CN115355630A - Multi-stage high-power magnetic machine and refrigeration method thereof - Google Patents
Multi-stage high-power magnetic machine and refrigeration method thereof Download PDFInfo
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- CN115355630A CN115355630A CN202210883344.6A CN202210883344A CN115355630A CN 115355630 A CN115355630 A CN 115355630A CN 202210883344 A CN202210883344 A CN 202210883344A CN 115355630 A CN115355630 A CN 115355630A
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000002245 particle Substances 0.000 claims description 32
- 239000012530 fluid Substances 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 16
- 239000000178 monomer Substances 0.000 claims description 9
- 230000005415 magnetization Effects 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 11
- 239000003507 refrigerant Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
- F25B2321/002—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects
- F25B2321/0022—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects with a rotating or otherwise moving magnet
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Abstract
The invention discloses a multistage high-power magnetic refrigerator, which comprises: the device comprises a rotary magnetic working medium bed assembly, a magnet, a cold accumulator, a radiator, a circulating pump, an electromagnetic valve group and a motor; the rotary magnetic working medium bed combination is connected between the cold accumulator and the radiator through a pipeline; the electromagnetic valve group is arranged on a pipeline between the radiator and the rotary magnetic working medium bed, or the electromagnetic valve group is arranged on a pipeline between the cold accumulator and the rotary magnetic working medium bed; the rotary magnetic work medium bed combination comprises a plurality of rotary magnetic work medium bed single bodies which are connected in parallel or in series, and the plurality of rotary magnetic work medium bed single bodies are respectively arranged in the working gaps of the plurality of magnets; the side part of the single body of the rotary magnetic working medium bed is provided with a rotating shaft which is connected with a motor. The invention also discloses a refrigeration method of the multistage high-power magnetic refrigerator. The invention can expand the working interval of the magnetocaloric effect and greatly improve the power of the magnetocaloric effect.
Description
Technical Field
The invention belongs to a magnetic refrigeration device, and particularly relates to a multistage high-power magnetic machine and a refrigeration method thereof.
Background
At present, the traditional compression refrigeration can cause damage to the ozone layer, and can indirectly cause the change of the living environment of human beings. Gas compression refrigeration uses a fluorine-free refrigerant, such as R410, according to the montreal protocol and the kyoto protocol. Although the new refrigerant no longer has an adverse effect on ozone, the new refrigerant can cause a greenhouse effect and still destroy the natural environment.
In the traditional compressed gas refrigeration, refrigerant is compressed by a compressor in an isentropic manner, then enters a condenser for cooling, enters a throttle valve, finally exits the throttle valve and enters an evaporator, and the refrigerant circularly works according to the principle that four parts of the whole thermodynamic cycle are completed when the refrigerant passes through different mechanical parts. The thermodynamic cycle of room temperature magnetic field refrigeration is to complete the cycle in the heat accumulator, and the thermodynamic cycle can be completed only by changing the magnetic field intensity without moving the refrigerant, i.e. the magnetic working medium; the traditional magnetic refrigeration system has the advantages of simple thermodynamic cycle system, low refrigeration efficiency, low refrigeration power and small magnetocaloric effect, and limits the popularization and the application of the room-temperature magnetic field refrigeration technology.
Disclosure of Invention
The invention aims to provide a multistage high-power magnetic machine and a refrigeration method thereof, which can expand the working interval of the magnetocaloric effect and greatly improve the power of the magnetocaloric effect.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a multi-stage high power magnetic refrigerator comprising: the rotary magnetic working medium bed comprises a rotary magnetic working medium bed combination, a magnet, a cold accumulator, a radiator, a circulating pump, an electromagnetic valve group and a motor; the rotary magnetic working medium bed combination is connected between the cold accumulator and the radiator through a pipeline; the electromagnetic valve group is arranged on a pipeline between the radiator and the rotary magnetic working medium bed, or the electromagnetic valve group is arranged on a pipeline between the cold accumulator and the rotary magnetic working medium bed; the rotary magnetic work medium bed combination comprises a plurality of rotary magnetic work medium bed single bodies which are connected in parallel or in series, and the plurality of rotary magnetic work medium bed single bodies are respectively arranged in the working gaps of the plurality of magnets; the rotating shaft is arranged on the side part of the rotating magnetic working medium bed single body and is connected with the motor.
