208 results about "Magnetic refrigeration" patented technology

The invention belongs to the technical field of rare earth functional materials, and particularly relates to a rare earth aluminate low-temperature magnetic refrigeration material and a preparation method and application thereof.The preparation method comprises the following steps that 1, rare earth metal nitrate and aluminum nitrate are added into water to be mixed, and a mixed solution is prepared; adding ammonia water into the mixed solution to prepare a precipitate; (2) carrying out annealing treatment on the precipitate to prepare a metal oxide; and (3) calcining the metal oxide to obtain the rare earth aluminate low-temperature magnetic refrigeration material. The rare earth aluminate which has the characteristics of stable structure, low preparation cost, strong mechanical property, high magnetic density and the like and is prepared by adopting a coprecipitation method and combining a high-temperature sintering technology has more excellent magnetocaloric properties in a low-temperature region.

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 discloses a robot parallel liquid cooling circulation system based on magnetic refrigeration. The robot parallel liquid cooling circulation system comprises a plurality of liquid cooling cavities, cold liquid, a magnetic refrigeration device and an air cooling device. The liquid cooling cavities are arranged at the positions of heat sources on the robot respectively and used for cooling the positions of the heat sources, and the liquid cooling cavities are arranged in parallel; the cold liquid is filled in the liquid cooling cavity channel; the magnetic refrigeration device is connected and conducted with the liquid cooling cavity channel and at least cools the cold liquid; and the air cooling device is connected and conducted with the magnetic refrigeration device to discharge heat for the magnetic refrigeration device. According to the liquid cooling circulation system, by additionally arranging the magnetic refrigeration device and the air cooling device, more efficient and lower-temperature cold liquid is provided for the robot, the lower-temperature refrigeration requirement of the robot is met, and normal work of the robot is ensured.

The invention discloses a gadolinium boron molybdate magnetic refrigeration material with triangular magnetic resistance and a preparation method and application of the gadolinium boron molybdate magnetic refrigeration material. The chemical formula of the material is Gd2B2MoO9, the material belongs to a triclinic system, and the space group is P-1; the crystal structure has the characteristic that nearest rare earth Gd ions have magnetic resistance file; the material is prepared by a solid phase method or a sol-gel method; the magnetic phase change temperature of the material is 0.7-0.9 K, the material shows a remarkable magnetothermal effect at low temperature, the maximum isothermal magnetic entropy change values of the material are 30.0-35.0 J / kg.K and 51.0-55.0 J / kg.K respectively under the magnetic field change of 0-2T and 0-5T, and the material can be applied to low-temperature magnetic refrigeration. The gadolinium boron molybdate Gd2B2MoO9 material with triangular magnetoresistance provided by the invention has the advantages of low raw material price, simple process and lower equipment requirement, and is suitable for industrial production.

The invention discloses a robot series liquid cooling circulation system based on magnetic refrigeration. The system comprises a plurality of liquid cooling cavity channels, a magnetic refrigeration device, an air cooling device and cold liquid; the liquid cooling cavities are arranged at the positions of heat sources on the robot and used for cooling the positions of the heat sources, and at least part of the liquid cooling cavities are arranged in series; the cold liquid is filled in the liquid cooling cavity channel; the magnetic refrigeration device is connected and conducted with the liquid cooling cavity channel and at least cools the cold liquid; and the air cooling device is connected and conducted with the magnetic refrigeration device to discharge heat for the magnetic refrigeration device. According to the liquid cooling circulation system, part of the liquid cooling cavities are connected in series, so that a liquid cooling network is relatively simple, fewer liquid pumps are adopted, and the cost is low.

The invention belongs to the technical field of magnetic refrigeration, and particularly discloses a rare earth europium-based zirconate magnetic refrigeration material and a preparation method and application thereof. The general chemical formula of the rare earth europium-based zirconate magnetic refrigeration material is (Eu1-xMx) (Zr1-yNy) O3, M is any one of Ca, Sr or Ba, N is any one of Nb, Ta, Ti or Hf, x is more than or equal to 0 and less than or equal to 0.5, y is more than or equal to 0 and less than or equal to 0.5, and the magnetic phase transition temperature of the rare earth europium-based zirconate magnetic refrigeration material is less than 10K. The magnetic refrigeration material shows excellent magnetocaloric performance near the liquid helium temperature, and is expected to be applied to the liquid helium temperature zone magnetic refrigeration technology; and the preparation method is simple in process, safe and environment-friendly, and can be applied to industrial production.

