A magnetic refrigeration device

Abstract

The present invention provides a magnetic refrigeration device, which includes: a stator assembly, including a yoke outer cylinder and at least two permanent magnets; a rotor assembly, and the rotor assembly includes an electromagnetic coil, and a rotating core is arranged on the inner circumference of the electromagnetic coil, and the electromagnetic coil can be powered to drive the rotor assembly to rotate; and a cold storage device is provided, and at least two magnetic working fluid cavities are provided between the inner wall and the outer wall of the cold storage device, and the magnetic working fluid cavity contains magnetic working fluid, and the cold storage device is connected to the rotor assembly and rotates as the rotor assembly rotates. Through the present invention, the two magnetic field generation modes of electromagnetic field and permanent magnetic field are combined, so that the strength of the magnetic field air gap is enhanced, and at the same time, the problems of large volume, high driving power consumption and low frequency of a simple permanent magnetic field generator are solved, and the problems of large heat generation and low energy consumption of a simple electromagnetic magnetic field generator are solved, so that the volume is reduced while the heat generation is reduced, the power consumption is reduced, and the energy efficiency of the system is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of magnetic refrigeration, and in particular relates to a magnetic refrigeration device. Background Art

[0002] According to statistics, nearly 20% of the global electricity consumption is used for refrigeration and air conditioning equipment. In recent years, with the rise in global temperatures and the increase in energy consumption, new green and environmentally friendly refrigeration technologies with no greenhouse gas potential have attracted much attention, and magnetic refrigeration has been rated by the US Department of Energy as one of the top 10 technologies most likely to replace compression refrigeration.

[0003] Although the efficiency of magnetic refrigeration can theoretically reach 50% to 60% of the efficiency of the Carnot cycle, which is about 30% higher than the traditional compression refrigeration method, in most magnetic refrigeration prototypes, the driving power source of the magnetic field source is different from that of the pump in the magnetic refrigeration system, and there are many solenoid valves and one-way valves in the magnetic refrigeration system, which reduces the efficiency and makes the piping layout complicated;

[0004] In the magnetic refrigeration prototype, the core magnet assembly, the cold storage assembly, and the magnetic refrigeration system are mutually influenced. Generally, a separate driving pump is used to drive the fluid to flow through the magnetized cold storage to absorb the heat released by the magnetic working medium and then flow through the hot end radiator. The fluid that returns to normal temperature flows through the unmagnetized cold storage to absorb the cold energy generated by the magnetic working medium and then flows through the cold end radiator to release the cold energy, thus forming a magnetic refrigeration cycle.

[0005] In previous patent schemes, the magnetic field generator of the magnetic refrigeration device is basically composed of a single permanent magnet or electromagnet. However, the permanent magnet magnetic field generator has the problems of large mass, large driving torque, and thus large power consumption. At the same time, since the air gap of the permanent magnet is small and the magnetic field strength cannot be changed, the flexibility and adjustability of the magnetic field are low, and there are obvious shortcomings when the control requirements are high. The magnetic field generator of a single electromagnet or electromagnetic coil has the problems of high heat generation, high power consumption, large size, low frequency, etc.

[0006] In terms of fluid management systems, previous magnetic refrigeration systems generally use a combination of a pump and a valve system for fluid management. However, this type of solution has problems such as high power consumption and unbalanced hot and cold blowing flows, resulting in low system heat exchange efficiency and reduced system refrigeration capacity.

[0007] In patent CN105849478A, in terms of magnetic circuit design, four permanent magnets and a magnetic yoke form a C-type magnetic circuit. The electromagnetic coil only provides suction to rotate the permanent magnet to a specific position, and the coil itself does not constitute a part of the magnetic circuit; in the flow system, the heat exchange fluid oscillates and circulates between the cold storage device and the cold / heat exchanger, and there is a problem of mixing cold and hot in the pipeline, resulting in loss of cooling capacity.

[0008] Since the magnetic field generators of the magnetic refrigeration devices in the prior art mostly simply use permanent magnets or electromagnetics, and the permanent magnet magnetic field generator has the problems of large size, high driving power consumption, and low frequency, and the electromagnetic magnetic field generator has the problems of high heat generation and low energy consumption, it is impossible to achieve compatibility between the two; the previous method of using a mechanical valve in conjunction with a hydraulic pump has the problem of high power consumption, and the mechanical valve is subjected to an oscillating torque and does not match the flow waveform of the pump, which makes the system have a flow imbalance problem in the two stages of cold and hot blowing, resulting in low heat exchange efficiency and low refrigeration capacity; the various sub-mechanism systems of the previous magnetic refrigeration device (such as a fluid drive mechanism, a magnetic field generator system, a heat exchanger system, etc.) are relatively independent, and each occupies a part of an independent space in structure, and there is no strong power connection in structure, so the overall structure size is large, which is not conducive to miniaturization and other technical problems, so the present invention studies and designs a magnetic refrigeration device. Summary of the invention

[0009] Therefore, the technical problem to be solved by the present invention is to overcome the problems of large size, high driving power consumption and low frequency of the magnetic field generator of the magnetic refrigeration device in the prior art using a simple permanent magnet magnetic field generator, and the problems of high heat generation and low energy consumption when using a simple electromagnetic magnetic field generator. It is impossible to solve the defects of large size and high heat generation at the same time, thereby providing a magnetic refrigeration device.

[0010] The present invention provides a magnetic refrigeration device, comprising:

[0011] A stator assembly, the stator assembly comprising a yoke outer cylinder and at least two permanent magnets arranged on the inner circumference of the yoke outer cylinder, wherein the at least two permanent magnets are spaced apart and distributed along the circumferential direction;

[0012] It also includes a rotor assembly, which is arranged on the inner periphery of the stator assembly of the cylindrical structure, and the rotor assembly includes at least two rotor poles distributed along the circumferential direction, an electromagnetic coil is wound between the two rotor poles, a rotating core is arranged on the inner periphery of the electromagnetic coil, and the electromagnetic coil can be energized to generate electromagnetic force with the permanent magnets distributed at intervals to drive the rotor assembly to rotate;

[0013] It also includes a cold accumulator, which is cylindrical and located between the stator assembly and the rotor assembly. There are at least two magnetic working fluid cavities between the inner wall and the outer wall of the cold accumulator, and the magnetic working fluid is accommodated in the magnetic working fluid cavity. The cold accumulator is connected to the rotor assembly and rotates integrally with the rotor assembly.

[0014] Preferably,

[0015] The plurality of electromagnetic coils are adjacent to each other and form a full circle, and adjacent electromagnetic coils are alternately connected to direct current; the cold storage device is a cylinder, the number of the magnetic working fluid cavities corresponds to the number of the electromagnetic coils, the plurality of magnetic working fluid cavities are adjacent to each other and form a full circle, and two adjacent magnetic working fluid cavities are separated by a partition.

[0016] Preferably,

[0017] The structures of the multiple permanent magnets are the same and are evenly distributed along the circumferential direction. The central angle of the gap between two adjacent permanent magnets is equal to the central angle of the permanent magnets; and / or the central angle of each electromagnetic coil is equal to that of each permanent magnet; and / or the central angle of each magnetic working fluid cavity is equal to that of each permanent magnet.

[0018] Preferably,

[0019] In the circumferential direction, there are four permanent magnets, namely the first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet, and there are intervals between two adjacent permanent magnets; and / or, in the circumferential direction, there are eight rotor poles and eight electromagnetic coils, and the electromagnetic coils are respectively the first electromagnetic coil, the second electromagnetic coil, the third electromagnetic coil, the fourth electromagnetic coil, the fifth electromagnetic coil, the sixth electromagnetic coil, the seventh electromagnetic coil and the eighth electromagnetic coil; and / or, in the circumferential direction, there are eight magnetic working fluid cavities, namely the first magnetic working fluid cavity, the second magnetic working fluid cavity, the third magnetic working fluid cavity, the fourth magnetic working fluid cavity, the fifth magnetic working fluid cavity, the sixth magnetic working fluid cavity, the seventh magnetic working fluid cavity and the eighth magnetic working fluid cavity.

[0020] Preferably,

[0021] A heat exchange fluid can also flow through the magnetic working medium cavity, and a blocking portion is provided at the axial end of the magnetic working medium cavity to block the passage of the magnetic working medium and allow the heat exchange fluid to pass through.