Furthermore, the plurality of rotating magnetic working medium bed monomers are divided into a first working medium bed group and a second working medium bed group, and the plurality of rotating magnetic working medium bed monomers of the first working medium bed group or the second working medium bed group are connected in parallel or in series.
Further, the solenoid valve group sets up on the pipeline between radiator, rotatory magnetism working medium bed, and the solenoid valve group includes: the electromagnetic valve comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve and a sixth electromagnetic valve; the second electromagnetic valve and the fourth electromagnetic valve are connected in series on the pipeline between the first working medium bed group and the radiator through the pipeline, and the first electromagnetic valve and the third electromagnetic valve are connected in series on the pipeline between the second working medium bed group and the radiator through the pipeline; the circulating pump is arranged on a pipeline between the third electromagnetic valve and the radiator; one end of a fifth electromagnetic valve is connected to a pipeline between the first electromagnetic valve and the second working medium bed group, and the other end of the fifth electromagnetic valve is connected to a pipeline between the fourth electromagnetic valve and the radiator; the sixth electromagnetic valve is arranged on a pipeline between the second electromagnetic valve and the third electromagnetic valve.
Further, the rotary magnetic media bed unit includes: the refrigeration bed comprises a refrigeration bed body, a flange and a filter screen; the magnetic working medium particles at room temperature are filled in the refrigerating bed body, the flanges are connected to two ends of the refrigerating bed body, the filter screen is fixed between the refrigerating bed body and the flanges, and the flanges are connected with the pipeline; the refrigeration bed body comprises two arc-shaped split bodies which are connected together by using a flange; a flow channel is arranged in the flange, two flow channel openings of the flow channel are positioned on the inner side wall of the flange, and the two flow channel openings are respectively communicated with the two arc-shaped split bodies; the outer side wall of the flange is provided with a drainage tube, the drainage tube is positioned at the axis of the flange, and one end of the drainage tube is connected with the runner and the other end of the drainage tube is connected with a pipeline.
Further, the drainage tube is provided with the axial hole, and the axial hole is provided with a plurality of annular inside grooves, installs the sealing ring in the annular inside groove, and the pipeline is pegged graft at the axial downthehole, and the sealing ring is located between pipeline and the axial hole.
Furthermore, a pressing sealing ring is sleeved on the pipeline and positioned between the two sealing rings.
Furthermore, the pipeline adopts a hard copper pipe, and a pipeline bracket is arranged on the pipeline outside the drainage tube.
Further, the magnet includes: the inner-layer magnet and the two outer-layer semi-magnetic rings; the magnetization angles of the two outer-layer semi-magnetic rings are the same; the outer semi-magnetic ring includes: the magnetic field generator comprises an outer shielding layer and an outer semi-magnetic ring magnet, wherein an opening is formed in the side part of the outer shielding layer; the shape of the opening is circular; the outer half magnetic ring magnet is fixed in the outer shielding layer, a circular concave surface is arranged on the side part of the outer half magnetic ring magnet and is positioned at the opening, and the circular concave surfaces of the two outer half magnetic rings are opposite; the inlayer magnet is located between two arc concave surfaces, and the inlayer magnet includes: the inner shielding layer and the two half magnets are fixed in the inner shielding layer; the magnetizing angles of the two half magnets are the same, the half magnets are semicircular, and the outer side surfaces of the half magnets are arc convex surfaces; the gap between the inner layer magnet and the outer layer semi-magnetic ring forms a working air gap.
