Rotary magnetic refrigeration component and magnetic refrigeration equipment

Abstract

The invention discloses a rotary magnetic refrigeration component and magnetic refrigeration equipment. In the rotary magnetic refrigeration part, a plurality of magnetic refrigeration beds of a stator assembly are the same in shape and size, are all in the shape of a regular cylinder with an arc-shaped cross section and are arranged in a ring shape in a mutual close fit mode, and a cold end port and a hot end port are formed in the peripheral face of each magnetic refrigeration bed. The plurality of magnet units of the rotor assembly are arranged at intervals along the circumferential direction, and the plurality of magnet units are the same in shape and size; each magnet unit comprises a first main magnet, a second main magnet, a first auxiliary magnet, a second auxiliary magnet, a third auxiliary magnet, a fourth auxiliary magnet, a first magnetic conductive magnetic head and a second magnetic conductive magnetic head which occupy equal angles, and the angle occupied by the first permanent magnet is equal to the angle occupied by the gap between the magnet units. The product is low in cost, low in production difficulty, high in refrigeration efficiency and compact in structure.

Description

Technical Field

[0001] The present invention relates to a rotary magnetic refrigeration component and a magnetic refrigeration device. Background Art

[0002] In traditional rotary magnetic refrigeration components, the magnet system is generally a C-shaped magnet or a Halbach cylindrical magnet array. During one rotation cycle, the number of magnetization-demagnetization cycles experienced by the magnetic working fluid is small, the usage amount of permanent magnets is large, and the requirements for the assembly accuracy and magnetization direction accuracy of the permanent magnets are high. Summary of the Invention

[0003] The present invention provides a rotary magnetic refrigeration component and a magnetic refrigeration device to increase the number of magnetization-demagnetization cycles, reduce the usage amount of permanent magnets, lower the requirements for assembly accuracy, and lower the requirements for magnetization direction accuracy.

[0004] The present invention provides the following technical solution: a rotary magnetic refrigeration component, comprising a stator assembly and a rotor assembly;

[0005] The stator assembly includes: a plurality of magnetic refrigeration beds, the shapes and sizes of the plurality of magnetic refrigeration beds are the same, and they are all in the shape of a regular cylinder with an arc-shaped cross-section, and are arranged in a circular ring in a closely fitting manner. Cold end ports and hot end ports are provided on the outer peripheral surfaces of the magnetic refrigeration beds;

[0006] The rotor assembly includes: a plurality of magnet units, the plurality of magnet units are arranged at intervals in the circumferential direction, the shapes and sizes of the plurality of magnet units are the same, and the number of the magnetic refrigeration beds is twice the number of the magnet units;

[0007] The magnet unit includes: a first main magnet, a second main magnet, a first sub-magnet, a second sub-magnet, a third sub-magnet, a fourth sub-magnet, a first magnetic guiding head, and a second magnetic guiding head, all of which are in the shape of a regular cylinder with an arc-shaped cross-section and occupy equal angles. The angle occupied by the first main magnet is equal to the angle occupied by the gap between the magnet units;

[0008] The first sub-magnet and the fourth sub-magnet are equal in size, stacked axially, and axially aligned;

[0009] The inner peripheral surface of the first main magnet is in close contact with the outer peripheral surface of the first sub-magnet and they are radially aligned. The inner peripheral surface of the second main magnet is in close contact with the outer peripheral surface of the fourth sub-magnet and they are radially aligned. The first main magnet and the second main magnet are equal in size. The end surface of the first main magnet facing away from the second main magnet is flush with the end surface of the first sub-magnet facing away from the fourth sub-magnet. The end surface of the second main magnet facing away from the first main magnet is flush with the end surface of the fourth sub-magnet facing away from the first sub-magnet;

[0010] The inner peripheral surface of the first magnetic conduction head is in close contact with the outer peripheral surface of the first sub-magnet and they are radially aligned. One end face of the first magnetic conduction head is in close contact with one end face of the first main magnet facing the second main magnet. The inner peripheral surface of the second magnetic conduction head is in close contact with the outer peripheral surface of the fourth sub-magnet and they are radially aligned. One end face of the second magnetic conduction head is in close contact with one end face of the second main magnet facing the first main magnet;

[0011] The first main magnet and the second main magnet have equal dimensions. The first magnetic conduction head and the second magnetic conduction head have equal dimensions, and the radial dimensions of all four are equal;

[0012] A spacing is left between the first magnetic conduction head and the second magnetic conduction head;

[0013] The inner peripheral surface of the second sub-magnet is in close contact with the outer peripheral surfaces of the first main magnet and the first magnetic conduction head. The first side end face of the second sub-magnet is flush with the end face of the first main magnet facing away from the second main magnet. The second side end face of the second sub-magnet is flush with the side end face of the first magnetic conduction head facing away from the first main magnet. The second sub-magnet is radially aligned with the first sub-magnet;

