139 results about "Magnetic refrigeration" patented technology

1. The name of the design product: magnetic refrigeration three-in-one wireless charger (W105). 2. The use of the design product: the design product is a magnetic refrigeration three-in-one wireless charger, which is used to charge electronic devices such as watches, mobile phones, and Bluetooth earphones. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: unfolded state perspective view 1.

The invention relates to the technical field of heat-insulating and demagnetizing refrigeration, and discloses a heat-insulating and demagnetizing refrigeration material based on a Trellis crystal lattice and a preparation method and application of the heat-insulating and demagnetizing refrigeration material. The chemical formula of the heat insulation and demagnetization refrigeration material based on the Trellis crystal lattice is Gd2GeB2O8. A magnetic test result of the Gd2GeB2O8 crystal shows that the magnetic anisotropy of the crystal material is relatively weak and tends to magnetic isotropy, and a long-range magnetic orderliness phenomenon is not observed above 1.8 K. And when adiabatic demagnetization is carried out under initial conditions that T is equal to 3K and B is equal to 7T, the material can reach the maximum negative magnetic entropy difference of 51.68 J * kg <-1 > * K <-1 >, which shows that the Gd2GeB2O8 has a better application prospect in a 3-17K temperature zone and a sub-Kelvin temperature zone.

The application discloses a preparation method of a wide-temperature-range large-magnetic-entropy lanthanum-iron-silicon-based room-temperature magnetic refrigeration material, which uses La, Fe, Co and Si powders as raw materials, and prepares the wide-temperature-range large-magnetic-entropy lanthanum-iron-silicon-based room-temperature magnetic refrigeration material through high-energy ball milling of the raw materials under a protective atmosphere, and then through pressing and annealing heat treatment. The high-energy ball milling-annealing method for preparing the lanthanum-iron-silicon-based room-temperature magnetic refrigeration material has the advantages that the obtained lanthanum-iron-silicon-based room-temperature magnetic refrigeration material has a Curie temperature in a room-temperature range, a wide working temperature range and excellent magnetic heat performance, can provide a new idea for preparation of high-performance lanthanum-iron-silicon-based room-temperature magnetic refrigeration material, and has the advantages of simple preparation process, low cost, low requirement on reaction equipment and suitability for popularization and application.

The invention relates to the technical field of magnetic refrigeration, in particular to an outdoor unit and a magnetic heat pump air conditioner. The invention aims to solve the problem of temporary non-magnetic refrigeration air conditioner products in the prior art. In order to achieve the purpose, the outdoor unit comprises a shell provided with a first partition plate which divides the shell into an upper layer space and a lower layer space; the magnetic refrigeration unit comprises a driving mechanism, a transmission mechanism, a magnetic field assembly, a heat regenerator, a pump body and a connecting pipeline, the driving mechanism is connected with the magnetic field assembly through the transmission mechanism, the pump body is arranged to be capable of driving a heat exchange medium to flow in the connecting pipeline and the heat regenerator, and parts of the driving mechanism, the magnetic field assembly, the heat regenerator and the pump body are arranged in the upper-layer space; the rest are arranged in the lower-layer space; the outdoor heat exchanger is arranged in the upper-layer space or the lower-layer space and communicates with the heat regenerator; and the outdoor fan is arranged on one side of the outdoor heat exchanger. The invention provides a specific layout mode of the magnetic refrigeration unit, so that an outdoor unit product is compact in structure and good in operation stability.

La(Fe,Si) has high pulverizability and does not require a large load to be turned into a powder. 13 H α The present invention provides a magnetic refrigeration material, a method for producing the same, and a magnetic refrigeration apparatus equipped with the magnetic refrigeration material. [Solution] The magnetic refrigeration material of the present invention is based on the following general formula (1) TIFF2026066207000015.tif7170[In formula (1), M represents one or more elements selected from the group consisting of Mn and Co, and A represents the element Al. x, y, a, b, c, and z are 0≦x≦0.4, 1.0 respectively.