The refrigeration method of the multistage high-power magnetic refrigerator comprises the following steps:
the first electromagnetic valve, the third electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve are conducted, and the fifth electromagnetic valve and the sixth electromagnetic valve are closed; the motor drives the rotating magnetic working medium bed monomer to rotate, the arc-shaped split bodies of the first working medium bed group rotate towards the working air gap, the magnetic field intensity of the warm magnetic working medium particles acting in the arc-shaped split bodies starts to be enhanced, the room temperature magnetic working medium particles are heated, the arc-shaped split bodies of the first working medium bed group are heated, the heat exchange fluid of the first working medium bed group enters the radiator through the second electromagnetic valve and the fourth electromagnetic valve, and the heat exchange fluid after heat exchange enters the second working medium bed group through the third electromagnetic valve and the first electromagnetic valve; the arc-shaped split bodies of the second working medium bed group rotate in the direction away from the working air gap, the magnetic field intensity acting on the warm magnetic working medium particles in the arc-shaped split bodies begins to weaken, the warm magnetic working medium particles refrigerate, the arc-shaped split bodies of the second working medium bed group refrigerate, and the hot fluid of the second working medium bed group enters the cold accumulator;
the first electromagnetic valve is closed, the third electromagnetic valve is conducted, the second electromagnetic valve is conducted, the fourth electromagnetic valve is closed, the fifth electromagnetic valve is conducted, and the sixth electromagnetic valve is conducted; the motor continues to drive the rotating magnetic working medium bed monomer to rotate, the arc-shaped split bodies of the first working medium bed group rotate in the direction away from the working air gap, the magnetic field strength of the warm magnetic working medium particles in the arc-shaped split bodies begins to weaken, the room temperature magnetic working medium particles refrigerate, the first working medium bed group refrigerates, the heat exchange fluid in the radiator enters the first working medium bed group through the third electromagnetic valve, the sixth electromagnetic valve and the second electromagnetic valve, and the heat exchange fluid enters the cold accumulator after being grouped out of the first working medium bed after heat exchange is completed; the arc-shaped split bodies of the second working medium bed group rotate towards the direction of entering the working air gap, the magnetic field intensity acting on the room temperature magnetic working medium particles in the arc-shaped split bodies starts to be enhanced, the room temperature magnetic working medium particles heat, and the second working medium bed group heats; and the heat exchange fluid after heat exchange in the cold accumulator enters the second working medium bed to be grouped, and the heated heat exchange fluid enters the radiator through the fifth electromagnetic valve after being grouped out from the second working medium bed.
Preferably, in an initial state, the arc-shaped split bodies of the first working medium bed group are positioned outside the working air gap, and the arc-shaped split bodies of the second working medium bed group are positioned inside the working air gap.
The invention has the technical effects that:
the invention can expand the working interval of the magnetic thermal effect by two solid-state refrigerating beds which are matched for use, the refrigeration and the heating are mutually alternated, and the trend of the heat dissipation fluid is controlled by the electromagnetic valve group, thereby greatly improving the power of the magnetic thermal effect, realizing the maximization of the magnetic refrigeration power and greatly improving the working efficiency of the magnetic refrigeration.
The magnet of the invention adopts a closed magnetic field, thus solving the problem of magnetic leakage of the magnetic refrigeration test system. The inner layer magnet and the two outer layer half magnetic rings form a closed magnetic field, and an outer shielding layer and an inner shielding layer are added, so that magnetic leakage is effectively avoided; the magnetic field that outer half magnetic ring structure encloses has multilayer, and the edge is the no magnetic leakage. The size of the working air gap of the magnetic field can be adjusted, and the magnetic field intensity can be adjusted.
Drawings
FIG. 1 is a schematic diagram of a multi-stage high-power magnetic machine according to the present invention;
FIG. 2 is a schematic diagram of the structure of a single rotary magnetic media bed of the present invention;
FIG. 3 is a schematic view of the draft tube of the present invention;
FIG. 4 is a schematic view of the structure of a magnet in the present invention;
FIG. 5 is a schematic view of the arcuate split of the present invention shown spaced from the working air gap;
fig. 6 is a schematic view of the arc-shaped segments of the present invention positioned within the working air gap.
