CN112629058B - Single-row multistage serial magnetic refrigerator and heat exchange method thereof - Google Patents
Single-row multistage serial magnetic refrigerator and heat exchange method thereof Download PDFInfo
- Publication number
- CN112629058B CN112629058B CN202011633019.1A CN202011633019A CN112629058B CN 112629058 B CN112629058 B CN 112629058B CN 202011633019 A CN202011633019 A CN 202011633019A CN 112629058 B CN112629058 B CN 112629058B
- Authority
- CN
- China
- Prior art keywords
- electromagnetic valve
- working medium
- magnetic
- magnetic field
- heat exchange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000000178 monomer Substances 0.000 claims abstract description 40
- 238000005057 refrigeration Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000012530 fluid Substances 0.000 claims description 31
- 239000003638 chemical reducing agent Substances 0.000 claims description 12
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 229910052697 platinum Inorganic materials 0.000 claims description 5
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 5
- 150000002910 rare earth metals Chemical class 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 239000010409 thin film Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 239000003507 refrigerant Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 229910052688 Gadolinium Inorganic materials 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 229910001371 Er alloy Inorganic materials 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- RTXFQUKNVGWGFF-UHFFFAOYSA-N [Er].[Gd] Chemical compound [Er].[Gd] RTXFQUKNVGWGFF-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- HQWUQSSKOBTIHZ-UHFFFAOYSA-N gadolinium terbium Chemical compound [Gd][Tb] HQWUQSSKOBTIHZ-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a single-row multistage serial magnetic refrigerator, which comprises: the refrigerating bin, the circulating system and the heat exchange system; the refrigeration bin includes: a magnetic field system, a working medium bed and a power device; the magnetic field system comprises: at least one pair of magnetic field monomers and a magnetic working medium, wherein the working medium bed is of a closed structure, and the magnetic working medium is fixed in the working medium bed; the magnetic field monomer is arranged outside the working medium bed, and the power device is used for driving the magnetic field monomer to enter and exit the magnetic field of the magnetic field monomer; the heat exchange system includes: heat exchanger, regenerator, circulation system includes: the diaphragm water pump, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve; one end of the working medium bed is connected between the first electromagnetic valve and the third electromagnetic valve through pipelines, and the other end of the working medium bed is connected between the second electromagnetic valve and the fourth electromagnetic valve through pipelines. The invention also discloses a heat exchange method of the single-row multistage serial magnetic refrigerator. The invention realizes the maximization of the magnetocaloric effect and greatly improves the magnetic refrigeration working efficiency.
Description
Technical Field
The invention relates to the field of room temperature magnetic refrigeration, in particular to a single-row multistage serial magnetic refrigerator and a heat exchange method thereof.
Background
At present, the conventional compression refrigeration can cause harm to the ozone layer, which can indirectly lead to the change of the human living environment. According to the montreal protocol and the kyoto protocol, gas compression refrigeration uses a fluorine-free refrigerant, such as R410. Although the new refrigerating medium does not have adverse effect on ozone, the new refrigerating medium can cause greenhouse effect and still destroy natural environment.
Because in the traditional compressed gas refrigeration, the refrigerant is isentropically compressed by a compressor, 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 cycle, and 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 completed in the heat accumulator, the refrigerant, namely the magnetic working medium, is not moved, and the thermodynamic cycle can be completed only by changing the magnetic field intensity, so that the refrigeration working efficiency of the magnetic field refrigeration hot fluid circulation system is greatly improved.
However, the traditional magnetic refrigeration mode has a complex mechanical structure, the demagnetization of the magnetic working medium in the room-temperature magnetic field refrigeration is incomplete, and the magnetocaloric effect is incomplete.
Disclosure of Invention
The invention aims to provide a single-row multistage serial magnetic refrigerator and a heat exchange method thereof, which realize the maximization of the magnetocaloric effect and greatly improve the magnetic refrigeration working efficiency.