The invention belongs to the technical field of magnetic refrigeration materials, and particularly relates to manganese pentaethylenehexamine hydrochloride and a preparation method and extremely low temperature magnetic refrigeration application thereof. The chemical formula of the extremely low temperature magnetic refrigeration material is [Mn (C10H28N6)] Cl2; the magnetic phase transition temperature of the extremely-low-temperature magnetic refrigeration material is lower than 0.4 K. The extremely-low-temperature magnetic refrigeration material has a large magnetothermal effect near 1K, and when the magnetic field change is 0-5T, the maximum magnetic entropy change is smaller than or equal to 40.8 J * kg <-1 > * K <-1 >. The extremely-low-temperature magnetic refrigeration material is rich in preparation raw materials, simple in process, free of rare earth elements, low in cost and suitable for industrial large-scale production.

This utility model discloses a permanent magnet circuit device and a rotary magnetic refrigerator. The permanent magnet circuit device includes a shaft, a stator, and a rotor; the rotor includes a housing, a first magnetic unit, and a second magnetic unit; the housing has a cylindrical structure; the housing is fitted over the stator, with a first accommodating space between them; the housing has an inner sidewall and an outer sidewall, with a second accommodating space between the inner and outer sidewalls for accommodating the first and second magnetic units; the first and second magnetic units are symmetrically arranged about the centerline of the shaft; the first magnetic unit includes n layers of magnets distributed radially along the housing, and the second magnetic unit includes n layers of magnets distributed radially along the housing, where n is a positive integer greater than or equal to 2; the n layers of magnets include a first layer and a second layer. The permanent magnet circuit device has a relatively large intermediate gap volume.

This invention belongs to the field of magnetic refrigeration technology, specifically relating to the application of a hexagonal crystal material Sr6GdSc(BO3)6 in ultra-low temperature magnetic refrigeration. This hexagonal crystal material Sr6GdSc(BO3)6 does not undergo a phase transition at temperatures above 100 mK and exhibits a large magnetocaloric effect near 1 K. The maximum magnetic entropy changes under magnetic field variations of 0–1 T, 0–2 T, and 0–3 T are 39.36 mJ·cm⁻¹, respectively. ‑3 · K ‑1 Or 9.01 J·kg ‑1 ·K ‑1 53.95 mJ·cm ‑3 ·K ‑1 Or 12.34 J·kg ‑1 ·K ‑1 and 59.49 mJ·cm ‑3 ·K ‑1 Or 13.61 J·kg ‑1 ·K ‑1 The hexagonal crystal material Sr6GdSc(BO3)6 of this invention exhibits significant magnetocaloric effects and superior low-temperature performance, and has great application prospects in the field of ultra-low temperature magnetic refrigeration technology.

The application belongs to the technical field of rare earth molecule-based magnetic refrigeration material preparation, and discloses a rare earth molecule-based magnetic refrigeration material, a preparation method and application thereof. The preparation method provided by the application is as follows: Schiff base ligand H2mpcd ((E)-N-[(2-hydroxy-3-methoxyphenyl)methylene]pyrazine-2-formylhydrazine), Gd(OTF)3 and Li2CO3 are mixed and dissolved in a mixed solvent of CH3OH and C2H5OH in a certain proportion, stirring, filtering, standing and volatilizing to obtain orange-yellow block crystals. The rare earth molecule-based magnetic refrigeration material is a five-core ladder-shaped metal skeleton structure, and can be applied to the preparation of molecular magnetic materials and molecular magnetic refrigeration materials.

The invention provides a friction-free running all-solid-state magnetic refrigeration device which comprises at least one refrigeration unit, and the refrigeration unit comprises a plurality of refrigeration pieces and a plurality of heat return pieces which are vertically and alternately arranged; wherein the multiple heat regeneration pieces are positioned in the thickness direction in a spaced arrangement mode, and the interval size is larger than the thickness of the refrigeration piece; and one refrigeration sheet is accommodated in each interval. Wherein the refrigeration pieces do up-down reciprocating motion in the interval space of every two adjacent heat regeneration pieces in the vertical direction under the alternate leading action of magnetic attraction force and gravity, and in the moving process, each refrigeration piece and the two adjacent heat regeneration pieces conduct periodic heat conduction so as to achieve refrigeration. According to the design of the all-solid-state magnetic refrigeration device which does not slide in the tangential direction and can be separated in the normal direction, the problem that the service life is shortened due to surface abrasion of a refrigeration piece and a heat regeneration piece in a previously designed device is solved, and weakening of the refrigeration capacity of the device due to extra heat generated by friction is avoided.