Detailed Description
The following description sufficiently illustrates specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.
Fig. 1 is a schematic diagram of a multistage high-power magnetic machine according to the present invention.
The structure of the multistage high-power magnetic machine comprises: the device comprises a rotary magnetic working medium bed assembly 1, a magnet 2, a regenerator 3, a radiator 4, a circulating pump 5, an electromagnetic valve group 6 and a motor 7; the rotary magnetic working medium bed assembly 1 is connected between the cold accumulator 3 and the radiator 4 through a pipeline; the electromagnetic valve group 6 is arranged on a pipeline between the radiator 4 and the rotary magnetic working medium bed 1, or the electromagnetic valve group 6 is arranged on a pipeline between the cold accumulator 3 and the rotary magnetic working medium bed 1 and is used for changing the flow direction of the heat exchange fluid; the rotary magnetic work medium bed assembly 1 comprises a plurality of rotary magnetic work medium bed single bodies 11, and the plurality of rotary magnetic work medium bed single bodies 11 are respectively arranged in the working gaps 23 of the plurality of magnets 2; the side part of the rotating magnetic working medium bed single body 11 is provided with a rotating shaft which is connected with the motor 7. The plurality of rotating magnetic working medium bed units 11 are divided into a first working medium bed group and a second working medium bed group.
The plurality of rotating magnetic working medium bed monomers 11 in the first working medium bed group and the second working medium bed group are connected in parallel or in series through pipelines. In the preferred embodiment, two rotating magnetic working medium bed monomers 11 are connected in parallel to form a rotating magnetic working medium parallel monomer, and the two rotating magnetic working medium parallel monomers are connected in series.
In the preferred embodiment, the electromagnetic valve set 6 is disposed on a pipeline between the radiator 4 and the rotary magnetic working machine 1, and the electromagnetic valve set 6 includes: a first solenoid valve 61, a second solenoid valve 62, a third solenoid valve 63, a fourth solenoid valve 64, a fifth solenoid valve 65, a sixth solenoid valve 66; the second electromagnetic valve 62 and the fourth electromagnetic valve 64 are connected in series on the pipeline between the first working medium bed group and the radiator 4 through the pipeline, and the first electromagnetic valve 61 and the third electromagnetic valve 63 are connected in series on the pipeline between the second working medium bed group and the radiator 4 through the pipeline; the circulating pump 5 is arranged on a pipeline between the third electromagnetic valve 63 and the radiator 4; one end of the fifth electromagnetic valve 65 is connected to the pipeline between the first electromagnetic valve 61 and the second working medium bed group, and the other end is connected to the pipeline between the fourth electromagnetic valve 64 and the radiator 4; the sixth solenoid valve 66 is provided on the line between the second solenoid valve 62 and the third solenoid valve 63.
As shown in fig. 2, a schematic diagram of the structure of the rotating magnetic media bed unit 11 according to the present invention is shown.
The rotary magnetic work bed unit 11 includes: a refrigeration bed body 111, a flange 112 and a filter screen 113; the magnetic working medium particles at room temperature are filled in the refrigerating bed body 111, the flange 112 is connected to two ends of the refrigerating bed body 111, the filter screen 113 is fixed between the refrigerating bed body 111 and the flange 112, and the flange 112 is connected with a pipeline; the refrigeration bed body 111 is made of a non-temperature-conducting material, the refrigeration bed body 111, the pipeline, the cold accumulator 3 and the radiator 4 form a closed flow channel, and heat exchange fluid is filled in the flow channel. The bottom of the flange 112 is connected with a support plate, and is connected and fixed on the base through the support plate.
The refrigeration bed body 111 comprises two arc-shaped split bodies 114, and the two arc-shaped split bodies 114 are connected together by using the flange 112.