The invention relates to the technical field of heat insulation and demagnetization refrigeration, in particular to a heat insulation and demagnetization refrigeration material and a preparation method and application thereof. Wherein the heat insulation and demagnetization refrigeration material is an Eu2ZnGe2OS6 crystal. The heat insulation demagnetization refrigeration material is an Eu2ZnGe2OS6 crystal and has relatively small magnetic anisotropy, and a long-range magnetic orderliness phenomenon is not observed at 1.8 K or above. Compared with an existing traditional magnetic refrigeration material, when the magnetic field is adiabatically reduced from 7T to 0T, the material shows the maximum negative magnetic entropy difference as high as 43.11 J * kg <-1 > * K <-1 >, and has a wide development prospect in adiabatic demagnetizing refrigeration application in a 2-16K temperature zone and a sub-Kelvin temperature zone.

The application provides a single magnetic field operated high-efficiency regenerative full solid-state magnetic refrigeration device, which comprises at least one refrigeration unit, and the refrigeration unit comprises parallel arranged refrigeration layers and regenerative layers, wherein the refrigeration layer comprises a plurality of refrigeration pieces which are embedded in a first heat insulation material at intervals; the regenerative layer comprises a plurality of regenerative pieces which are embedded in a second heat insulation material, wherein refrigeration piece / regenerative piece=1, and the refrigeration unit is arranged so that the refrigeration layer and the regenerative layer make reciprocating translational motion respectively during operation, and the refrigeration pieces and the regenerative pieces have heat conduction therebetween. The magnetic refrigeration device of the application can operate under a single simple continuous magnetic field, the requirement for magnets is reduced, the device is more economical and environmentally friendly, and the device uses a plurality of regenerative pieces, the plurality of regenerative pieces simultaneously perform heat conduction at two motion terminals of cold and hot ends, the regenerative efficiency is greatly improved, and thus the regenerative factor and the refrigeration power density are improved.

The invention discloses a room temperature magnetic refrigeration demonstration instrument based on a magnetothermal effect and a use method thereof. A magnetizer and a magnetic field controller are electrically connected, the magnetizer is provided with a magnetic field test module, the top of the magnetizer is provided with a manual rocking handle, the middle part of the magnetizer is provided with an electromagnet magnetic field space, and the upper and lower parts of the electromagnet magnetic field space are provided with pole heads; the magnetizing time control module controls the action time of the magnetic field action module; the electromagnet magnetic field space is used for placing a magnetic refrigeration working medium; the manual rocking handle is used for fixing the magnetic refrigeration working medium; the magnetic field test module is a millteslameter, and the temperature control module is composed of a heating table and a non-metal thermal insulation layer; the temperature testing module is a temperature sensor; the adiabatic temperature change of the tested magnetic refrigeration working medium along with the application and revocation of the external magnetic field is visually displayed through a temperature sensor and a millteslameter. The demonstration instrument is low in cost, simple and convenient to operate and visual in demonstration mode, and the design pays attention to safety and environmental friendliness.

The invention discloses a La-Fe-Si-based magnetic refrigeration composite material based on an FHP technology and a preparation method thereof.The preparation method comprises the following steps that a La-Fe-Si-based magnetic refrigeration material with the particle size smaller than or equal to 100 microns is used as main phase particles, 0-5 wt% of pure Fe powder is added to serve as an adhesive, and pre-compaction is conducted after sufficient mixing; the particle size of the Fe powder is less than or equal to 20 microns; and the pre-compacted raw material powder is placed in an FHP rapid hot pressing sintering furnace, the vacuum degree lower than 10 <-3 > Pa is kept, high-temperature rapid hot pressing sintering forming is carried out under the continuous pressure of 10-100 MPa, secondary diffusion heat treatment is carried out in the protective atmosphere after cooling, and the La-Fe-Si-based magnetic refrigeration composite material is prepared. The FH P process is adopted, the high-temperature decomposition phenomenon of the 1: 13 phase is effectively inhibited, the pure Fe powder serves as a reaction type adhesive, the magnetocaloric performance and the mechanical performance of the block are further improved, and the comprehensive performance of the material is comprehensively improved.