The application provides a magnetic refrigerator magnet assembly structure and a magnetic refrigerator, and relates to the technical field of magnetic refrigerators. The magnetic refrigerator magnet assembly structure comprises a rotating rod, lifting rings, first magnets, second magnets and a cold storage bed. The rotating rod rotates horizontally, and two lifting rings are arranged outside the rotating rod and can move synchronously towards or away from each other. The first magnets and the second magnets are rotatably arranged outside the lifting rings. When the first magnets and the second magnets move towards each other and approach the cold storage bed, the different magnetic poles of one side coated with epoxy resin face each other. When the first magnets and the second magnets move away from each other and move away from the cold storage bed, the different magnetic poles of the other side away from the epoxy resin face each other. The cold storage bed is fixed between the first magnets and the second magnets. The application controls the strength of the magnetic field, adjusts the heat release or heat absorption degree of the magnetic working medium, and controls the temperature change of the object to be cooled. When the magnetic field is enhanced, the epoxy resin helps to dissipate heat, reducing the influence of high temperature on the magnetic field. When the magnetic field is weakened, the epoxy resin is removed to ensure the cooling accuracy.

Embodiments of the present application provide a magnetic working substance bed of a magnetic refrigeration device, wherein the magnetic working substance bed is formed with a plurality of passages for accommodating magnetic working substance through in a longitudinal direction, wherein each passage comprises a first passage section and a second passage section, the magnetic working substance bed comprising: a first longitudinal section in which the plurality of first passage sections are formed; and a second longitudinal section in which the plurality of second passage sections are formed, wherein the first longitudinal section and the second longitudinal section are configured to be connectable to each other such that the first passage sections and the second passage sections are in communication, respectively. Furthermore, the present application also provides a corresponding magnetic refrigeration device, an assembly method of a magnetic refrigeration device, and a household refrigeration appliance. According to certain embodiments of the present application, the magnetic working substance can be more easily filled uniformly and sufficiently within the passages.

The application discloses Y-type hexagonal ferrite material with dual magnetic heat effect and a preparation method and application thereof, belongs to the technical field of ferrite ceramic materials, and is denoted as Sr2Zn 2‑x Ni x Fe 12 O 22 (x=0.0, 0.8 or 2.0), and can be used as a heat sink composite material in the temperature range in which the inverse magnetic heat effect exists. For the Sr2Zn2Fe 12 O 22 material, a platform-shaped conventional magnetic heat effect exists near room temperature, is suitable for Ericsson magnetic refrigeration cycle, the magnetic entropy change and the relative refrigeration power gradually increase with the increase of the Ni ion doping amount, and reach the maximum when the doping amount is 0.8; under the condition that the magnetic field changes by 0-90kOe, the magnetic entropy change reaches 3.16J / kg K at 4K, -1.02J / kg K at 16K and 1.33J / kg K at 354K, and the corresponding relative refrigeration power is 358.68J / kg.

The application relates to the technical field of refrigeration equipment, and provides a magnetic refrigeration structure, which comprises a magnetic field source and a ring-shaped magnetic conductive outer frame, the magnetic field source is arranged on the inner side of the magnetic conductive outer frame, the magnetic field source comprises parallel first magnetic supply groups and second magnetic supply groups, a plurality of first magnetic blocks are arranged in the first magnetic supply groups, a plurality of second magnetic blocks are arranged in the second magnetic supply groups, the polarities of the first magnetic blocks and the second magnetic blocks are opposite, the magnetic conductive outer frame forms working air gaps and a plurality of closed magnetic circuits, the magnetic conductive outer frame has a specific structure and is provided with a cooling pipe, and the magnetic conductive outer frame is further provided with a connecting plate, a heat-resistant adhesive layer, a connecting assembly, an auxiliary cooling assembly and the like. The application solves the problems of uneven magnetic field and easy loss of magnetism, and improves the uniformity and reliability of cooling when the magnetism is lost.

The present invention relates to aqueous solutions, methods of manufacturing the same and uses thereof. The aqueous solution comprises an alkaline earth metal added in the form of a water-soluble salt, manganese at least mainly present as a citrate complex of manganese having an oxidation state of +3 or +4, and optionally a lanthanide present in the form of a water soluble complex. The aqueous precursor solutions contain metals at appropriate stoichiometric ratios for producing films of complex inorganic metal oxides by Chemical Solution Deposition (CSD). The complex inorganic metal oxides can be used as memristor materials, and generally in microelectronic, magnetic, and spintronic devices, in solid oxide fuel cells, in magnetic refrigeration, and in the fields of biomedicine, and as catalysts.