A flow channel 115 is arranged in the flange 112, two flow channel openings of the flow channel 115 are positioned on the inner side wall of the flange 112, and the two flow channel openings are respectively communicated with the two arc-shaped split bodies 114; the outer side wall of the flange 112 is provided with a draft tube 116, the draft tube 116 is located at the axial center of the flange 112, and one end of the draft tube 116 is connected with the flow channel 115 and the other end is connected with a pipeline.
In the invention, the pipeline is made of hard copper pipes, and a pipeline bracket 8 is arranged on the pipeline outside the drainage tube 116 to support the hard copper pipes.
As shown in FIG. 3, a structural view of the draft tube 116 of the present invention is shown.
The draft tube 116 is provided with an axial bore 117, the axial bore 117 is provided with a plurality of annular inner grooves, a sealing ring 118 is installed in the annular inner grooves, the pipeline is inserted in the axial bore 117, and the sealing ring 118 is located between the pipeline and the axial bore 117. A pressing sealing ring 119 is sleeved on the pipeline, and the pressing sealing ring 119 is positioned between the two sealing rings 118; when heat exchange fluid permeates into the drainage tube 116 and the pipeline bracket, the heat exchange fluid presses the sealing ring 119 to be tightly attached to the sealing ring 118, so that the function of preventing the heat exchange fluid from permeating is achieved.
When the flange 112 rotates along with the rotating magnetic working medium bed single body 11, the drainage tube 116 rotates, the pipeline is static, and the sealing is realized by the sealing ring 118 and the pressing sealing ring 119, so that the heat exchange fluid in the cooling bed body 111 and the pipeline is prevented from leaking.
Fig. 4 is a schematic view showing the structure of the magnet 2 according to the present invention.
The magnet 2 includes: an inner magnet 22 and two outer semi-magnetic rings 21; the magnetization angles of the two outer half magnetic rings 21 are the same (the magnetic field directions are the same). The whole shape of outer semi-magnetic ring 21 is cuboid, includes: the magnetic field generator comprises an outer shielding layer 211 and an outer half magnetic ring magnet 212, wherein an opening is formed in the side of the outer shielding layer 211; the shape of the opening is circular. The outer half magnetic ring magnet 212 is fixed in the outer shielding layer 211, a circular concave surface 213 is arranged on the side of the outer half magnetic ring magnet 212, and the circular concave surface 213 is positioned at the opening. The circular concave surfaces 213 of the two outer half magnetic rings 21 are opposite.
The inner layer magnet 22 is located between the two arcuate concave surfaces 213.
The inner layer magnet 22 includes: the inner shielding layer 221 and the two half magnets 222, wherein the two half magnets 222 are fixed in the inner shielding layer 221; the two half magnets 222 have the same magnetization angle (the same magnetic field direction), and the half magnets 222 have a semicircular shape. The two half magnets 222 are opposite at the bottom, the bottom surface is a plane, and the outer side surface is an arc convex surface 223.
A working air gap 23 is formed by a gap between the inner-layer magnet 22 and the outer-layer semi-magnetic ring 21, and the working air gap 23 is a magnetic field working space.
The upper and lower sides of the inner shield layer 221 are respectively provided with a semicircular clamping groove, and the two half magnets 222 are respectively fixed in the semicircular clamping grooves according to the magnetization angle of 0 degree. The two outer shielding layers 211 are respectively fixed in the outer half magnetic ring magnet 212 according to the magnetization angle of 0 degree.
When the rotating magnetic working medium bed single body 11 rotates and is positioned in the working air gap 23, the magnetic field intensity acting on the warm magnetic working medium particles in the inner chamber of the cooling bed body 111 is the maximum, and when the rotating magnetic working medium bed single body leaves the working air gap 23, the magnetic field intensity acting on the warm magnetic working medium particles in the inner chamber of the cooling bed body 111 is 0. The room temperature magnetic working medium particles generate a magnetocaloric effect in the processes of excitation and demagnetization.