[0014] The inner peripheral surface of the third sub-magnet is in close contact with the outer peripheral surfaces of the second main magnet and the second magnetic conduction head. The first side end face of the third sub-magnet is flush with the end face of the second main magnet facing away from the first main magnet. The second side end face of the third sub-magnet is flush with the side end face of the second magnetic conduction head facing away from the second main magnet. The third sub-magnet is radially aligned with the fourth sub-magnet;

[0015] The second sub-magnet and the third sub-magnet have the same dimensions;

[0016] The magnetization directions of the first sub-magnet and the third sub-magnet are both radially outward. The magnetization directions of the fourth sub-magnet and the second sub-magnet are both radially inward. The magnetization directions of the first main magnet and the second main magnet are both in the direction from the first sub-magnet to the fourth sub-magnet;

[0017] The rotor assembly further includes a yoke, and the yoke covers the inner peripheral surface and two end faces of the overall shapes of the first main magnet, the second main magnet, the first sub-magnet, the second sub-magnet, the third sub-magnet, and the fourth sub-magnet;

[0018] The magnet units form an arc-shaped vacant space, and the rotor assembly can be controlled to rotate so that the plurality of magnetic refrigeration beds can enter and exit the arc-shaped vacant space.

[0019] Specifically, the arc-shaped vacant spaces formed by each of the magnet units are circumferentially aligned.

[0020] Specifically, the rotation axis of the rotor assembly, the central axis of the cylindrical space defined by the plurality of magnet units, and the central axis of the cylindrical space formed by arranging the plurality of magnetic refrigeration beds in a circular shape are the same straight line.

[0021] The magnetization direction of each of the above magnets specifically refers to the magnetization direction of the central region of the magnet. The magnetization direction of the peripheral region of the magnet may be slightly different from that of the central region, and the allowable error between the two should be less than 90°.

[0022] Specifically, each magnet is arc-shaped. Its inner circumferential surface refers to the inner curved surface, its outer circumferential surface refers to the outer curved surface, both end faces are flat and connected to the same-side curved boundaries of the inner circumferential surface and the outer circumferential surface, and the other two side faces are flat and connected to the same-side straight boundaries of the inner circumferential surface and the outer circumferential surface.

[0023] Each magnet can be selected from NdFeB or SmCo.

[0024] In some embodiments, the number of the yokes is multiple and they are arranged in one-to-one correspondence with the magnet units. The yoke includes a first end plate, a second end plate, and an inner side plate that are integrally connected. The same-side end faces of the first sub-magnet, the first main magnet, and the second sub-magnet are fixed on the first end plate. The same-side end faces of the third sub-magnet, the second main magnet, and the fourth sub-magnet are fixed on the second end plate. The inner circumferential surfaces of the first sub-magnet and the fourth sub-magnet are fixed on the inner side plate.

[0025] The fixing method is, for example, pasting.

[0026] In some embodiments, the rotor assembly further includes a first baffle, a second baffle, a first bearing, a second bearing, and a fixing sleeve;

[0027] The fixing sleeve is cylindrical;

[0028] The first end plate of the yoke is fixed on the first baffle;

[0029] The first baffle is connected to the outer ring of the first bearing, and the inner ring of the first bearing is connected to the outer peripheral surface of the fixing sleeve;

[0030] The second end plate of the yoke is fixed on the second baffle;

[0031] The second baffle is connected to the outer ring of the second bearing, and the inner ring of the second bearing is connected to the outer peripheral surface of the fixing sleeve.

[0032] In some embodiments, the first baffle has an annular section in the shape of a circle and a plurality of arc-shaped sections extending radially outward from the annular section. The arc-shaped sections are arranged in one-to-one correspondence with the magnet units and are axially aligned with the corresponding magnet units. The second baffle has an annular section in the shape of a circle and a plurality of arc-shaped sections extending radially outward from the annular section. The arc-shaped sections are arranged in one-to-one correspondence with the magnet units and are axially aligned with the corresponding magnet units.

[0033] With such a design, the outer shapes of the first baffle, the second baffle and the magnet units match.

[0034] The first baffle and the second baffle may also be integrally circular.

[0035] In some embodiments, the first baffle and the magnet unit are fixedly connected in a pasting manner. The second baffle and the magnet unit are fixedly connected in a pasting manner.

[0036] In some embodiments, the number of magnet units is greater than or equal to 3. The number of magnet units is, for example, 3, 4 or 5. The larger the number, the more excitation and demagnetization cycles each magnetic refrigeration bed experiences when the rotor assembly rotates one week.

[0037] In some embodiments, the magnetic yoke is made of soft magnetic material. The soft magnetic material is, for example, soft magnetic steel.

[0038] In some embodiments, the first magnetic conduction head and the second magnetic conduction head are made of FeCo alloy or FeNi alloy.

[0039] The main magnet and the sub-magnet are both permanent magnets. In some embodiments, the materials, remanence and coercivity of the first main magnet, the second main magnet, the first sub-magnet, the second sub-magnet, the third sub-magnet and the fourth sub-magnet are the same. With such a design, it is convenient for the magnetic field design of the system.