The utility model discloses a kind of robot parallel liquid cooling circulation systems based on magnetic refrigeration, including several liquid cooling cavities, cold liquid, magnetic refrigeration device and air cooling device;Each liquid cooling cavities are respectively arranged on each heat source position of robot, for cooling each heat source position, and each liquid cooling cavities are arranged in parallel;The cold liquid is filled in the liquid cooling cavity;Magnetic refrigeration device is connected with the liquid cooling cavity and is conducted, and at least for the cold liquid cooling;The air cooling device is connected with the magnetic refrigeration device and is conducted, and the magnetic refrigeration device is heat dissipation for the magnetic refrigeration device.The liquid cooling circulation system of the utility model, by adding magnetic refrigeration device and air cooling device, provide more efficient, lower temperature cold liquid for robot, meet the lower temperature refrigeration requirement of robot, ensure the normal work of robot.

The application discloses a phase modulation camera cooling system based on non-azeotropic working medium and magnetic refrigeration, which comprises a magnetic refrigeration circulating mechanism connected with a phase modulation camera stator, and is filled with non-azeotropic mixed working medium in the inside. The magnetic refrigeration circulating mechanism comprises a magnetic refrigeration module, an external magnetic field adjusting system, a first condenser, an axial flow fan, a first gas-liquid separator and a refrigerant pump. The magnetic refrigeration module is internally provided with a magnetic working medium bed and a cooling flow channel, and phase change of the working medium is realized through heat exchange; the application utilizes temperature slip characteristics formed by the difference of boiling points of the non-azeotropic working medium, matches different temperature zones of lubricating oil and the stator coil, and improves cooling adaptability and energy efficiency; the magnetic refrigeration module is integrated in the inside of the stator, the heat dissipation is strengthened by combining with an alternating magnetic field adjustment, the structure is simplified, and the efficiency is improved; the lubricating oil tank cooling mechanism cooperates with the auxiliary condensing mechanism, the cooling efficiency, the working medium recovery rate and the operation reliability are improved, and the energy consumption and the cost are reduced.

To provide a particle structure, a bed structure, a module and a magnetic refrigeration device that improve performance.SOLUTION: A particle structure (1) is a particle structure used in a magnetic refrigeration device (100) and includes particles (11) and a coating (12). The particles (11) have a magnetocaloric effect. The coating (12) covers a portion of the surface (11a) of the particles (11). The thermal conductivity of the coating (12) is lower than the thermal conductivity of the particles (11). The coating (12) has a constant thickness along the surface (11a).SELECTED DRAWING: Figure 1

The invention discloses a magnetic refrigeration material with a dimension cross critical behavior and a preparation method and application thereof, and belongs to the technical field of magnetic materials. HoNi2 thin strips are prepared through a melt rapid quenching method, critical indexes beta = 0.215, gamma = 0.748 and delta = 4.489 of the HoNi2 thin strips are measured through a corrected Arrott curve and a Kouvell-Fisher method, and it is found that the material has the dimension cross behavior from 3D to 2D near the Curie temperature (TC = 14K); due to the characteristic, the low-temperature magnetic refrigeration material shows excellent performance (when [mu] 0 [delta] H is equal to 5T, [delta] SMmax is equal to 20J kgK) in the field of low-temperature magnetic refrigeration, and is suitable for low-temperature refrigeration equipment for hydrogen liquefaction and the like.

The invention provides a metal single crystal material for extremely low temperature magnetic refrigeration, the metal single crystal material has the following chemical formula: RNi4Mg, and R is Yb or Nd. The invention further provides a method for preparing the metal single crystal material for extremely low temperature magnetic refrigeration, and application of the metal single crystal material for extremely low temperature magnetic refrigeration or the metal single crystal material for extremely low temperature magnetic refrigeration prepared by the method in magnetic refrigeration devices. The metal single crystal material provided by the invention can overcome the difficulty in obtaining an extremely low temperature environment in a traditional refrigeration technology, and can become an ideal material for simply and quickly realizing the extremely low temperature measurement environment through a magnetic refrigeration technology in low temperature scientific research in the future.