The outer shielding layer 211 and the inner shielding layer 221 are made of alloy, the thickness of the outer shielding layer is larger than 3mm, the outer half magnetic ring magnet 212 and the outer half magnet 222 are NdFeB magnets, the working point Ji of the NdFeB magnets is larger than or equal to 0.9Br, and the square degree of a demagnetization curve is close to 1.
As shown in fig. 5, it is a schematic view of the invention with the refrigeration bed body 111 away from the working air gap 23; as shown in fig. 6, it is a schematic view of the present invention with the refrigeration bed body 111 located in the working air gap 23.
The refrigeration method of the multistage high-power magnetic machine comprises the following specific steps:
step 1: the first solenoid valve 61, the third solenoid valve 63, the second solenoid valve 62 and the fourth solenoid valve 64 are conducted, and the fifth solenoid valve 65 and the sixth solenoid valve 66 are closed;
the motor 7 drives the rotating magnetic working medium bed single body 11 to rotate, the arc-shaped split bodies 114 of the first working medium bed group rotate towards the entering working air gap 23, the magnetic field intensity of the warm magnetic working medium particles acting in the arc-shaped split bodies 114 begins to be enhanced, the room temperature magnetic working medium particles are heated, the arc-shaped split bodies 114 of the first working medium bed group are heated, the heat exchange fluid of the first working medium bed group enters the radiator 4 through the second electromagnetic valve 62 and the fourth electromagnetic valve 64, and the heat exchange fluid after heat exchange enters the second working medium bed group through the third electromagnetic valve 63 and the first electromagnetic valve 61;
the arc-shaped split bodies 114 of the second working medium bed group rotate towards the direction leaving the working air gap 23, the magnetic field intensity of the room temperature magnetic working medium particles acting on the arc-shaped split bodies 114 begins to weaken, the room temperature magnetic working medium particles refrigerate, and the arc-shaped split bodies 114 of the second working medium bed group refrigerate; the hot fluid of the second working medium bed group enters the cold accumulator 3;
after the arc-shaped split bodies 114 of the first working medium bed group completely enter the working air gap 23, the magnetic field intensity of the warm magnetic working medium particles acting in the arc-shaped split bodies 114 reaches the maximum value; after the arc-shaped split bodies 114 of the second working medium bed group are completely separated from the working air gap 23, the magnetic field intensity of the temperature magnetic working medium particles in the arc-shaped split bodies 114 is 0. In an initial state, the arc-shaped split bodies 114 of the first working medium bed group are located outside the working air gap 23, and the arc-shaped split bodies 114 of the second working medium bed group are located inside the working air gap 23.
Step 2: the first solenoid valve 61 is closed, the third solenoid valve 63 is conducted, the second solenoid valve 62 is conducted, the fourth solenoid valve 64 is closed, the fifth solenoid valve 65 is conducted, and the sixth solenoid valve 66 is conducted;
the motor 7 continues to drive the rotating magnetic working medium bed single body 11 to rotate, the arc-shaped split bodies 114 of the first working medium bed group rotate towards the direction leaving the working air gap 23, the magnetic field intensity of the room-temperature magnetic working medium particles in the arc-shaped split bodies 114 begins to weaken, the room-temperature magnetic working medium particles refrigerate, the first working medium bed group refrigerates, the heat exchange fluid in the radiator 4 enters the first working medium bed group through the third electromagnetic valve 63, the sixth electromagnetic valve 66 and the second electromagnetic valve 62, and the heat exchange fluid enters the cold accumulator 3 after being divided from the first working medium bed after heat exchange is completed;
the arc-shaped split bodies 131 of the second working medium bed groups rotate towards the direction of entering the working air gap 23, the magnetic field intensity of the room temperature magnetic working medium particles acting on the arc-shaped split bodies 114 begins to be enhanced, the room temperature magnetic working medium particles are heated, and the second working medium beds are heated in groups; the heat exchange fluid which completes the heat exchange in the regenerator 3 enters the second working medium bed group, and the heated heat exchange fluid enters the radiator 4 through the fifth electromagnetic valve 65 after being grouped out from the second working medium bed.