[0040] The magnet unit is symmetric up and down as a whole, which makes the magnetic field intensity in the arc-shaped vacant space as large and uniform as possible.

[0041] The present invention provides the following technical solution: a magnetic refrigeration device, including the aforementioned rotary magnetic refrigeration component. Among them, the cold end ports of the multiple magnetic refrigeration beds of the rotary magnetic refrigeration component are sequentially numbered in the circumferential direction. The cold end ports of the magnetically refrigerated beds with odd numbers are connected to the first cold end summary port, and the hot end ports of the magnetically refrigerated beds with odd numbers are connected to the first hot end summary port. The cold end ports of the magnetically refrigerated beds with even numbers are connected to the second cold end summary port, and the hot end ports of the magnetically refrigerated beds with even numbers are connected to the second hot end summary port. The magnetically refrigerated beds with odd numbers as a whole form a first refrigeration bed group, and the magnetically refrigerated beds with even numbers as a whole form a second refrigeration bed group.

[0042] The magnetic refrigeration device further includes: a heat exchange fluid container, a water pump, a valve assembly, a refrigeration chamber, and a radiator; the water pump, the heat exchange fluid container, and the radiator are connected in series in sequence to form a first series branch; a first refrigeration bed group, the refrigeration chamber, and a second refrigeration bed group are connected in series in sequence to form a second series branch; the valve assembly is connected to both ends of the first series branch and both ends of the second series branch to form a loop; wherein the flow direction of the heat exchange fluid in the first series branch is fixed, and the valve assembly is used to switch the flow direction of the heat exchange fluid in the second series branch.

[0043] The magnetic refrigeration device further includes a controller for synchronizing the state switching of the valve assembly with the rotation state of the magnet unit. The operating mechanism of the controller is as follows.

[0044] The magnetic refrigeration bed is filled with a magnetic working medium. When the magnetically refrigerated beds with odd numbers are facing the magnet unit, the magnetic flux density therein is the largest. At this time, the gaps between the magnetically refrigerated beds with even numbers and the magnet unit are facing each other, and the magnetic flux density therein is the smallest. When the gaps between the magnetically refrigerated beds with odd numbers and the magnet unit are facing each other, the magnetic flux density therein is the smallest. At this time, the magnetically refrigerated beds with even numbers are facing the magnet unit, and the magnetic flux density therein is the largest.

[0045] When the magnetic flux density in the magnetically refrigerated beds with odd numbers decreases from large to small, the magnetic working medium undergoes a demagnetization process, the magnetic working medium absorbs heat, and the temperature of the heat exchange fluid flowing through the magnetic working medium decreases. During this period, the magnetic flux density in the magnetic working medium in the magnetically refrigerated beds with even numbers increases from small to large, the magnetic working medium undergoes a magnetization process, and the temperature of the heat exchange fluid flowing through the magnetic working medium increases.

[0046] When the magnetic flux density in the magnetically refrigerated beds with odd numbers increases from small to large, the magnetic working medium undergoes a magnetization process, the magnetic working medium releases heat, and the temperature of the heat exchange fluid flowing through the magnetic working medium increases. During this period, the magnetic flux density in the magnetically refrigerated beds with even numbers decreases from large to small, the magnetic working medium undergoes a demagnetization process, and the temperature of the heat exchange fluid flowing through the magnetic working medium decreases.

[0047] When the heat exchange fluid is refrigerated in the magnetically refrigerated beds with odd numbers, the heat exchange fluid flows out of the magnetically refrigerated beds with odd numbers and then sequentially passes through the refrigeration chamber, the magnetically refrigerated beds with even numbers, the radiator, the heat exchange fluid container, the water pump, and then flows back to the magnetically refrigerated beds with odd numbers. When the heat exchange fluid is heated in the magnetically refrigerated beds with odd numbers, the heat exchange fluid flows out of the magnetically refrigerated beds with even numbers and then sequentially passes through the refrigeration chamber, the magnetically refrigerated beds with odd numbers, the radiator, the heat exchange fluid container, the water pump, and then flows back to the magnetically refrigerated beds with even numbers for the heat exchange fluid.

[0048] The permanent magnets used in the present invention are less in amount, and magnetic heads are used to replace a part of the permanent magnets, reducing the amount of permanent magnets used and the cost.

[0049] The magnetic field in the arc-shaped vacant space is insensitive to the magnetization direction of each permanent magnet, and small deviations have little impact on the periodic magnetic field, which is beneficial to the actual assembly and magnetization processes.

[0050] The magnetic field in the arc-shaped vacant space is insensitive to the dimensional accuracy and alignment accuracy of each permanent magnet and the magnetic conduction head. The dimensional errors of each permanent magnet and the magnetic conduction head in the axial, circumferential, and radial directions are less than 1 cm, and the alignment error of each permanent magnet and the magnetic conduction head is less than 1 cm.