The invention provides a magnetic refrigerator magnet assembly structure and a magnetic refrigerator, and relates to the technical field of magnetic refrigerators. The magnet assembly structure of the magnetic refrigerator comprises a rotating rod, lifting rings, a first magnet, a second magnet and a cold storage bed, the rotating rod rotates horizontally, the two lifting rings are arranged outside the rotating rod and can synchronously move towards each other or away from each other, and the first magnet and the second magnet are rotatably arranged outside the lifting rings. When the first magnet and the second magnet move away from the cold storage bed, the different magnetic poles on the faces away from the epoxy resin are opposite, and the cold storage bed is fixedly arranged between the first magnet and the second magnet. The intensity of the magnetic field is controlled, so that the heat release or heat absorption degree of the magnetic working medium is adjusted, and the temperature change of a cooled object is controlled; and when the magnetic field is weakened, the epoxy resin is removed to ensure the cooling precision.

The application relates to a EuTiO3-based composite material and a preparation method and application thereof, and belongs to the technical field of magnetic refrigeration materials. The EuTiO3-based composite material provided by the application comprises a EuTiO3 base and a metal filler; wherein the EuTiO3 base is EuTiO3 and / or EuTiO3 doped with metal M, the metal M is at least one of Al, Nb, Ta and Zr; the metal filler is Cu, and the mass content of the Cu is 2-20%; and the preparation method is that a copper layer is uniformly covered on the surface of EuTiO3-based micro powder by adopting a chemical plating technology, and then tabletting and sintering are carried out to obtain the EuTiO3-based composite material. The EuTiO3-based composite material has both large magnetic heat effect and high thermal conductivity in a liquid helium temperature range, can obtain high heat exchange efficiency and refrigeration capacity in a magnetic refrigeration system, and has high practical value.

The invention relates to the technical field of magnetic refrigeration, in particular to a magnetic heat pump system. The problems that a traditional steam compression type air conditioner is not environmentally friendly, poor in energy efficiency and poor in user experience are solved. In order to achieve the purpose, the magnetic heat pump system comprises a magnetic refrigeration unit, the magnetic refrigeration unit comprises multiple stages of magnetic refrigeration modules which are sequentially arranged, each stage of magnetic refrigeration module comprises a magnetic field assembly, a heat regenerator, a pump body and a connecting pipeline, and the adjacent magnetic refrigeration modules are arranged in an overlapped mode; the low-temperature end heat exchanger is communicated with the first-stage magnetic refrigeration module in the multi-stage magnetic refrigeration module; and the high-temperature end heat exchanger communicates with the last stage of magnetic refrigeration module in the multiple stages of magnetic refrigeration modules. By arranging the magnetic refrigeration unit, refrigeration or heating can be achieved through the magnetocaloric effect, and the advantages of being environmentally friendly, high in energy efficiency and good in user experience are achieved.

An objective of the present invention is to provide: a displacer device with which it is possible to achieve highly efficient cooling performance and a compact device size even when a magnetic cooling function is added; and a cooler. Provided is a displacer device 10 in which a displacer 11 having a cold storage material is disposed therein, and coldness is generated by a working fluid, which is compressed inside a storage container 50, being expanded by means of the displacer 11 reciprocating inside the storage container 50. A magnetic cooling material 15 is disposed at the low-temperature end side of the displacer 11, and a magnetic circuit 40 that causes the magnetic state of the magnetic cooling material 15 to change is provided at the exterior of the storage container 50 corresponding to the magnetic cooling material 15. The magnetic circuit 40 causes the magnetization of the magnetic cooling material 15 to increase and decrease depending on the position of the displacer 11.

The invention relates to the technical field of data analysis and intelligent control, and provides an ice rink temperature regulation and control method and system based on data analysis, and the method comprises the steps: constructing an ice layer two-dimensional temperature field through Kriging interpolation; predicting a thermal load based on the multi-branch LSTM model; and in combination with the space temperature standard deviation and a master-slave refrigeration system (compression refrigeration and magnetic refrigeration), fuzzy PID cooperative control is executed. The technical problems that a traditional ice rink is slow in temperature control response, poor in uniformity and high in energy consumption are solved, and accurate dynamic adjustment of the ice surface temperature is achieved.