[0022] Preferably,

[0023] A first cold storage diverter is further provided at one axial end of the cold storage device, the magnetic working medium cavity is communicated with the interior of the first cold storage diverter, and the interior of the first cold storage diverter is provided with a first hot annular channel for merging a plurality of heat exchange fluids after being heated and released by the magnetic working medium, and the interior of the first cold storage diverter is provided with a first cold annular channel for merging a plurality of heat exchange fluids after being cooled and absorbed by the magnetic working medium; and / or,

[0024] A second cold storage diverter device is also provided at the other axial end of the cold storage device, the magnetic working fluid cavity is connected to the interior of the second cold storage diverter device, and the interior of the second cold storage diverter device is provided with a second hot annular channel for merging a plurality of heat exchange fluids after being heated and released by the magnetic working fluid, and the interior of the second cold storage diverter device is provided with a second cold annular channel for merging a plurality of heat exchange fluids after being cooled and absorbed by the magnetic working fluid.

[0025] Preferably,

[0026] The magnetic refrigeration device further includes a cold end heat exchanger and a hot end heat exchanger, and the first cold storage device splitter has a first hot channel and a first cold channel on the side away from the cold storage device, the first hot channel is connected to the first hot annular channel, the first cold channel is connected to the first cold annular channel, the first hot channel is connected to the inlet of the hot end heat exchanger, and the first cold channel is connected to the outlet of the hot end heat exchanger; and / or,

[0027] The second cold storage device diverter device also has a second hot channel and a second cold channel on the side away from the cold storage device, the second hot channel is connected to the second hot annular channel, the second cold channel is connected to the second cold annular channel, the second hot channel is connected to the outlet of the cold end heat exchanger, and the second cold channel is connected to the inlet of the cold end heat exchanger.

[0028] Preferably,

[0029] The hot end heat exchanger is also covered with a hot end heat dissipation cover and / or the cold end heat exchanger is also covered with a cold end heat dissipation cover.

[0030] Preferably,

[0031] A first cold accumulator end cover is further provided between the cold accumulator and the first cold accumulator flow diversion device, and a plurality of first communication channels are provided inside the first cold accumulator end cover, corresponding one-to-one to the plurality of magnetic working fluid cavities, and one end of the first communication channel is communicated with the magnetic working fluid cavity, and the other end is communicated with the first hot annular channel and / or the first cold annular channel of the first cold accumulator flow diversion device; and / or,

[0032] A second cold storage end cover is also arranged between the cold storage device and the second cold storage flow diversion device, and a plurality of second connecting channels are arranged inside the second cold storage end cover, corresponding one-to-one to the plurality of magnetic working fluid cavities, and one end of the second connecting channel is connected to the magnetic working fluid cavity, and the other end is connected to the second hot annular channel and / or the second cold annular channel of the second cold storage flow diversion device.

[0033] Preferably,

[0034] A rotating shaft is arranged inside the rotating core, and the rotating shaft rotates together with the rotating core.

[0035] The magnetic refrigeration device also includes a plunger pump assembly, which can pump heat exchange fluid. The plunger pump assembly includes a pump rotor and a pump stator. The pump stator is arranged on the outer periphery of the pump rotor, and the rotating shaft is also passed through the axial hole inside the pump rotor to drive the pump rotor to rotate.

[0036] Preferably,

[0037] The pump rotor is provided with a plunger and a plunger cavity for accommodating the plunger to perform reciprocating motion therein, the plunger cavity extending in the radial direction of the pump rotor, the radial outer end of the plunger abutting against the inner circumferential wall of the pump stator, and in the cross section, the inner circumferential wall of the pump stator is a curve, the curve has a far point farthest from the axis of the pump rotor and a near point closest to the axis of the pump rotor, the far point to the near point is a smooth transition, and as the pump rotor rotates, the plunger is driven by the inner circumferential wall curve of the pump stator to perform reciprocating motion in the plunger cavity.

[0038] Preferably,

[0039] In the circumferential direction, there are eight plungers, namely the first plunger, the second plunger, the third plunger, the fourth plunger, the fifth plunger, the sixth plunger, the seventh plunger and the eighth plunger, and there are also eight plunger cavities, which correspond to the plungers one by one; the curve includes four arc segments of the same shape, each arc segment includes two near points and one far point, and the intersection position of adjacent arc segments is the near point.

[0040] Preferably,

[0041] It also includes a pump diverter, which is connected to one end of the pump rotor of the plunger pump assembly, and the pump diverter has a third cold channel and a third hot channel on the side away from the pump rotor, and the pump diverter has more than two fourth cold channels and more than two fourth hot channels on the side opposite to the pump rotor, and one end of more than two fourth cold channels can be connected to the third cold channel, and the other end is connected to a plurality of plunger cavities arranged at intervals; one end of more than two fourth hot channels can be connected to the third hot channel, and the other end is connected to a plurality of plunger cavities arranged at intervals.

[0042] Preferably,

[0043] A third cold annular diverter channel is provided inside the pump diverter, one side of the third cold annular diverter channel is connected to the third cold channel, and the other side is connected to more than two fourth cold channels; a third hot annular diverter channel is provided inside the pump diverter, one side of the third hot annular diverter channel is connected to the third hot channel, and the other end is connected to more than two fourth hot channels.

[0044] Preferably,

[0045] It also includes a hot-end heat exchanger and a cold-end heat exchanger, the third cold channel is connected to the cold-end heat exchanger, and / or the third hot channel is connected to the hot-end heat exchanger; and / or the plunger cavity connected to the fourth cold channel and the plunger cavity connected to the fourth hot channel are alternately arranged.

[0046] Preferably,

[0047] There are four fourth cold channels, which are evenly arranged along the circumference; there are four fourth hot channels, which are evenly arranged along the circumference; and the fourth cold channels and the fourth hot channels are alternately and spaced apart in the circumference.

[0048] Preferably,

[0049] The third cold channel is located radially inside the third hot channel, the third annular flow-dividing channel is located radially inside the third annular flow-dividing channel, and the fourth cold channel is located radially inside the fourth hot channel.

[0050] Preferably,

[0051] An annular boss is also provided on one side of the pump diverter where the third cold channel and the third hot channel are provided, the third cold annular diverter channel axially extends to the inside of the annular boss, and the fourth cold channel is provided on the radial outer periphery of the annular boss and faces radially outward;

[0052] The fourth hot channel is opened on the pump diverter and is provided with a side of the annular boss and avoids the annular boss. The fourth hot channel is opened in the axial direction. The fourth hot channel and the fourth cold channel are alternately arranged in the circumferential direction.

[0053] Preferably,

[0054] A cold blocking mechanism is also provided on the annular boss and located between two adjacent fourth cold channels so as to extend radially outward; a heat blocking mechanism is also provided on the pump diverter and located between two adjacent fourth hot channels so as to extend axially.

[0055] Preferably,

[0056] The pump rotor also has a fifth channel radially opened inside and a sixth channel axially opened inside, one end of the sixth channel is connected to the fifth channel, and the other end is connected to the plunger cavity, the fourth hot channel can be directly connected to the fifth channel and then connected to the plunger cavity; the fourth cold channel can be connected to the fifth channel and then connected to the plunger cavity through the sixth channel; and the fourth hot channel and the fourth cold channel are alternately connected to the plunger cavity.

[0057] The magnetic refrigeration device provided by the present invention has the following beneficial effects:

[0058] 1. The present invention provides a stator assembly including circumferentially spaced permanent magnets, a rotor assembly including rotor poles and electromagnetic coils wound on the rotor poles, and a cold storage device is provided between the stator assembly and the rotor assembly, which can rotate with the rotor assembly, and generate electromagnetic force between the electromagnetic coils and the spaced permanent magnets to drive the rotor assembly to rotate, and at the same time drive the cold storage device to rotate as a whole, so that the magnetic working medium cavity is magnetized and demagnetized, so that the magnetic working medium can be magnetized to release heat and demagnetized to absorb heat, thereby forming effective magnetic refrigeration, and combining the two magnetic field generation modes of electromagnetic field and permanent magnetic field to effectively provide an electromagnetic-permanent magnetic field generator, so that the strength of the magnetic field air gap is enhanced, and the magnetic field strength and frequency are adjustable. At the same time, the problems of large volume, high driving power consumption and low frequency of a simple permanent magnetic field generator are solved, and the problems of large heat generation and low energy consumption of a simple electromagnetic magnetic field generator are solved, so that the volume is reduced while the heat generation is reduced, the power consumption is reduced, and the energy efficiency of the system is improved;