[0051] During one rotation of the permanent magnetic field of the present invention, the magnetic working medium in each magnetic refrigeration bed experiences the same number of magnetization and demagnetization cycles as the number of magnet units, significantly increasing the number of magnetization and demagnetization times, which is beneficial to improving the refrigeration performance of magnetic refrigeration.

[0052] The rotary magnetic refrigeration component has a compact structure, which is beneficial to the miniaturized design of magnetic refrigeration equipment. Description of the Drawings

[0053] Figure 1 is a schematic structural diagram of the rotor assembly in the rotary magnetic refrigeration component of the present invention.

[0054] Figure 2 is Figure 1 a partial enlarged view of

[0055] Figure 3 is Figure 1 a cross-sectional view of the rotor assembly shown in

[0056] Figure 4 is a schematic structural diagram of the stator assembly in the rotary magnetic refrigeration component of the present invention.

[0057] Figure 5 is Figure 1 a magnetic field line simulation diagram of the rotor assembly shown in

[0058] Figure 6 is a schematic structural diagram of the magnetic refrigeration equipment of the present invention.

[0059] The reference numerals are as follows: 1, fixed sleeve; 21, first baffle; 22, second baffle; 2a, annular section; 2b, arc section; 31, first bearing; 32, second bearing; 40, arc-shaped vacant space; 41, magnetic yoke; 42, first main magnet; 43, second main magnet; 44, first sub-magnet; 45, second sub-magnet; 46, third sub-magnet; 47, fourth sub-magnet; 48, first magnetic conduction head; 49, second magnetic conduction head; 5, magnetic refrigeration bed; 51, cold end port; 52, hot end port; 5a, odd-numbered magnetic refrigeration bed; 5b, even-numbered magnetic refrigeration bed; 10, heat exchange fluid container; 20, water pump; 3a to 3d, first valve to fourth valve; 6, refrigeration chamber; 7, radiator. Detailed implementation mode

[0060] The present invention will be further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0061] Note: The "arc" described in the present invention refers to a shape in which the inner curve and the outer curve of the cross-section of a planar shape or a regular cylinder shape have the same center of the circle, and both have the same central angle, and the straight line connecting the endpoints of the inner curve and the outer curve passes through the center of the circle. It can be analogized to the shape of the fan surface of a folding paper fan in the unfolded state. The angle occupied by the arc object is the central angle corresponding thereto.

[0062] Example 1

[0063] Reference Figures 1 to 5 , Embodiment 1 provides a rotary magnetic refrigeration component, including a stator assembly and a rotor assembly.

[0064] The stator assembly includes 8 magnetic refrigeration beds 5. The shapes and sizes of the 8 magnetic refrigeration beds 5 are the same and are all in the shape of a regular cylinder with a circular arc cross-section. The magnetic refrigeration beds 5 are filled with magnetic working medium inside. The 8 magnetic refrigeration beds 5 are arranged in a circular ring. Cold end ports 51 and hot end ports 52 are provided on the outer peripheral surfaces of the magnetic refrigeration beds 5. Adjacent magnetic refrigeration beds 5 are closely attached.

[0065] The rotor assembly includes 4 magnet units. The 4 magnet units are arranged at intervals in the circumferential direction. The shapes and sizes of the 4 magnet units are the same. The angle occupied by the magnet unit is equal to the angle occupied by the gap between the magnet units.

[0066] The magnet unit includes a first main magnet 42, a second main magnet 43, a first sub-magnet 44, a second sub-magnet 45, a third sub-magnet 46, a fourth sub-magnet 47, a first magnetic guiding head 48 and a second magnetic guiding head 49. The first main magnet 42, the second main magnet 43, the first sub-magnet 44, the second sub-magnet 45, the third sub-magnet 46, the fourth sub-magnet 47, the first magnetic guiding head 48 and the second magnetic guiding head 49 are all in the shape of a regular cylinder with a circular arc cross-section and occupy equal angles. This angle is defined as the angle occupied by the magnet unit.

[0067] The magnetization direction of the first sub-magnet 44 is radially outward, and the magnetization direction of the fourth sub-magnet 47 is radially inward. The two have the same size, are stacked axially and are axially aligned.

[0068] The magnetization direction of the first main magnet 42 is the direction from the first sub-magnet 44 to the fourth sub-magnet 47. The inner peripheral surface of the first main magnet 42 is in close contact with the outer peripheral surface of the first sub-magnet 44 and they are radially aligned.

[0069] The magnetization direction of the second main magnet 43 is the direction from the first sub-magnet 44 to the fourth sub-magnet 47. The inner peripheral surface of the second main magnet 43 is in close contact with the outer peripheral surface of the fourth sub-magnet 47, and the two are radially aligned.

[0070] The first main magnet 42 and the second main magnet 43 have the same size. The end face of the first main magnet 42 facing away from the second main magnet 43 is flush with the end face of the first sub-magnet 44 facing away from the fourth sub-magnet 47. The end face of the second main magnet 43 facing away from the first main magnet 42 is flush with the end face of the fourth sub-magnet 47 facing away from the first sub-magnet 44.

