device according to any one of claims 3 to 7, characterized in that: The magnetic working material (11) is arranged between the first protrusion (35) and the second protrusion (45) and is arranged at the position of minimum magnetic resistance.

9. The magnetic refrigeration device according to any one of claims 3 to 7, characterized in that: The magnetic working material (11) is arranged at a position opposite to the top end of the first protrusion (35) and the top end of the second protrusion (45).

10. A refrigeration device, characterized in that: The refrigeration device includes a magnetic refrigeration device (10) as described in any one of claims 1 to 9, and a heat medium circuit (2) that exchanges heat with the magnetic refrigeration device (10).

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