[0059] 2. The present invention also makes the rotating shaft of the plunger pump assembly and the rotating shaft of the rotor assembly the same shaft, so that the rotating shaft is driven to rotate by the stator assembly while driving the pump rotor of the plunger pump assembly to rotate as a whole. The magnetic field subsystem and the fluid drive subsystem are structurally consistent and coupled, so that the magnetic field waveform and the flow waveform can be well synchronized and matched, making the system flow more balanced and avoiding fluid impact of the mechanical valve, solving the problem of unbalanced hot and cold blowing flow and the problem of large pressure impact when switching the previous mechanical valve; the electromagnetic coil of the magnetic field generator is also used to drive the fluid drive mechanism (providing driving power for the plunger mechanism), eliminating the drive pump and drive motor of the previous magnetic refrigeration device, greatly reducing the power consumption of the whole machine, and making the whole machine structure more compact and miniaturized. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 It is a three-dimensional exploded structural diagram of the magnetic refrigeration device of the present invention;

[0061] Figure 1a This is a three-dimensional structural diagram of the magnetic refrigeration device of the present invention after assembly;

[0062] Figure 2 It is an axial schematic diagram of the stator and rotor assembly and the cold storage device part of the magnetic refrigeration device of the present invention;

[0063] Figure 3 is a circuit structure diagram of the rotor coil of the magnetic refrigeration device of the present invention;

[0064] Figure 4 is a longitudinal cross-sectional view of a cold storage device of a magnetic refrigeration device of the present invention;

[0065] Figure 5 is an axial schematic diagram of a plunger pump assembly of a magnetic refrigeration device of the present invention;

[0066] Figure 6 is a longitudinal sectional view of a plunger pump assembly of a magnetic refrigeration device of the present invention;

[0067] Figure 7a is a front structural diagram of a pump diverter of a magnetic refrigeration device of the present invention;

[0068] Figure 7b is a back structural diagram of a pump diverter of a magnetic refrigeration device of the present invention;

[0069] Figure 8 It is a system structure diagram of the magnetic refrigeration device of the present invention.

[0070] The reference numerals in the figure are as follows:

[0071] 100, stator assembly; 101, first permanent magnet; 102, second permanent magnet; 103, third permanent magnet; 104, fourth permanent magnet; 200, rotor assembly; 201, rotor pole; 211, first electromagnetic coil; 212, second electromagnetic coil; 213, third electromagnetic coil; 214, fourth electromagnetic coil; 215, fifth electromagnetic coil; 216, sixth electromagnetic coil; 217, seventh electromagnetic coil; 218, eighth electromagnetic coil; 2 ... Dynamic core; 310, cold storage device; 311, first magnetic working fluid cavity; 312, second magnetic working fluid cavity; 313, third magnetic working fluid cavity; 314, fourth magnetic working fluid cavity; 315, fifth magnetic working fluid cavity; 316, sixth magnetic working fluid cavity; 317, seventh magnetic working fluid cavity; 318, eighth magnetic working fluid cavity; 320, first cold storage device end cover; 330, second cold storage device end cover; 340, first cold storage device flow divider; 341, first hot channel; 342, first cold channel; 35 0, second cold storage device flow divider; 351, second hot channel; 352, second cold channel; 400, plunger pump assembly; 410, pump stator; 411, far point; 412, near point; 420, plunger; 421, first plunger; 422, second plunger; 423, third plunger; 424, fourth plunger; 425, fifth plunger; 426, sixth plunger; 427, seventh plunger; 428, eighth plunger; 429, plunger cavity; 430, pump rotor; 4 31. Sixth channel; 432. Fifth channel; 440. Pump diverter; 441. Third cold channel; 442. Third hot channel; 443. Fourth cold channel; 444. Fourth hot channel; 445. Cold blocking mechanism; 446. Hot blocking mechanism; 447. Annular boss; 500. Hot end heat exchanger; 501. Hot end heat sink; 600. Cold end heat exchanger; 601. Cold end heat sink; 700. Rotating shaft; 805. Water storage tank; 900. Current commutator. DETAILED DESCRIPTION

[0072] like Figure 1-8 As shown, the present invention provides a magnetic refrigeration device, which includes:

[0073] A stator assembly 100, the stator assembly 100 comprising a yoke outer cylinder 110 and at least two permanent magnets disposed on the inner circumference of the yoke outer cylinder 110, wherein the at least two permanent magnets are spaced apart and distributed along the circumferential direction;

[0074] The invention also includes a rotor assembly 200, which is arranged on the inner periphery of the stator assembly 100 of the cylindrical structure, and the rotor assembly 200 includes at least two rotor poles 201 distributed along the circumferential direction, an electromagnetic coil is wound between the two rotor poles 201, and a rotating core 220 is arranged on the inner periphery of the electromagnetic coil. The electromagnetic coil can be energized to generate electromagnetic force with the permanent magnets distributed at intervals to drive the rotor assembly to rotate;

[0075] It also includes a cold storage device 310, which is cylindrical and located between the stator assembly 100 and the rotor assembly 200. There are at least two magnetic working fluid cavities between the inner wall and the outer wall of the cold storage device 310, and the magnetic working fluid is accommodated in the magnetic working fluid cavity. The cold storage device 310 is connected to the rotor assembly 200 and rotates integrally with the rotation of the rotor assembly 200.

[0076] The present invention provides a stator assembly including circumferentially spaced permanent magnets, a rotor assembly including rotor poles and electromagnetic coils wound on the rotor poles, and a cold storage device is provided between the stator assembly and the rotor assembly, so that the stator assembly can rotate together with the rotor assembly, and the electromagnetic coil is energized to generate electromagnetic force between the electromagnetic coil and the spaced permanent magnets to drive the rotor assembly to rotate, and at the same time drive the cold storage device to rotate as a whole, so that the magnetic working medium cavity is magnetized and demagnetized, so that the magnetic working medium can be magnetized to release heat and demagnetized to absorb heat, thereby forming effective magnetic refrigeration, and combining the two magnetic field generation modes of electromagnetic field and permanent magnetic field. The invention effectively provides an electromagnetic-permanent magnet magnetic field generator, wherein the electromagnetic coil rotor and the permanent magnet stator constitute a Halbach magnetic circuit, and the electromagnetic coil provides a power source for magnetic field conversion and piston movement, so that the strength of the magnetic field air gap is enhanced (while also having the function of enhancing the magnetic field strength), and has adjustable field strength and adjustable frequency functions, and solves the problems of large volume, high driving power consumption and low frequency of a simple permanent magnet magnetic field generator, and the problems of high heat generation and low energy consumption of a simple electromagnetic magnetic field generator, so that the volume is reduced while the heat generation is reduced, the power consumption is reduced, and the energy efficiency of the system is improved.

[0077] The magnetic refrigeration device of the present invention comprises a hybrid magnetic field source component (stator assembly 100, rotor assembly 200), a cold storage component (cold storage component 310, cold storage end cover, cold storage flow divider), an inner curve plunger pump component 400 (pump stator 410, pump rotor 430, plunger 420, pump flow divider 440), a hot end heat exchanger component (hot end heat exchanger 500, hot end heat dissipation cover 501), and a cold end heat exchanger component (cold end heat exchanger 600, cold end heat dissipation cover 601); the magnetic refrigeration device can be used for refrigeration and freezing equipment such as refrigerators and air conditioners, and can be used in series and parallel combinations;

[0078] like Figure 2As shown, the magnetic field source is introduced. The rotor assembly 200 of the magnetic field source is composed of 8 electromagnetic coils 211-218 and 8 rotor poles 201-208; the stator assembly 100 of the magnetic field source is composed of 8 permanent magnets 101-104 and a yoke outer cylinder 110; the first electromagnetic coil 211 of the magnetic field source is wound around the rotor pole 201, and when the first electromagnetic coil 211 is energized, it will form a magnetic circuit with the first permanent magnet 101, thereby generating a magnetic induction intensity greater than 1T at the air gap, providing a magnetic field source for the magnetocaloric effect of the magnetic medium; the pole is composed of high The magnetic permeability material is composed of, for example, electrical pure iron, silicon steel sheet; the cold storage device 310 comprises 8 magnetic working fluid cavities, the first magnetic working fluid cavity 311 and the three separated cold storage devices form a group, and the rest form another group, and the two groups of cold storage devices are always in opposite states, that is, one group enters the magnetic field and the other group leaves the magnetic field; the cold storage devices are separated by partitions; the electromagnetic coils 211, 213, 215, 217 form a group L1, and the coils 212, 214, 216, 218 form another group L2, and the two groups of coils are alternately connected to direct current; Figure 2 As shown, when power is turned on, the corresponding rotor poles 201, 203, 205, 207 will be magnetized, and torque will be generated under the attraction of the permanent magnets 101, 102, 103, 104 to rotate the rotor assembly 200 accordingly. The magnitude of the torque, i.e., the rotation speed, can be adjusted by the magnitude of the current; the cold storage device 310 is connected to the rotor assembly 200 of the magnetic field source through the rotating shaft 700, ensuring that the two rotate coaxially and simultaneously; Figure 2 The position is the initial position. Taking the second magnetic working fluid cavity 312 as an example, in order to make it have two stages of magnetization and demagnetization, the first electromagnetic coil 211 is first energized so that the rotor assembly 200 drives the second magnetic working fluid cavity 312 to rotate 45°. At this time, the second magnetic working fluid cavity 312 is completely covered by the second permanent magnet 102. At this stage, the second magnetic working fluid cavity 312 is in the magnetization stage. Then the second electromagnetic coil 212 is powered off, and the first electromagnetic coil 211 is powered on, thereby driving the second magnetic working fluid cavity 312 to continue to rotate 45°. At this time, the second magnetic working fluid cavity 312 completely leaves the magnetic field, completing a demagnetization process.