[0071] The inner peripheral surface of the first magnetic conduction head 48 is in close contact with the outer peripheral surface of the first sub-magnet 44, and the two are radially aligned. One side end face of the first magnetic conduction head 48 is in close contact with one side end face of the first main magnet 42 facing the second main magnet 43. The inner peripheral surface of the first magnetic conduction head 48 is flush with the inner peripheral surface of the first main magnet 42.

[0072] The inner peripheral surface of the second magnetic conduction head 49 is in close contact with the outer peripheral surface of the fourth sub-magnet 47, and the two are radially aligned. One side end face of the second magnetic conduction head 49 is in close contact with one side end face of the second main magnet 43 facing the first main magnet 42. The inner peripheral surface of the second magnetic conduction head 49 is flush with the inner peripheral surface of the second main magnet 43.

[0073] The first magnetic conduction head 48 and the second magnetic conduction head 49 have the same size and there is a gap between them.

[0074] The inner peripheral surface of the second sub-magnet 45 is in close contact with the outer peripheral surfaces of the first main magnet 42 and the first magnetic conduction head 48. The first side end face of the second sub-magnet 45 is flush with the end face of the first main magnet 42 facing away from the second main magnet 43. The second side end face of the second sub-magnet 45 is flush with one side end face of the first magnetic conduction head 48 facing away from the first main magnet 42. The second sub-magnet 45 is radially aligned with the first sub-magnet 44. The magnetization direction of the second sub-magnet 45 is radially inwards.

[0075] The inner peripheral surface of the third sub-magnet 46 is in close contact with the outer peripheral surfaces of the second main magnet 43 and the second magnetic conduction head 49. The first side end face of the third sub-magnet 46 is flush with the end face of the second main magnet 43 facing away from the first main magnet 42. The second side end face of the third sub-magnet 46 is flush with one side end face of the second magnetic conduction head 49 facing away from the second main magnet 43. The third sub-magnet 46 is radially aligned with the fourth sub-magnet 47. The magnetization direction of the third sub-magnet 46 is radially outwards.

[0076] The second sub-magnet 45 and the third sub-magnet 46 have the same size.

[0077] The rotor assembly further includes a plurality of yokes 41, which are arranged in one-to-one correspondence with the magnet units. The yoke 41 includes a first end plate, a second end plate and an inner side plate that are integrally connected. The same-side end faces of the first sub-magnet 44, the first main magnet 42 and the second sub-magnet 45 are pasted on the first end plate and the pasting surfaces are axially aligned. The same-side end faces of the third sub-magnet 46, the second main magnet 43 and the fourth sub-magnet 47 are pasted on the second end plate and the pasting surfaces are axially aligned. The inner peripheral surfaces of the first sub-magnet 44 and the fourth sub-magnet 47 are pasted on the inner side plate and the pasting surfaces are radially aligned.

[0078] The arc-shaped vacant spaces 40 formed by each magnet unit are axially aligned. The arc-shaped vacant space 40 is arc-shaped.

[0079] Eight magnetic refrigeration beds 5 are sleeved in the arc-shaped vacant spaces 40 of the four magnet units.

[0080] The rotor assembly can be controlled to rotate so that the eight magnetic refrigeration beds 5 can enter and exit the arc-shaped vacant spaces 40. Among them, the rotation axis, the central axis of the circular cylindrical space defined by the four magnet units, and the central axis of the circular cylindrical space formed by arranging the eight magnetic refrigeration beds 5 in a circular shape are the same straight line.

[0081] The rotor assembly further includes a first baffle 21, a second baffle 22, a first bearing 31, a second bearing 32 and a fixed sleeve 1;

[0082] The fixed sleeve 1 is cylindrical;

[0083] The first end plate of the yoke 41 is fixed on the first baffle 21;

[0084] The first baffle 21 is connected to the outer ring of the first bearing 31, and the inner ring of the first bearing 31 is connected to the outer peripheral surface of the fixed sleeve 1;

[0085] The second end plate of the yoke 41 is fixed on the second baffle 22;

[0086] The second baffle 22 is connected to the outer ring of the second bearing 32, and the inner ring of the second bearing 32 is connected to the outer peripheral surface of the fixed sleeve 1.

[0087] The first baffle 21 has an annular section 2a in a circular shape and four arc-shaped sections 2b extending radially outward from the annular section 2b. The arc-shaped sections 2b are arranged in one-to-one correspondence with the magnet units and are axially aligned with the corresponding magnet units.

[0088] The second baffle 22 has an annular section 2a in a circular shape and four arc-shaped sections 2b extending radially outward from the annular section 2b. The arc-shaped sections 2b are arranged in one-to-one correspondence with the magnet units and are axially aligned with the corresponding magnet units.

[0089] The first baffle 21 is fixedly connected to the magnet unit in a pasting manner; the second baffle 22 is fixedly connected to the magnet unit in a pasting manner.