The terminology used herein is for the purpose of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. A multi-stage high power magnetic refrigerator, comprising: the rotary magnetic working medium bed comprises a rotary magnetic working medium bed combination, a magnet, a cold accumulator, a radiator, a circulating pump, an electromagnetic valve group and a motor; the rotary magnetic working medium bed combination is connected between the cold accumulator and the radiator through a pipeline; the electromagnetic valve group is arranged on a pipeline between the radiator and the rotary magnetic working medium bed, or the electromagnetic valve group is arranged on a pipeline between the cold accumulator and the rotary magnetic working medium bed; the rotary magnetic work medium bed combination comprises a plurality of rotary magnetic work medium bed single bodies which are connected in parallel or in series, and the plurality of rotary magnetic work medium bed single bodies are respectively arranged in the working gaps of the plurality of magnets; the rotating shaft is arranged on the side part of the rotating magnetic working medium bed single body and is connected with the motor.
2. The multistage high power magnetic refrigerator according to claim 1, wherein the plurality of rotary magnetic working medium bed units are divided into a first working medium bed group and a second working medium bed group, and the plurality of rotary magnetic working medium bed units of the first working medium bed group or the second working medium bed group are connected in parallel or in series.
3. The multi-stage high power magnetic refrigerator of claim 1, wherein the solenoid valve block is disposed on a pipe between the heat sink and the rotary magnetic work bed, the solenoid valve block comprising: the electromagnetic valve comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve and a sixth electromagnetic valve; the second electromagnetic valve and the fourth electromagnetic valve are connected in series on the pipeline between the first working medium bed group and the radiator through the pipeline, and the first electromagnetic valve and the third electromagnetic valve are connected in series on the pipeline between the second working medium bed group and the radiator through the pipeline; the circulating pump is arranged on a pipeline between the third electromagnetic valve and the radiator; one end of a fifth electromagnetic valve is connected to a pipeline between the first electromagnetic valve and the second working medium bed group, and the other end of the fifth electromagnetic valve is connected to a pipeline between the fourth electromagnetic valve and the radiator; the sixth electromagnetic valve is arranged on a pipeline between the second electromagnetic valve and the third electromagnetic valve.
4. The multi-stage high power magnetic refrigerator of claim 1, wherein the rotating magnetic media bed unit comprises: the refrigeration bed comprises a refrigeration bed body, a flange and a filter screen; the magnetic working medium particles at room temperature are filled in the refrigerating bed body, the flanges are connected to two ends of the refrigerating bed body, the filter screen is fixed between the refrigerating bed body and the flanges, and the flanges are connected with the pipeline; the refrigeration bed body comprises two arc-shaped split bodies which are connected together by a flange; a flow channel is arranged in the flange, two flow channel openings of the flow channel are positioned on the inner side wall of the flange, and the two flow channel openings are respectively communicated with the two arc-shaped split bodies; the lateral wall of flange is provided with the drainage tube, and the drainage tube is located the axle center department of flange, and the other end connecting line of runner is connected to drainage tube one end.
5. The multi-stage high-power magnetic refrigerator according to claim 4, wherein the draft tube is provided with an axial inner hole, the axial inner hole is provided with a plurality of annular inner grooves, sealing rings are installed in the annular inner grooves, the pipeline is inserted in the axial inner hole, and the sealing rings are located between the pipeline and the axial inner hole.
6. The multi-stage high power magnetic refrigerator according to claim 5, wherein a compression seal ring is sleeved on the pipeline, and the compression seal ring is positioned between the two seal rings.
7. The multistage high-power magnetic refrigerator according to claim 1, wherein the pipeline is made of a hard copper pipe, and a pipeline support is arranged on the pipeline outside the drainage pipe.