The application discloses a kind of magnetic refrigerator refrigeration power testing device and method provided by the application.A magnetic refrigerator includes a pair of magnetic regenerator modules, and the testing device includes: a heating container having a heat exchange fluid inlet and a heat exchange fluid outlet, and a heater for heating the heat exchange fluid flowing through the heating container;A pipe network is respectively connected to the cold end of the pair of magnetic regenerator modules and the heat exchange fluid inlet and outlet of the heating container, and a valve structure is provided on the pipe network to control the flow direction of the heat exchange fluid in the pipe network to remain: from the cold end of any one magnetic regenerator module to the heat exchange fluid inlet of the heating container, and from the heat exchange fluid outlet of the heating container to the cold end of the other magnetic regenerator module;Multiple temperature sensors.The device can improve testing accuracy.

The invention relates to the technical field of magnetic refrigeration, in particular to a magnetic refrigeration unit. The single-stage magnetic refrigeration module aims at solving the problems that an existing single-stage magnetic refrigeration module is only suitable for part of temperature ranges, the adaptation range is insufficient, and the operation energy efficiency is poor. In order to achieve the purpose, the magnetic refrigeration unit comprises multiple stages of magnetic refrigeration modules which are sequentially arranged, each stage of magnetic refrigeration module comprises a magnetic field assembly, a heat regenerator, a pump body and a connecting pipeline, and the connecting pipelines of the adjacent magnetic refrigeration modules are arranged in an overlapped mode. By arranging the multi-stage magnetic refrigeration module, the multi-stage magnetic refrigeration module can be utilized to realize large-temperature-span regulation and control adapting to a larger-range environment temperature, and the application range of the magnetic refrigeration unit is widened. In addition, due to the mode that the adjacent magnetic refrigeration modules are arranged in an overlapped mode, the flow speed of the heat conduction media between the heat regenerators can be guaranteed, sufficient heat exchange between the heat conduction media of the magnetic refrigeration modules of different levels can be achieved, and the model selection difficulty of the pump body can be reduced.

We provide a thermal interconnected redundant dual magnetic cooling system that eliminates the risk of a single point of failure causing a store-wide system shutdown, minimizes the impact on business operations during maintenance, and achieves further energy savings and efficiency. [Solution] The thermal interconnection redundant dual magnetic cooling system consists of two independent magnetic energy systems, a fluid switching valve unit, and an AI central control unit. It achieves "waste heat interconnection recovery" through an "independent and separated heat exchanger." The AI ​​control device automatically switches between normal mode, independent mode, and emergency mutual support mode according to demand, and the overall operation is not affected even if a single failure occurs. Compared to conventional systems, energy consumption is reduced by 35% to 50%, effectively reducing the user's operating costs.

The present application aims to provide a displacer device and a refrigerator which can achieve high efficiency of the refrigerator performance even when a magnetic refrigeration function is added and can be a compact device, the displacer device (10) being provided with a displacer (11) having a regenerator inside, the displacer (11) reciprocating in a housing container (50), thereby expanding the working fluid compressed in the housing container (50) to generate cold, wherein a magnetic refrigeration element (15) is provided at the low-temperature end side of the displacer (11), a magnetic circuit (40) which changes the magnetic state of the magnetic refrigeration element (15) is provided outside the housing container (50) corresponding to the magnetic refrigeration element (15), and the magnetic circuit (40) magnetizes and demagnetizes the magnetic refrigeration element (15) according to the position of the displacer (11).

This invention discloses a core-shell structured amorphous / nanocrystalline biphase rare-earth-based magnetic refrigeration material, its preparation method, and its applications, belonging to the field of magnetic refrigeration technology. The chemical formula of this material is Gd. x M y Cu z Where 90≤x≤95, 1≤y≤5, 1≤z<5, and y>z, and M is selected from any one of Fe, Co, and Ni; its microstructure is a core-shell dual-phase structure consisting of an amorphous shell encapsulating a nanocrystalline nucleus. This material exhibits more than two magnetic transition temperatures, and its magnetic entropy change curve shows two / three peaks, with a maximum magnetic entropy change of 5.4–6.9 J kg under a 5 T applied magnetic field. ‑1 K ‑1 The magnetic refrigeration temperature range reaches 106-220 K, with a relative refrigeration capacity of 731-1265 J / kg. This material combines high magnetic entropy change, wide refrigeration temperature range, excellent chemical stability, and high service reliability, making it suitable for widespread application as a magnetic refrigerant in the field of green solid-state refrigeration.