[0090] The number of magnet units is 4.

[0091] The yoke 41 is made of soft magnetic material.

[0092] The first magnetic conduction head 48 and the second magnetic conduction head 49 are made of FeCo alloy.

[0093] The first main magnet 42, the second main magnet 43, the first sub-magnet 44, the second sub-magnet 45, the third sub-magnet 46, and the fourth sub-magnet 47 are NdFeB permanent magnets with the same remanence and coercivity.

[0094] Reference Figure 5 , the magnetic field distribution between the first magnetic conduction head 48 and the second magnetic conduction head 49 is uniform and the intensity is large.

[0095] Example 2

[0096] Reference Figure 6 And in combination with Figures 1 to 4 , Embodiment 2 provides a magnetic refrigeration device, including the above-mentioned rotary magnetic refrigeration component. Among them, the 8 magnetic refrigeration beds 5 of the rotary magnetic refrigeration component are sequentially numbered in the circumferential direction. The cold-end ports 51 of the magneto-refrigeration beds 5a with odd numbers are connected to the first cold-end summary port, and the hot-end ports 52 of the magneto-refrigeration beds 5a with odd numbers are connected to the first hot-end summary port. The cold-end ports 51 of the magneto-refrigeration beds 5b with even numbers are connected to the second cold-end summary port, and the hot-end ports 52 of the magneto-refrigeration beds 5b with even numbers are connected to the second hot-end summary port.

[0097] The first cold-end summary port and the first hot-end summary port are in a peer-to-peer relationship, which are the two ends of the magneto-refrigeration bed 5a with an odd number in Figure 6 . The second cold-end summary port and the second hot-end summary port are in a peer-to-peer relationship, which are the two ends of the magneto-refrigeration bed 5b with an even number in Figure 6 .

[0098] The magnetic refrigeration bed 5 is filled with a magnetic working medium. When the magneto-refrigeration bed 5a with an odd number is facing the magnet unit, the magnetic flux density inside it is the largest. At this time, the gap between the magneto-refrigeration bed 5b with an even number and the magnet unit is facing, and the magnetic flux density inside it is the smallest. When the gap between the magneto-refrigeration bed 5a with an odd number and the magnet unit is facing, the magnetic flux density inside it is the smallest. At this time, the magneto-refrigeration bed 5b with an even number is facing the magnet unit, and the magnetic flux density inside it is the largest.

[0099] When the magnetic flux density in the odd-numbered magnetic refrigeration bed 5a decreases from a large value, the magnetic working fluid undergoes a demagnetization process, the magnetic working fluid absorbs heat, and the temperature of the heat exchange fluid flowing through the magnetic working fluid decreases. During this period, the magnetic flux density in the magnetic working fluid in the even-numbered magnetic refrigeration bed 5b increases from a small value, the magnetic working fluid undergoes a magnetization process, and the temperature of the heat exchange fluid flowing through the magnetic working fluid increases.

[0100] When the magnetic flux density in the odd-numbered magnetic refrigeration bed 5a increases from a small value, the magnetic working fluid undergoes a magnetization process, the magnetic working fluid releases heat, and the temperature of the heat exchange fluid flowing through the magnetic working fluid increases. During this period, the magnetic flux density in the magnetic working fluid in the even-numbered magnetic refrigeration bed 5b decreases from a large value, the magnetic working fluid undergoes a demagnetization process, and the temperature of the heat exchange fluid flowing through the magnetic working fluid decreases.

[0101] The magnetic refrigeration device further includes: a heat exchange fluid container 10 for storing the heat exchange fluid; a water pump 20 for driving the flow of the heat exchange fluid; a valve assembly for controlling the flow direction of the heat exchange fluid; a refrigeration chamber 6 for providing cold energy to the outside; and a radiator 7 for dissipating heat to the outside.

[0102] The water pump 20, the heat exchange fluid container 10, and the radiator 7 are connected in series in sequence to form a first series branch; the first refrigeration bed group formed by the odd-numbered magnetic refrigeration beds 5a as a whole, the refrigeration chamber 6, and the second refrigeration bed group formed by the even-numbered magnetic refrigeration beds 5b as a whole are connected in series in sequence to form a second series branch; the valve assembly is connected to both ends of the first series branch and both ends of the second series branch to form a loop; wherein the flow direction of the heat exchange fluid in the first series branch is fixed, and the valve assembly is used to switch the flow direction of the heat exchange fluid in the second series branch.

[0103] Specifically, the valve assembly includes a first valve 3a, a second valve 3b, a third valve 3c, and a fourth valve 3d. The first valve 3a is connected between the water pump 20 and the first refrigeration bed group, the second valve 3b is connected between the first refrigeration bed group and the heat exchanger 7, the third valve 3c is connected between the water pump 20 and the second refrigeration bed group, and the fourth valve 3d is connected between the second refrigeration bed group and the heat exchanger 7.