8. The multi-stage high power magnetic refrigerator of claim 1, wherein the magnet comprises: the inner-layer magnet and the two outer-layer semi-magnetic rings; the magnetization angles of the two outer-layer semi-magnetic rings are the same; the outer semi-magnetic ring includes: the magnetic field generator comprises an outer shielding layer and an outer semi-magnetic ring magnet, wherein an opening is formed in the side part of the outer shielding layer; the shape of the opening is circular; the outer half magnetic ring magnet is fixed in the outer shielding layer, a circular concave surface is arranged on the side part of the outer half magnetic ring magnet and is positioned at the opening, and the circular concave surfaces of the two outer half magnetic rings are opposite; the inlayer magnet is located between two arc concave surfaces, and the inlayer magnet includes: the inner shielding layer and the two half magnets are fixed in the inner shielding layer; the magnetizing angles of the two half magnets are the same, the half magnets are semicircular, and the outer side surfaces of the half magnets are arc convex surfaces; and a working air gap is formed in a gap between the inner-layer magnet and the outer-layer semi-magnetic ring.
9. A method for refrigerating a multistage high power magnetic refrigerator according to any one of claims 1 to 8, comprising:
the first electromagnetic valve, the third electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve are conducted, and the fifth electromagnetic valve and the sixth electromagnetic valve are closed; the motor drives the rotating magnetic working medium bed monomer to rotate, the arc-shaped split bodies of the first working medium bed group rotate towards the working air gap, the magnetic field intensity of the warm magnetic working medium particles acting in the arc-shaped split bodies starts to be enhanced, the room temperature magnetic working medium particles are heated, the arc-shaped split bodies of the first working medium bed group are heated, the heat exchange fluid of the first working medium bed group enters the radiator through the second electromagnetic valve and the fourth electromagnetic valve, and the heat exchange fluid after heat exchange enters the second working medium bed group through the third electromagnetic valve and the first electromagnetic valve; the arc-shaped split bodies of the second working medium bed group rotate towards the direction leaving the working air gap, the magnetic field intensity acting on the warm magnetic working medium particles in the arc-shaped split bodies begins to weaken, the warm magnetic working medium particles refrigerate, the arc-shaped split bodies of the second working medium bed group refrigerate, and the hot fluid of the second working medium bed group enters the cold accumulator;
the first electromagnetic valve is closed, the third electromagnetic valve is conducted, the second electromagnetic valve is conducted, the fourth electromagnetic valve is closed, the fifth electromagnetic valve is conducted, and the sixth electromagnetic valve is conducted; the motor continues to drive the rotating magnetic working medium bed single body to rotate, the arc-shaped split bodies of the first working medium bed group rotate in the direction away from the working air gap, the magnetic field intensity of the warm magnetic working medium particles in the arc-shaped split bodies begins to weaken, the room temperature magnetic working medium particles refrigerate, the first working medium bed group refrigerates, the heat exchange fluid in the radiator enters the first working medium bed group through the third electromagnetic valve, the sixth electromagnetic valve and the second electromagnetic valve, and the heat exchange fluid enters the cold accumulator after being divided from the first working medium bed group after heat exchange is completed; the arc-shaped split bodies of the second working medium bed group rotate towards the direction of entering the working air gap, the magnetic field intensity acting on the room temperature magnetic working medium particles in the arc-shaped split bodies starts to be enhanced, the room temperature magnetic working medium particles heat, and the second working medium bed group heats; and the heat exchange fluid after heat exchange in the cold accumulator enters the second working medium bed to be grouped, and the heated heat exchange fluid enters the radiator through the fifth electromagnetic valve after being grouped out from the second working medium bed.
10. The refrigerating method of a multistage high power magnetic refrigerator according to claim 9, wherein in an initial state, the arc-shaped split bodies of the first working medium bed group are located outside the working air gap, and the arc-shaped split bodies of the second working medium bed group are located inside the working air gap.
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