[0079] Preferably,

[0080] The plurality of electromagnetic coils are adjacent to each other and form a full circle, and the adjacent electromagnetic coils are alternately connected to direct current; the cold storage device 310 is a cylinder, the number of the magnetic working fluid chambers corresponds to the number of the electromagnetic coils, the plurality of magnetic working fluid chambers are adjacent to each other and form a full circle, and the adjacent two magnetic working fluid chambers are separated by a partition. This is the preferred arrangement form of the plurality of electromagnetic coils of the present invention. By forming a full circle, the electromagnetic coils can cut the magnetic lines of force between the permanent magnets distributed at intervals when rotating, which is achieved by alternating current (i.e., direct current is passed through the electromagnetic coils opposite to the permanent magnets, and no current is passed through the electromagnetic coils not opposite to each other), thereby generating an alternating magnetic field to effectively drive the coil rotor to rotate. At the same time, the number of magnetic working fluid chambers is consistent with the electromagnetic coils and forms a full circle, which can produce intermittent magnetization and demagnetization of the magnetic working fluid chambers, and magnetic heating and magnetic cooling occur in the two adjacent magnetic working fluid chambers respectively. The partition effectively seals the adjacent magnetic working fluid chambers so that they work independently.

[0081] For the coil rotor, in order to achieve the coil alternately connected to the DC power, the coil is connected to the PLC analog output module through the current commutator 900 and the brush. The circuit is as follows Figure 3 As shown; the power supply is composed of a PLC analog module and a voltage amplifier.

[0082] Preferably,

[0083] The structures of the plurality of permanent magnets are the same and are evenly distributed along the circumference. The central angle of the gap between two adjacent permanent magnets is equal to the central angle of the permanent magnets; and / or, the central angle of each electromagnetic coil is equal to the central angle of each permanent magnet; and / or, the central angle of each magnetic working fluid cavity is equal to the central angle of each permanent magnet. This is the preferred arrangement form of the plurality of permanent magnets of the present invention, so that they are evenly distributed in the circumference, the central angle of the gap between the permanent magnets is equal to the central angle of the permanent magnet, and the central angle of each electromagnetic coil is equal to the permanent magnet, and the central angle of the magnetic working fluid cavity is equal to the permanent magnet. When the coil and the magnetic working fluid cavity rotate, a uniform magnetic field is generated between them and the permanent magnet, and the magnetization intensity and demagnetization intensity are equal, so that the magnetic refrigeration device can output continuous and uniform heat or cold to the outside, ensuring the stability and reliability of the system.

[0084] Preferably,

[0085] In the circumferential direction, there are four permanent magnets, namely the first permanent magnet 101, the second permanent magnet 102, the third permanent magnet 103 and the fourth permanent magnet 104, and there are intervals between two adjacent permanent magnets; and / or, in the circumferential direction, there are eight rotor poles 201 and eight electromagnetic coils, namely the first electromagnetic coil 211, the second electromagnetic coil 212, the third electromagnetic coil 213, the fourth electromagnetic coil 214, the fifth electromagnetic coil 215, the sixth electromagnetic coil 216, the seventh electromagnetic coil 217 and the eighth electromagnetic coil 218; and / or, in the circumferential direction, there are eight magnetic working fluid cavities, namely the first magnetic working fluid cavity 311, the second magnetic working fluid cavity 312, the third magnetic working fluid cavity 313, the fourth magnetic working fluid cavity 314, the fifth magnetic working fluid cavity 315, the sixth magnetic working fluid cavity 316, the seventh magnetic working fluid cavity 317 and the eighth magnetic working fluid cavity 318. This is the preferred number and structural form of the permanent magnets, electromagnetic coils, rotor poles and magnetic working fluid cavities of the present invention, that is, during one rotation of the electromagnetic coils and the magnetic working fluid cavities, four electromagnetic coils are energized to generate a magnetic field, four magnetic working fluid cavities are magnetized to release heat, and four magnetic working fluid cavities are demagnetized to absorb heat.

[0086] Preferably,

[0087] A heat exchange fluid can also flow through the magnetic working fluid cavity, and a blocking portion (preferably a filter) is also provided at the axial end of the magnetic working fluid cavity, which can block the passage of the magnetic working fluid and allow the heat exchange fluid to pass through. By providing the blocking portion at the axial end of the magnetic working fluid cavity, the magnetic working fluid can be effectively blocked from flowing out of the magnetic working fluid cavity, while the heat exchange fluid is allowed to flow into and out of the magnetic working fluid cavity, so that the magnetic working fluid can continuously complete the alternating process of magnetization and demagnetization in the magnetic working fluid cavity, thereby continuously transferring heat to the outside or continuously transferring cold to the outside through the flow of the heat exchange fluid.

[0088] Preferably,

[0089] A first cold storage diverter 340 (i.e., a first diverter mechanical valve) is further provided at one axial end of the cold storage 310, the magnetic working medium chamber is communicated with the interior of the first cold storage diverter 340, and the interior of the first cold storage diverter 340 has a first hot annular channel (not shown) for merging a plurality of heat exchange fluids after being heated and released by the magnetic working medium, and the interior of the first cold storage diverter 340 also has a first cold annular channel (not shown) for merging a plurality of heat exchange fluids after being cooled and absorbed by the magnetic working medium; and / or,

[0090] A second cold storage diversion device 350 (i.e., a second diversion mechanical valve) is also provided at the other axial end of the cold storage device 310, the magnetic working fluid chamber is connected to the interior of the second cold storage diversion device 350, and the interior of the second cold storage diversion device 350 has a second hot annular channel (not shown) for merging a plurality of heat exchange fluids after being heated and released by the magnetic working fluid, and the interior of the second cold storage diversion device 350 also has a second cold annular channel (not shown) for merging a plurality of heat exchange fluids after being cooled and absorbed by the magnetic working fluid.

[0091] This is a further preferred structural form of the present invention. Through the first cold storage diverter device, the fluid flowing out of one axial end of the cold storage device can be merged and merged into one path and then discharged to the hot end heat exchanger for heat release or discharged to the cold end heat exchanger for heat absorption, or through the first cold storage diverter device, the fluid flowing into one axial end of the cold storage device can be diverted, and the fluid flowing into one path can be diverted into multiple paths and then flowed inwardly to the magnetic working fluid cavity to absorb the heat of the magnetic working fluid or absorb the cold of the magnetic working fluid, and through the second cold storage diverter device, the fluid flowing out of the other axial end of the cold storage device can be merged and merged into one path and then discharged outwardly. The fluid is discharged to the hot end heat exchanger for heat release or to the cold end heat exchanger for heat absorption, or the cold storage device can divert the fluid flowing into the other axial end of the cold storage device, and divert the fluid flowing in one way into multiple ways and then flow inward to the magnetic working fluid cavity to absorb the heat of the magnetic working fluid or absorb the cold of the magnetic working fluid; the first hot annular channel and the second hot annular channel are respectively used to merge multiple heat exchange fluids after being heated and released by the magnetic working fluid to the flow channel on the other side, and the first cold annular channel and the second cold annular channel are respectively used to merge multiple heat exchange fluids after being cooled and absorbed by the magnetic working fluid to the flow channel on the other side.