[0104] The state switching of the valve assembly is synchronized with the rotation process of the rotor assembly. The magnetic refrigeration device further includes a controller for synchronizing the state switching of the valve assembly with the rotation of the rotor assembly.

[0105] When the heat exchange fluid is refrigerated in the odd-numbered magnetic refrigeration bed 5a (the odd-numbered magnetic refrigeration bed 5a moves from facing the magnet unit to completely disengaging from the magnet unit), after flowing out of the odd-numbered magnetic refrigeration bed 5a, the heat exchange fluid sequentially passes through the refrigeration chamber 6, the even-numbered magnetic refrigeration bed 5b, the fourth valve 3d, the radiator 7, the heat exchange fluid container 10, the water pump 20, and the first valve 3a and then flows back into the odd-numbered magnetic refrigeration bed 5a. During this process, the first valve 3a and the fourth valve 3d are opened, and the second valve 3b and the third valve 3c are closed.

[0106] When the heat exchange fluid is heating in the odd-numbered magnetic cooling bed 5a (the odd-numbered magnetic cooling bed 5a is completely separated from the magnet unit to facing the magnet unit), the heat exchange fluid flows out of the even-numbered magnetic cooling bed 5b and then passes through the cooling chamber 6, the odd-numbered magnetic cooling bed 5a, the second valve 3b, the radiator 7, the heat exchange fluid container 10, the water pump 20, the third valve 3c, and then flows back to the heat exchange fluid of the even-numbered magnetic cooling bed 5b. In this process, the first valve 3a and the fourth valve 3d are closed, and the second valve 3b and the third valve 3c are opened.

[0107] The present invention is not limited to the above-mentioned embodiments. Without departing from the essential content of the present invention, any deformation, improvement and substitution that can be conceived by those skilled in the art shall fall within the scope of the present invention.

Claims

1. A rotary magnetic refrigeration component, characterized in that: including a stator assembly and a rotor assembly; The stator assembly comprises: a plurality of magnetic cooling beds, which are of the same shape and size, are in the shape of regular cylinders with arc cross sections, and are arranged in a circular ring in a manner of being closely fitted to each other, and a cold end port and a hot end port are arranged on the outer peripheral surface of each of the magnetic cooling beds; The rotor assembly comprises: a plurality of magnet units, the plurality of magnet units are arranged at intervals along the circumferential direction, the plurality of magnet units have the same shape and size, and the number of the magnetic refrigeration bed is twice the number of the magnet units; The magnet unit comprises: a first main magnet, a second main magnet, a first secondary magnet, a second secondary magnet, a third secondary magnet, a fourth secondary magnet, a first magnetic conductive head and a second magnetic conductive head, all of which are in the shape of a regular cylinder with an arc cross section and occupy equal angles, and the angle occupied by the first main magnet is equal to the angle occupied by the gap between the magnet units; The first secondary magnet and the fourth secondary magnet are equal in size, stacked in the axial direction and aligned in the axial direction; The inner circumference of the first main magnet is in close contact with the outer circumference of the first secondary magnet and the two are aligned in radial direction, the inner circumference of the second main magnet is in close contact with the outer circumference of the fourth secondary magnet and the two are aligned in radial direction, the first main magnet and the second main magnet are of equal size, the end surface of the first main magnet facing away from the second main magnet is flush with the end surface of the first secondary magnet facing away from the fourth secondary magnet, and the end surface of the second main magnet facing away from the first main magnet is flush with the end surface of the fourth secondary magnet facing away from the first secondary magnet; The inner circumference of the first magnetic conductive head is in close contact with the outer circumference of the first secondary magnet and the two are aligned in radial direction, one end surface of the first magnetic conductive head is in close contact with the end surface of the first main magnet facing the second main magnet, the inner circumference of the second magnetic conductive head is in close contact with the outer circumference of the fourth secondary magnet and the two are aligned in radial direction, one end surface of the second magnetic conductive head is in close contact with the end surface of the second main magnet facing the first main magnet; The first main magnet and the second main magnet have the same size, the first magnetic conductive head and the second magnetic conductive head have the same size, and the radial sizes of the four are the same; A distance is left between the first magnetic conductive head and the second magnetic conductive head; The inner circumference of the second secondary magnet is in close contact with the outer circumference of the first main magnet and the first magnetic conductive head, the first side end surface of the second secondary magnet is flush with the end surface of the first main magnet facing away from the second main magnet, the second side end surface of the second secondary magnet is flush with the end surface of the first magnetic conductive head facing away from the first main magnet, and the second secondary magnet is aligned with the first secondary magnet in the radial direction; The inner circumference of the third secondary magnet is in close contact with the outer circumference of the second main magnet and the second magnetic conductive head, the first side end surface of the third secondary magnet is flush with the end surface of the second main magnet facing away from the first main magnet, the second side end surface of the third secondary magnet is flush with the end surface of the second magnetic conductive head facing away from the second main magnet, and the third secondary magnet is aligned with the fourth secondary magnet in the radial direction; The second secondary magnet has the same size as the third secondary magnet; The magnetization directions of the first secondary magnet and the third secondary magnet are both radially outward, the magnetization directions of the fourth secondary magnet and the second secondary magnet are both radially inward, and the magnetization directions of the first main magnet and the second main magnet are both in the direction from the first secondary magnet to the fourth secondary magnet; The rotor assembly further includes a yoke, which covers the inner circumference and two end surfaces of the overall contour of the first main magnet, the second main magnet, the first secondary magnet, the second secondary magnet, the third secondary magnet and the fourth secondary magnet; The magnet unit forms an arc-shaped vacant space, and the rotor assembly can be controlled to rotate so that the multiple magnetic refrigeration beds can enter and exit the arc-shaped vacant space, wherein the rotation axis of the rotor assembly, the central axis of the annular cylindrical space defined by the multiple magnet units, and the central axis of the annular cylindrical space arranged by the multiple magnetic refrigeration beds are on the same straight line.