The present invention discloses a method for preparing a rare earth-based multivalent manganese oxide low-temperature magnetic refrigeration material by a molten salt method, which relates to the technical field of magnetic functional materials. The steps are as follows: Weigh manganese dioxide powder and rare earth oxide powder according to the stoichiometric ratio of the rare earth-based multivalent manganese oxide, mix them with sodium chloride, and grind to obtain a mixed powder; sinter the mixed powder at a high temperature and cool it to room temperature with the furnace to obtain a sintered powder; wash the sintered powder with water to remove sodium chloride and dry it to obtain the product. The process of the present invention is simple and low in cost. The prepared rare earth-based multivalent manganese oxide has a large magnetocaloric effect near the liquid helium temperature range. Among them, the REMn2O5-type rare earth-based multivalent manganese oxide has an isothermal magnetic entropy change of up to 12.61 J kg ‑1 K ‑1 , and the relative cooling power RCP is up to 338 J kg ‑1 . It can be used as a low-temperature magnetic refrigeration material in low-temperature engineering, aerospace, medical devices and other fields.

The invention relates to the technical field of cooling systems, and provides a ship cooling system capable of being quickly regulated and controlled, which comprises a heat exchanger and a regenerator, the regenerator is connected with the heat exchanger, the regenerator is arranged on the upstream of the heat exchanger, a cooling medium flows through the regenerator and then enters the heat exchanger, and the regenerator cools the cooling medium according to the magnetic refrigeration principle or the phase change refrigeration principle. According to the ship cooling system capable of being adjusted and controlled rapidly, the cold accumulator is arranged on the upstream of the heat exchanger, the temperature of the cooling medium can be further reduced, more heat of the heat exchanger can be absorbed when the cooling medium flows through the heat exchanger, and therefore the temperature of the heat exchanger is reduced, and the heat exchanger operates safely and stably; and the influence of thermal shock on the service life of the heat exchanger is avoided.

The invention discloses a method capable of reducing the refrigeration interval of rare earth fluoride, and belongs to the field of magnetic functional materials. According to the method, diamagnetic ions K < + > are added into rare earth fluoride to reduce magnetic interaction among rare earth ions, so that a magnetic phase transformation point moves to a lower-temperature region, and a lower magnetic ordered temperature and a lower refrigeration interval are obtained while large magnetic entropy change is ensured. The series of materials are LnF3 (Ln = Tb, Dy, Ho, Er, Tm) powder samples and KLn1. 4F5.2 powder samples obtained after K < + > ions are introduced. In order to explore the influence of the addition of K < + > on the magnetic ordered temperature, a 100Oe variable magnetic field is respectively applied to the series of materials. The introduction of K < + > enables the Curivus temperature of the material to be obviously reduced to 3K or below. By comparing the effects of K < + > with different contents on the overall performance of the material, the optimal ratio of K / Gd is found, and under the optimal ratio of LnF3 series samples, before and after the K < + > is introduced, the changes of theta CW values are 4.34 to 2.04 K, 5.31 to 1.76 K, 8.31 to 2.54 K, 14.74 to 1.73 K and 3.59 to 1.75 K in sequence.

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 present invention discloses a compact room-temperature magnetic refrigerator, comprising: a cold-end heat exchanger, a left-side regenerator, an I-shaped magnet, a left-side hot-end heat exchanger, a left-side corrugated liquid storage tank, a left-side buffer pressurizer, an extension rod, a right-side buffer pressurizer, a right-side corrugated liquid storage tank, a right-side hot-end heat exchanger, and a right-side regenerator. The present invention also discloses a cooling method for the compact room-temperature magnetic refrigerator. The present invention utilizes a single drive source to drive the I-shaped magnet and drive and reverse the heat exchange fluid, thereby achieving the AMR cycle required for the room-temperature magnetic refrigerator.

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 invention discloses a stepped self-regenerative circulating system for room-temperature magnetic refrigeration, which comprises a magnet group, magnet group driving devices, a double-layer regenerator and regenerator driving devices, and the magnet group driving devices capable of driving the magnet group to reciprocate up and down are symmetrically connected to two sides of the magnet group. A high-magnetic-field-intensity air gap is formed in the magnet set, the double-layer heat regenerator is matched with the high-magnetic-field-intensity air gap, and the heat regenerator driving device is arranged on the left side of the double-layer heat regenerator and drives the heat regenerator to move left and right in a reciprocating mode. According to the cascade self-regenerative circulating system for room-temperature magnetic refrigeration, heat exchange fluid is thoroughly removed from the interior of the double-layer heat regenerator, one-way self-regenerative independent of additional elements in the double-layer heat regenerator under a reciprocating structure is achieved, meanwhile, cascade distribution of MCM infinitesimal cell temperature between the cold end and the hot end is achieved through the space-time matching design in the double-layer heat regenerator, and the heat exchange efficiency is improved. And the refrigerating capacity is effectively improved on the premise of ensuring the temperature span.

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.