[0092] Since the cold storage device 310 rotates with the shaft, in order to ensure that the fluid flowing through the magnetized bed of the cold storage device 310 always flows to the hot end when the cold storage device 310 is magnetized, and the fluid flowing through the magnetized bed always flows to the cold end when the cold storage device 310 is demagnetized, a flow dividing device (a first cold storage device flow dividing device 340 and a second cold storage device flow dividing device 350) is provided at both ends of the cold storage device 310; Figure 4 To explain:

[0093] The first magnetic working fluid cavity 311 and the fifth magnetic working fluid cavity 315 are filled with magnetic working fluids in spherical or lamellar shapes; the Curie temperatures of the magnetic working fluids are arranged longitudinally with a gradient change; when the bed (the first magnetic working fluid cavity 311 and the fifth magnetic working fluid cavity 315) is demagnetized, the fluid starts from the plunger cavity 429 of the inner curve plunger pump, flows through the pipeline to the first cold channel 342, and then flows through the first cold storage device diversion device 340 to the magnetic cold storage device (the first magnetic working fluid cavity 311 and the fifth magnetic working fluid cavity 315), and finally leaves from the second cold channel 352 to the cold end heat exchanger 600; when the bed (the first magnetic working fluid cavity 311 and the fifth magnetic working fluid cavity 315) is magnetized, the fluid enters the cold storage bed from the hot channel 351, and then leaves the cold storage bed from the first hot channel 341 to reach the hot end heat exchanger, and finally returns to the plunger pump assembly 400.

[0094] Preferably,

[0095] The magnetic refrigeration device further includes a hot end heat exchanger 500 and a cold end heat exchanger 600. The first cold storage device flow divider 340 further includes a first hot channel 341 and a first cold channel 342 on a side away from the cold storage device 310. The first hot channel 341 is connected to the first hot annular channel, and the first cold channel is connected to the first cold annular channel. The first hot channel 341 is connected to the inlet of the hot end heat exchanger 500, and the first cold channel 342 is connected to the outlet of the hot end heat exchanger 500; and / or,

[0096] The side of the second cold storage device diverter 350 facing away from the cold storage device 310 also has a second hot channel 351 and a second cold channel 352, the second hot channel 351 is connected to the second hot annular channel, the second cold channel is connected to the second cold annular channel, the second hot channel 351 is connected to the outlet of the cold end heat exchanger 600, and the second cold channel 352 is connected to the inlet of the cold end heat exchanger 600.

[0097] The first cold channel can be connected to the first cold annular channel, and the first hot channel can be connected to the first hot annular channel. The first cold channel and the first hot channel are respectively located on the side of the cold accumulator opposite to the first cold accumulator shunt device, so as to guide the heat exchange fluid out of the cold accumulator to the hot-end heat exchanger, or to introduce the heat exchange fluid from the hot-end heat exchanger into the magnetic working fluid cavity of the cold accumulator after heat exchange; the second cold channel can be connected to the second cold annular channel, and the second hot channel can be connected to the second hot annular channel. The second cold channel and the second hot channel are respectively located on the side of the cold accumulator opposite to the second cold accumulator shunt device, so as to guide the heat exchange fluid out of the cold accumulator to the cold-end heat exchanger, or to introduce the heat exchange fluid from the cold-end heat exchanger into the magnetic working fluid cavity of the cold accumulator after heat exchange.

[0098] Preferably,

[0099] The hot end heat exchanger 500 is also covered with a hot end heat dissipation cover 501 and / or the cold end heat exchanger 600 is also covered with a cold end heat dissipation cover 601. The present invention can improve the heat dissipation effect through the hot end heat dissipation cover and the cold end heat dissipation cover.

[0100] Preferably,

[0101] A first cold storage end cover 320 is further provided between the cold storage 310 and the first cold storage flow diverter 340, and a plurality of first communication channels are provided inside the first cold storage end cover 320, corresponding one-to-one to the plurality of magnetic working fluid cavities, and one end of the first communication channel is connected to the magnetic working fluid cavity, and the other end is connected to the first hot annular channel and / or the first cold annular channel of the first cold storage flow diverter 340; and / or,

[0102] A second cold storage end cover 330 is also arranged between the cold storage 310 and the second cold storage diverter device 350, and a plurality of second connecting channels (not shown) are arranged inside the second cold storage end cover 330, corresponding one-to-one to the plurality of magnetic working fluid cavities, and one end of the second connecting channel (not shown) is connected to the magnetic working fluid cavity, and the other end is connected to the second hot annular channel and / or the second cold annular channel of the second cold storage diverter device 350.

[0103] This is a further preferred structural form of the present invention. Through the arrangement of the first cold accumulator end cover and the second cold accumulator end cover, the first cold accumulator end cover can be arranged between the first cold accumulator diverter device and the cold accumulator, and is used to guide the heat exchange fluid in the magnetic working fluid cavity to the first cold accumulator diverter device, or to introduce the heat exchange fluid in the first cold accumulator diverter device into the magnetic working fluid cavity. The second cold accumulator end cover can be arranged between the second cold accumulator diverter device and the cold accumulator, and is used to guide the heat exchange fluid in the magnetic working fluid cavity to the second cold accumulator diverter device, or to introduce the heat exchange fluid in the second cold accumulator diverter device into the magnetic working fluid cavity.

[0104] Preferably,

[0105] The rotating core 220 is provided with a rotating shaft 700 inside, and the rotating shaft 700 rotates together with the rotating core 220.

[0106] The magnetic refrigeration device also includes a plunger pump assembly 400, and the plunger pump assembly 400 is capable of pumping heat exchange fluid. The plunger pump assembly 400 includes a pump rotor 430 and a pump stator 410. The pump stator 410 is arranged on the outer periphery of the pump rotor 430, and the rotating shaft 700 is also penetrated into the axial hole inside the pump rotor 430 to drive the pump rotor 430 to rotate.

[0107] The present invention also uses the rotating shaft of the plunger pump assembly and the rotating shaft of the rotor assembly as the same shaft, so that the rotating shaft is driven to rotate by the stator assembly while driving the pump rotor of the plunger pump assembly to rotate as a whole, and the magnetic field subsystem and the fluid drive subsystem are coupled in structure consistency, so that the magnetic field waveform and the flow waveform can be well synchronized, making the system flow more balanced and avoiding the fluid impact of the mechanical valve, solving the problem of unbalanced cold and hot blow flow and the problem of large pressure impact of the previous mechanical valve when switching; the electromagnetic coil of the magnetic field generator is also used to drive the fluid drive mechanism (providing driving power for the plunger mechanism), canceling the driving pump and driving motor of the previous magnetic refrigeration device, greatly reducing the power consumption of the whole machine, and making the whole machine structure more compact and miniaturized. The above-mentioned means of the present invention allow the magnetization, demagnetization and magnetic refrigeration flow system of the cold storage device to achieve synchronous matching in the magnetic field waveform and the flow waveform, while reducing the system power consumption, improving the system refrigeration capacity, simplifying the structure of the magnetic refrigeration equipment, improving the air gap magnetic field strength while simplifying the pipeline system, and ensuring the synchronous matching of the magnetic field waveform and the flow waveform.

[0108] The plunger pump component 400 provides a fluid power source for the magnetic refrigeration system flow path; Figure 5 Description: The fluid can be a mixture of 30% ethylene glycol and 70% pure water or other heat transfer fluids with good thermal conductivity; the plunger pump assembly 400 is connected to the rotor assembly 200 through the rotating shaft 700, and the rotation of the rotor is consistent with the rotation of the plunger pump assembly 400; the first plunger 421, the third plunger 423, the fifth plunger 425, and the seventh plunger 427 are a group, and the second plunger 422, the fourth plunger 424, the sixth plunger 426, and the eighth plunger 428 are another group, and the adjacent plungers in the same group are arranged in a 90° circle; Figure 4 As shown, when the pump rotor 430 rotates clockwise, it drives the plunger 420 to move along the inner curve, and the plunger compresses the fluid in the piston and drives it to flow toward the cold storage device 310; the pump rotor 430 also drives the plunger 420 to move along the inner curve, driving the fluid in the cold storage device 310 to flow into the plunger.

[0109] Preferably,

[0110] The pump rotor 430 is provided with a plunger 420 and a plunger cavity 429 for accommodating the plunger 420 to perform reciprocating motion therein. The plunger cavity 429 extends in the radial direction of the pump rotor 430. The radial outer end of the plunger 420 abuts against the inner circumferential wall of the pump stator 410. In the cross section, the inner circumferential wall of the pump stator 410 is a curve. The curve has a far point 411 farthest from the axis of the pump rotor 430 and a near point 412 closest to the axis of the pump rotor 430. The far point 411 to the near point 412 is a smooth transition. As the pump rotor 430 rotates, the plunger 420 is driven by the inner circumferential wall curve of the pump stator 410 to perform reciprocating motion in the plunger cavity 429. This is the preferred structural form of the plunger pump assembly of the present invention, that is, through the form of the plunger and the plunger cavity and through the curved inner wall of the pump stator of the curved plunger pump, the plunger can be pushed when the plunger rotor rotates, so that the plunger completes reciprocating motion in the plunger cavity to achieve the effect of pumping out the heat exchange fluid or pumping in the heat exchange fluid.