2. The rotary magnetic refrigeration component according to claim 1, characterized in that: There are multiple yokes and they are arranged one by one corresponding to the magnet units. The yoke includes a first end plate, a second end plate and an inner plate that are connected as a whole. The same side end surfaces of the first secondary magnet, the first main magnet and the second secondary magnet are fixed on the first end plate, the same side end surfaces of the third secondary magnet, the second main magnet and the fourth secondary magnet are fixed on the second end plate, and the inner circumferential surfaces of the first secondary magnet and the inner circumferential surfaces of the fourth secondary magnet are fixed on the inner plate.

3. The rotary magnetic refrigeration component according to claim 2, characterized in that: The rotor assembly also includes a first baffle, a second baffle, a first bearing, a second bearing and a fixed sleeve; The fixed sleeve is cylindrical; The first end plate of the magnetic yoke is fixed on the first baffle; The first baffle is connected to the outer ring of the first bearing, and the inner ring of the first bearing is connected to the outer circumferential surface of the fixed sleeve; The second end plate of the magnetic yoke is fixed on the second baffle; The second baffle is connected to the bearing outer ring of the second bearing, and the bearing inner ring of the second bearing is connected to the outer circumferential surface of the fixed sleeve.

4. The rotary magnetic refrigeration component according to claim 3, characterized in that: The first baffle plate has a circular ring section and a plurality of arc sections extending radially outward from the ring section, and the arc sections are arranged in a one-to-one correspondence with the magnet units and are axially aligned with the corresponding magnet units; the second baffle plate has a circular ring section and a plurality of arc sections extending radially outward from the ring section, and the arc sections are arranged in a one-to-one correspondence with the magnet units and are axially aligned with the corresponding magnet units.

5. The rotary magnetic refrigeration component according to claim 3, characterized in that: The first baffle plate is fixedly connected to the magnet unit by gluing; the second baffle plate is fixedly connected to the magnet unit by gluing.

6. The rotary magnetic refrigeration component according to claim 1, characterized in that: The number of the magnet units is greater than or equal to 3.

7. The rotary magnetic refrigeration component according to claim 1, characterized in that: The magnetic yoke is made of soft magnetic material.

8. The rotary magnetic refrigeration component according to claim 1, characterized in that: The first magnetic conductive head and the second magnetic conductive head are made of FeCo alloy or FeNi alloy.

9. The rotary magnetic refrigeration component according to claim 1, characterized in that: The remanence and coercive force of the first main magnet, the second main magnet, the first secondary magnet, the second secondary magnet, the third secondary magnet, and the fourth secondary magnet are equal.

10. A magnetic refrigeration device, characterized in that: A rotary magnetic refrigeration component comprising the rotary magnetic refrigeration component according to any one of claims 1 to 9, wherein a plurality of magnetic refrigeration beds of the rotary magnetic refrigeration component are numbered in sequence along the circumferential direction, the cold end ports of the odd-numbered magnetic refrigeration beds are connected to the first cold end aggregation port, the hot end ports of the odd-numbered magnetic refrigeration beds are connected to the first hot end aggregation port, the cold end ports of the even-numbered magnetic refrigeration beds are connected to the second cold end aggregation port, the hot end ports of the even-numbered magnetic refrigeration beds are connected to the second hot end aggregation port, the odd-numbered magnetic refrigeration beds as a whole constitute a first refrigeration bed group, and the even-numbered magnetic refrigeration beds as a whole constitute a second refrigeration bed group; The magnetic refrigeration device also includes: a heat exchange fluid container, a water pump, a valve assembly, a refrigeration chamber and a radiator; The water pump, the heat exchange fluid container and the radiator are connected in series in sequence to form a first series branch; the first refrigeration bed group, the refrigeration chamber and the second refrigeration bed group are connected in series in sequence to form a second series branch; the valve assembly connects the two ends of the first series branch and the two ends of the second series branch to form a loop; wherein the flow direction of the heat exchange fluid in the first series branch is fixed, and the valve assembly is used to switch the flow direction of the heat exchange fluid in the second series branch.

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