[0111] Preferably,

[0112] In the circumferential direction, there are eight plungers, namely the first plunger 421, the second plunger 422, the third plunger 423, the fourth plunger 424, the fifth plunger 425, the sixth plunger 426, the seventh plunger 427 and the eighth plunger 428, and there are also eight plunger cavities 429, which correspond one to one with the plungers 420; the curve includes four arc segments of the same shape, each arc segment includes two near points 412 and one far point 411, and the intersection position of adjacent arc segments is the near point 412. This is the preferred number of plungers and the preferred number of plunger cavities of the present invention, which can make 4 spaced plungers be compressed at the same time and 4 spaced plungers be expanded at the same time to complete the functions of interval pumping and pumping. The curve is an arc segment with a near point and a far point, which can make the plunger be smoothly compressed or expanded in the process of rotating with the rotor. The plunger is expanded in the plunger cavity during the process of moving from the near point to the far point, and the plunger is compressed in the plunger cavity during the process of moving from the far point to the near point.

[0113] Preferably,

[0114] It also includes a pump diverter 440, and the pump diverter 440 is connected to one end of the pump rotor 430 of the plunger pump assembly. The pump diverter 440 has a third cold channel 441 and a third hot channel 442 on the side away from the pump rotor 430, and the pump diverter 440 has more than two fourth cold channels 443 and more than two fourth hot channels 444 on the side opposite to the pump rotor 430, and one end of the more than two fourth cold channels 443 can be connected to the third cold channel 441, and the other end is respectively connected to a plurality of plunger cavities 429 arranged at intervals; one end of the more than two fourth hot channels 444 can be connected to the third hot channel 442, and the other end is respectively connected to a plurality of plunger cavities 429 arranged at intervals. The pump diverter can effectively divert the hot fluid or cold fluid entering the pump diverter so that it enters multiple plunger cavities respectively (preferably sucked into 4 plunger cavities), and at the same time, the cold fluid or hot fluid in the multiple plunger cavities is merged and pumped out through the pump diverter, and multiple fourth cold channels and multiple fourth hot channels are respectively connected to one side of the plunger pump, and the third cold channel or the third hot channel is respectively connected to one side of the cold end heat exchanger or the hot end heat exchanger.

[0115] Since the pump rotor 430 rotates with the shaft, in order to match the flow rate of the driving pump 400 through the cold storage tank 310 with the magnetization and demagnetization time; the driving pump drives the fluid to flow through the magnetization bed to the hot end, and the fluid flowing through the magnetization bed during demagnetization is always connected to the cold end, a pump diverter 440 is provided at the pump port; Figure 5 To explain: when the plunger 420 compresses the liquid, the fluid enters the cold channel (the third cold channel 441) through the cold channel (the fifth channel 432), and then flows through the cold storage device to reach the cold end; conversely, when the plunger 420 absorbs the liquid, the fluid enters the sixth channel 431 through the third hot channel 442, and then enters the plunger.

[0116] Preferably,

[0117] The pump diverter 440 has a third cold annular shunt channel (not shown) inside, one side of the third cold annular shunt channel (not shown) is connected to the third cold channel 441, and the other side is connected to more than two fourth cold channels 443; the pump diverter 440 has a third hot annular shunt channel (not shown) inside, one side of the third hot annular shunt channel is connected to the third hot channel 442, and the other end is connected to more than two fourth hot channels 444. This is the preferred structural form inside the pump diverter of the present invention, through the third cold annular shunt channel, multiple fourth cold channels can be merged and enter the third cold channel, or the third cold channel can be shunted and enter multiple fourth cold channels; through the third hot annular shunt channel, multiple fourth hot channels can be merged and enter the third hot channel, or the third hot channel can be shunted and enter multiple fourth hot channels.

[0118] Preferably,

[0119] It also includes a hot end heat exchanger 500 and a cold end heat exchanger 600, wherein the third cold channel 441 is connected to the cold end heat exchanger 600, and / or the third hot channel 442 is connected to the hot end heat exchanger 500; and / or the plunger cavity connected to the fourth cold channel 443 and the plunger cavity connected to the fourth hot channel 444 are arranged alternately. The hot end heat exchanger is connected to the third hot channel through the hot end heat exchanger, so that the heat exchange fluid after heat release in the hot end heat exchanger enters the plunger pump assembly through the third hot channel, or the heat exchange fluid in the plunger pump assembly is pumped to the hot end heat exchanger through the third hot channel; the cold end heat exchanger is connected to the third cold channel through the cold end heat exchanger, so that the heat exchange fluid after heat absorption in the cold end heat exchanger enters the plunger pump assembly through the third cold channel, or the heat exchange fluid in the plunger pump assembly is pumped to the cold end heat exchanger through the third cold channel.

[0120] Preferably,

[0121] There are four fourth cold channels 443 and they are evenly arranged in the circumferential direction, there are four fourth hot channels 444 and they are evenly arranged in the circumferential direction, and the fourth cold channels 443 and the fourth hot channels 444 are arranged alternately and at intervals in the circumferential direction. This is the preferred number and arrangement of the fourth cold channels and the fourth hot channels of the present invention, which enables the plunger pump assembly to uniformly suck in the cold fluid and discharge the hot fluid in the circumferential direction, or uniformly suck in the hot fluid and discharge the cold fluid.

[0122] Preferably,

[0123] The third cold channel 441 is located radially inside the third hot channel 442, the third cold annular shunt channel is located radially inside the third hot annular shunt channel, and the fourth cold channel 443 is located radially inside the fourth hot channel 444. This is a further preferred arrangement position of the third cold channel and the third hot channel of the present invention, as well as a further preferred arrangement position of the third cold annular shunt channel and the third hot annular shunt channel, and a further preferred arrangement position of the fourth cold channel and the fourth hot channel, so that the cold channel runs radially inside and the hot channel runs radially outside, and the two are not interconnected and work independently to prevent mutual flow.

[0124] Preferably,

[0125] An annular boss 447 is further provided on one side of the pump diverter 440 where the fourth cold channel 443 and the fourth hot channel 444 are provided, the third cold annular diverter channel axially extends to the inside of the annular boss 447, and the fourth cold channel 443 is provided on the radial outer periphery of the annular boss 447 and radially outward;

[0126] The fourth hot channel 444 is opened on the pump diverter 440 and is provided with a side of the annular boss 447 and avoids the annular boss 447. The fourth hot channel 444 is opened in the axial direction, and the fourth hot channel 444 and the fourth cold channel 443 are alternately arranged in the circumferential direction.

[0127] This is a further preferred structural form of the pump diverter of the present invention. The arrangement of the arc-shaped boss can prevent the cold channel and the hot channel from interflowing with each other, and the channels flow independently.

[0128] Preferably,

[0129] A cold blocking mechanism 445 is also provided radially outwardly on the annular boss 447 and between two adjacent fourth cold channels 443; a heat blocking mechanism 446 is also provided axially on the pump diverter 440 and between two adjacent fourth hot channels 444. This is a further preferred structural form of the pump diverter of the present invention. The cold blocking mechanism and the heat blocking mechanism can prevent the cold channel and the hot channel from interflowing, and the hot channel is closed when the cold channel is connected, and the cold channel is closed when the hot channel is connected, and each channel flows independently.

[0130] In order to realize the cold and hot end diversion function, a pump diverter is used. Figure 7a-7bDescription: The third heat channel 442 of the pump diverter 440 is connected to the hot end heat exchanger 500 through a pipeline. The pump diverter 440 is connected to the rotating shaft 700 through a bearing and maintains a constant position, thereby ensuring that the hot end radiator does not rotate with the shaft; the heat blocking mechanism 446 has a total of 4, presenting a 45° arc, and alternately blocks the sixth channel 431 as the pump rotor rotates, so that the four plungers (the second plunger 422, the fourth plunger 424, the sixth plunger 426, and the eighth plunger 428) at 90° relative to each other can converge into the third hot channel 442 at the same time; the cold blocking mechanism 445 presents a 45° arc, and the four are arranged at 90° relative to each other. As the pump rotor rotates, the fifth channel 432 is alternately blocked, so that the four plungers (the first plunger 421, the third plunger 423, the fifth plunger 425, and the seventh plunger 427) at 90° relative to each other can converge into the third cold channel 441; the pump diverter 440 is used in conjunction with the pump rotor 430.

[0131] Preferably,

[0132] The pump rotor 430 further includes a fifth channel 432 radially opened inside and a sixth channel 431 axially opened inside, one end of the sixth channel 431 is connected to the fifth channel 432, and the other end is connected to the plunger cavity 429, the fourth hot channel 444 can be directly connected to the sixth channel 431 and then connected to the plunger cavity 429; the fourth cold channel 443 can be connected to the fifth channel 432 and then connected to the plunger cavity 429 through the sixth channel 431; and the fourth hot channel 444 and the fourth cold channel 443 are alternately connected to the plunger cavity 429.

[0133] This is the preferred structural form inside the pump rotor on the plunger pump assembly of the present invention. The channels in the pump diverter can be connected through the fifth channel and the sixth channel, and the hot channel located on the radial outside is directly connected to the plunger cavity through the sixth channel, while the cold channel located on the radial inside is connected to the plunger cavity through the fifth channel and the sixth channel in sequence, completing the effect of alternating connection of the fluid.

[0134] The magnetic refrigeration system has a flow diagram as follows Figure 8 , now combined Figure 8 To explain:

[0135] The hot end radiator 500 and the cold end radiator 600 are respectively fixed to the hot end heat dissipation cover 501 and the cold end heat dissipation cover 601; the fluid flows through the pipeline through the pump 400 to reach the first cold channel 342, and then flows through the demagnetization bed (the second magnetic working fluid cavity 312). At this time, the fluid temperature becomes low, and reaches the cold end heat exchanger 600 through the second cold channel 352. The fluid exchanges the cold and the temperature returns to normal temperature; the outside of the pipeline is wrapped with thermal insulation materials such as thermal insulation cotton; the normal temperature fluid then passes through the second hot channel 351 and flows through the magnetization bed (the first magnetic working fluid cavity 311), absorbs the heat generated by the magnetic working fluid, and then exchanges heat with the hot end heat exchanger 500 through the first hot channel 341 to return to normal temperature. Finally, the fluid flows into the plunger to complete a magnetic refrigeration cycle.

[0136] The present invention is:

[0137] 1. Provide an electromagnetic-permanent magnetic hybrid magnetic field generator, so that the strength of the magnetic field air gap is enhanced, and has adjustable field strength and adjustable frequency functions, enhancing system flexibility;

[0138] 2. The magnetic field subsystem and the fluid drive subsystem are structurally coupled so that the magnetic field waveform and the flow waveform can be synchronously matched, making the system flow more balanced and avoiding fluid impact of the mechanical valve;

[0139] 3. The electromagnetic coil of the magnetic field generator is also used to drive the fluid drive mechanism, eliminating the drive pump and drive motor, greatly reducing the power consumption of the whole machine and making the whole machine structure more compact and miniaturized;

[0140] The present invention solves the following technical problems

[0141] 1. The magnetic field generators of previous magnetic refrigeration devices mostly use permanent magnets or electromagnetics. The permanent magnet magnetic field generator has the problems of large size, high driving power consumption and low frequency, while the electromagnetic magnetic field generator has the problems of high heat generation and low energy consumption.

[0142] 2. In the past, the combination of mechanical valve and hydraulic pump had high power consumption. In addition, the mechanical valve was subjected to oscillating torque and did not match the flow waveform of the pump, which caused flow imbalance in the system during the hot and cold blowing stages, resulting in low heat exchange efficiency and low refrigeration capacity.

[0143] 3. In the past, the various sub-systems of magnetic refrigeration devices (such as fluid drive mechanism, magnetic field generator system, heat exchanger system, etc.) were relatively independent, each occupying a part of independent space in structure, and there was no strong dynamic connection in structure, so the overall structure size was large, which was not conducive to miniaturization.

[0144] The magnetic field source, regenerator flow path unit and control strategy provided by the present invention have the following beneficial effects:

[0145] 1. Combine the two magnetic field generation methods of electromagnetic field and permanent magnetic field to provide an electromagnetic-permanent magnetic field generator, which strengthens the strength of the magnetic field air gap and has adjustable field strength and frequency functions. It solves the problems of high power consumption of permanent magnet type and low energy efficiency of electromagnetic type;

[0146] 2. Due to the structural consistency coupling between the magnetic field subsystem and the fluid drive subsystem, the magnetic field waveform and the flow waveform can be well synchronized, solving the problem of unbalanced cold and hot blow flow and the problem of large pressure shock when switching the previous mechanical valve;

[0147] 3. The electromagnetic coil can also provide driving power for the piston mechanism, eliminating the driving motor of the previous magnetic refrigeration device, so that the power consumption of the whole machine is greatly reduced and the structure is more compact.

[0148] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A magnetic refrigeration device, characterized in that: include: A stator assembly (100), the stator assembly (100) comprising a yoke outer cylinder (110) and at least two permanent magnets arranged on the inner circumference of the yoke outer cylinder (110), the at least two permanent magnets being spaced and distributed along the circumferential direction; Also included is a rotor assembly (200), the rotor assembly (200) being arranged on the inner circumference of the stator assembly (100) of the cylindrical structure, and the rotor assembly (200) comprising at least two rotor poles (201) arranged in a circumferential distribution, an electromagnetic coil being wound between the two rotor poles (201), a rotating core (220) being arranged on the inner circumference of the electromagnetic coil, and the electromagnetic coil being capable of being energized to generate electromagnetic force with permanent magnets distributed at intervals, thereby driving the rotor assembly to rotate; It also includes a cold storage device (310), the cold storage device is cylindrical and located between the stator assembly (100) and the rotor assembly (200), and at least two magnetic working medium cavities are provided between the inner wall and the outer wall of the cold storage device (310), and magnetic working medium is accommodated in the magnetic working medium cavities; the cold storage device (310) is connected to the rotor assembly (200) and rotates integrally with the rotation of the rotor assembly (200); A first cold storage diverter (340) is further provided at one axial end of the cold storage device (310); the magnetic working fluid cavity is in communication with the interior of the first cold storage diverter (340); a first hot annular channel for merging a plurality of heat exchange fluids after being heated and released by the magnetic working fluid is provided inside the first cold storage diverter (340); and a first cold annular channel for merging a plurality of heat exchange fluids after being cooled and absorbed by the magnetic working fluid is provided inside the first cold storage diverter (340); A second cold storage flow diverter (350) is further provided at the other axial end of the cold storage device (310); the magnetic working fluid cavity is in communication with the interior of the second cold storage flow diverter (350); a second hot annular channel for merging a plurality of heat exchange fluids after being heated and released by the magnetic working fluid is provided inside the second cold storage flow diverter (350); and a second cold annular channel for merging a plurality of heat exchange fluids after being cooled and absorbed by the magnetic working fluid is provided inside the second cold storage flow diverter (350); The magnetic refrigeration device further comprises a hot-end heat exchanger (500) and a cold-end heat exchanger (600); the first cold storage device flow diverter (340) further comprises a first hot channel (341) and a first cold channel (342) on a side facing away from the cold storage device (310); the first hot channel (341) is in communication with the first hot annular channel; the first cold channel is in communication with the first cold annular channel; the first hot channel (341) is in communication with an inlet of the hot-end heat exchanger (500); and the first cold channel (342) is in communication with an outlet of the hot-end heat exchanger (500); The second cold storage device flow diversion device (350) further comprises a second hot channel (351) and a second cold channel (352) on a side facing away from the cold storage device (310); the second hot channel (351) is connected to the second hot annular channel; the second cold channel is connected to the second cold annular channel; the second hot channel (351) is connected to the outlet of the cold end heat exchanger (600); and the second cold channel (352) is connected to the inlet of the cold end heat exchanger (600).

2. The magnetic refrigeration device according to claim 1, characterized in that: The plurality of electromagnetic coils are adjacent to each other and form a full circle, and adjacent electromagnetic coils are alternately connected to direct current; the cold storage device (310) is a cylinder, the number of the magnetic working fluid cavities corresponds to the number of the electromagnetic coils, the plurality of magnetic working fluid cavities are adjacent to each other and form a full circle, and two adjacent magnetic working fluid cavities are separated by a partition.

3. The magnetic refrigeration device according to claim 1, characterized in that: The structures of the multiple permanent magnets are the same and are evenly distributed along the circumferential direction. The central angle of the gap between two adjacent permanent magnets is equal to the central angle of the permanent magnets; and / or the central angle of each electromagnetic coil is equal to that of each permanent magnet; and / or the central angle of each magnetic working fluid cavity is equal to that of each permanent magnet.

4. The magnetic refrigeration device according to claim 1, characterized in that: In the circumferential direction, there are four permanent magnets, namely a first permanent magnet (101), a second permanent magnet (102), a third permanent magnet (103) and a fourth permanent magnet (104), and two adjacent permanent magnets are spaced apart; and / or, in the circumferential direction, there are eight rotor poles (201) and eight electromagnetic coils, respectively, and the electromagnetic coils are a first electromagnetic coil (211), a second electromagnetic coil (212), a third electromagnetic coil (213), a fourth electromagnetic coil (214), a fifth electromagnetic coil (215), a sixth electromagnetic coil (216), a seventh electromagnetic coil (217) and an eighth electromagnetic coil (218); and / or, in the circumferential direction, the number of the magnetic working fluid cavities is 8, namely, a first magnetic working fluid cavity (311), a second magnetic working fluid cavity (312), a third magnetic working fluid cavity (313), a fourth magnetic working fluid cavity (314), a fifth magnetic working fluid cavity (315), a sixth magnetic working fluid cavity (316), a seventh magnetic working fluid cavity (317) and an eighth magnetic working fluid cavity (318).

5. The magnetic refrigeration device according to claim 1, characterized in that: A heat exchange fluid can also flow through the magnetic working medium cavity, and a blocking portion is provided at the axial end of the magnetic working medium cavity to block the passage of the magnetic working medium and allow the heat exchange fluid to pass through.

6. The magnetic refrigeration device according to claim 1, characterized in that: The hot-end heat exchanger (500) is also covered with a hot-end heat dissipation cover (501) and / or the cold-end heat exchanger (600) is also covered with a cold-end heat dissipation cover (601).

7. The magnetic refrigeration device according to claim 1, characterized in that: A first cold accumulator end cover (320) is further provided between the cold accumulator (310) and the first cold accumulator flow diverter (340), and a plurality of first communication channels are provided inside the first cold accumulator end cover (320), corresponding one-to-one to the plurality of magnetic working fluid cavities, and one end of the first communication channel is connected to the magnetic working fluid cavity, and the other end is connected to the first hot annular channel and / or the first cold annular channel of the first cold accumulator flow diverter (340); and / or, A second cold accumulator end cover (330) is further provided between the cold accumulator (310) and the second cold accumulator flow diverter (350), and a plurality of second communication channels are provided inside the second cold accumulator end cover (330), corresponding one-to-one to the plurality of magnetic working fluid cavities, and one end of the second communication channel is connected to the magnetic working fluid cavity, and the other end is connected to the second hot annular channel and / or the second cold annular channel of the second cold accumulator flow diverter (350).

8. The magnetic refrigeration device according to any one of claims 1 to 5, characterized in that: A rotating shaft (700) is arranged inside the rotating core (220), and the rotating shaft (700) rotates together with the rotating core (220). The magnetic refrigeration device further comprises a plunger pump assembly (400), the plunger pump assembly (400) being capable of pumping a heat exchange fluid, the plunger pump assembly (400) comprising a pump rotor (430) and a pump stator (410), the pump stator (410) being arranged on the outer periphery of the pump rotor (430), and the rotating shaft (700) being also passed through an axial hole inside the pump rotor (430) to drive the pump rotor (430) to rotate.

9. The magnetic refrigeration device according to claim 8, characterized in that: The pump rotor (430) is provided with a plunger (420) and a plunger cavity (429) for accommodating the plunger (420) to perform reciprocating motion therein. The plunger cavity (429) extends in the radial direction of the pump rotor (430). The radial outer end of the plunger (420) abuts against the inner circumferential wall of the pump stator (410). In the cross section, the inner circumferential wall of the pump stator (410) is a curve. The curve has a far point (411) that is farthest from the axis of the pump rotor (430) and a near point (412) that is closest to the axis of the pump rotor (430). The far point (411) to the near point (412) is a smooth transition. As the pump rotor (430) rotates, the plunger (420) is driven by the inner circumferential wall curve of the pump stator (410) to perform reciprocating motion in the plunger cavity (429).

10. The magnetic refrigeration device according to claim 9, characterized in that: In the circumferential direction, there are eight plungers, namely a first plunger (421), a second plunger (422), a third plunger (423), a fourth plunger (424), a fifth plunger (425), a sixth plunger (426), a seventh plunger (427) and an eighth plunger (428); there are also eight plunger cavities (429) which correspond one to one with the plungers (420); the curve comprises four arc segments of the same shape, each arc segment comprises two near points (412) and one far point (411), and the intersection position of adjacent arc segments is the near point (412).

11. The magnetic refrigeration device according to claim 10, characterized in that: The invention also comprises a pump diverter (440), the pump diverter (440) being connected to one end of the pump rotor (430) of the plunger pump assembly, the pump diverter (440) having a third cold channel (441) and a third hot channel (442) on the side facing away from the pump rotor (430), the pump diverter (440) having two or more fourth cold channels (443) and two or more fourth hot channels (444) on the side opposite to the pump rotor (430), and the two or more fourth cold channels (443) having one end capable of being connected to the third cold channel (441) and the other end being connected to a plurality of plunger cavities (429) arranged at intervals; the two or more fourth hot channels (444) having one end capable of being connected to the third hot channel (442) and the other end being connected to a plurality of plunger cavities (429) arranged at intervals.

12. The magnetic refrigeration device according to claim 11, characterized in that: A third cold annular shunt channel is provided inside the pump diverter (440), one side of the third cold annular shunt channel is connected to the third cold channel (441), and the other side is connected to two or more fourth cold channels (443); a third hot annular shunt channel is provided inside the pump diverter (440), one side of the third hot annular shunt channel is connected to the third hot channel (442), and the other end is connected to two or more fourth hot channels (444).

13. The magnetic refrigeration device according to claim 11, characterized in that: It also includes a hot-end heat exchanger (500) and a cold-end heat exchanger (600), wherein the third cold channel (441) is connected to the cold-end heat exchanger (600), and / or the third hot channel (442) is connected to the hot-end heat exchanger (500); and / or the plunger cavity connected to the fourth cold channel (443) and the plunger cavity connected to the fourth hot channel (444) are alternately arranged.

14. The magnetic refrigeration device according to claim 11, characterized in that: There are four fourth cold channels (443) which are evenly arranged along the circumference, there are four fourth hot channels (444) which are evenly arranged along the circumference, and the fourth cold channels (443) and the fourth hot channels (444) are alternately and spaced apart in the circumference.

15. The magnetic refrigeration device according to claim 12, characterized in that: The third cold channel (441) is located radially inside the third hot channel (442), the third cold annular shunt channel is located radially inside the third hot annular shunt channel, and the fourth cold channel (443) is located radially inside the fourth hot channel (444).

16. The magnetic refrigeration device according to claim 12, characterized in that: An annular boss (447) is also provided on one side of the pump flow divider (440) on which the fourth cold channel (443) and the fourth hot channel (444) are provided, the third cold annular flow divider channel axially extending to the interior of the annular boss (447), and the fourth cold channel (443) is provided on the radial outer periphery of the annular boss (447) and radially outward; The fourth hot channel (444) is opened on the pump diverter (440) and is provided on a side of the annular boss (447) and avoids the annular boss (447). The fourth hot channel (444) is opened in the axial direction. The fourth hot channel (444) and the fourth cold channel (443) are alternately arranged in the circumferential direction.

17. The magnetic refrigeration device according to claim 16, characterized in that: A cold blocking mechanism (445) is also provided on the annular boss (447) and is located between two adjacent fourth cold channels (443) so as to extend radially outward; and a heat blocking mechanism (446) is also provided on the pump diverter (440) and is located between two adjacent fourth hot channels (444) so ​​as to extend axially.

18. The magnetic refrigeration device according to claim 11, characterized in that: The pump rotor (430) further has a fifth channel (432) radially opened inside and a sixth channel (431) axially opened inside; one end of the sixth channel (431) is connected to the fifth channel (432) and the other end is connected to the plunger cavity (429); the fourth hot channel (444) can be directly connected to the sixth channel (431) and further connected to the plunger cavity (429); the fourth cold channel (443) can be connected to the fifth channel (432) and further connected to the plunger cavity (429) through the sixth channel (431); and the fourth hot channel (444) and the fourth cold channel (443) are alternately connected to the plunger cavity (429).

Images