In order to achieve the above purpose, the technical solution adopted by the invention is as follows:
a single-train, multi-stage, tandem magnetic refrigerator comprising: the refrigerating bin, the circulating system and the heat exchange system; the refrigeration bin includes: a magnetic field system, a working medium bed and a power device; the magnetic field system comprises: at least one pair of magnetic field monomers and a magnetic working medium, wherein the working medium bed is of a closed structure, and the magnetic working medium is fixed in the working medium bed; the magnetic field monomer is arranged outside the working medium bed, and the power device is used for driving the magnetic field monomer to enter and exit the magnetic field of the magnetic field monomer; the heat exchange system includes: heat exchanger, regenerator, circulation system includes: the diaphragm water pump, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve; the first electromagnetic valve, the second electromagnetic valve and the diaphragm water pump are connected in series on the pipeline, and the third electromagnetic valve, the fourth electromagnetic valve and the diaphragm water pump are connected in series on the pipeline and are respectively connected between the heat exchanger and the cold accumulator in parallel; one end of the working medium bed is connected between the first electromagnetic valve and the third electromagnetic valve through pipelines, and the other end of the working medium bed is connected between the second electromagnetic valve and the fourth electromagnetic valve through pipelines.
Further, the magnetic field system comprises at least two pairs of magnetic field monomers and magnetic working media, gaps are reserved between the magnetic field monomers, and the magnetic fields of the magnetic field monomers are identical in size and direction; the magnetic working medium is fixed inside the working medium bed, and a gap is reserved between the magnetic working medium.
Further, the magnetic field monomer is fixed on a base, and the base is provided with a gear groove; the power device comprises: the motor, the speed reducer and the gear are meshed with the gear groove and used for driving the base to move; the motor provides power for the speed reducer, the speed reducer drives the gear to rotate, the gear drives the gear groove to reciprocate, and the gear groove drives the magnetic field monomer to reciprocate, so that the magnetic working medium is repeatedly magnetized/demagnetized; the motor is connected with a programmable controller through a signal wire, and the programmable controller is used for controlling the start and stop and the rotation direction of the motor.
Further, flanges are welded at two ends of the working medium bed, a filter screen is mounted on the flanges, a supporting plate is connected to the outer side of each flange, and the bottom of each supporting plate is fixed to the refrigerating bin.
Further, the magnetic working medium is rare earth metal wires or rare earth metal alloy wires, and the diameter is 0.1mm-1mm; the refrigerating bin is internally provided with a diode refrigerating sheet.
Further, a diode refrigerating sheet for controlling the initial temperature of the refrigerating bin is arranged in the refrigerating bin, and the diode refrigerating sheet is provided with a temperature sensor; the heat exchanger and the cold accumulator are provided with a thin film platinum resistor which is used for recording temperature change.
Further, a vacuum pressure gauge is arranged on the pipeline, and the circulating system further comprises a programmable controller, wherein the vacuum pressure gauge, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are powered by an external power supply; the programmable controller is connected with the vacuum pressure gauge, the diaphragm water pump, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve through signal wires respectively; the working medium bed, the pipeline, the heat exchanger and the cold accumulator are filled with heat exchange fluid, and a refrigeration box body is arranged outside the cold accumulator.
A heat exchange method of a single-column multistage serial magnetic refrigerator comprises the following steps:
the programmable controller starts a diaphragm water pump at one side of the cold accumulator, opens the first electromagnetic valve and the second electromagnetic valve, and closes the third electromagnetic valve and the fourth electromagnetic valve;
the programmable controller starts the motor to rotate forward, the motor and the speed reducer drive the gear to rotate, the gear drives the base and the working medium bed to move, the working medium bed drives the two magnetic working mediums to move from the magnetic field position of the magnetic field unit to the gap position, the magnetic working mediums are demagnetized, and the magnetic working mediums are cooled;
the magnetic working medium absorbs heat of heat exchange fluid in the working medium bed, the cooled heat exchange fluid enters the regenerator, the temperature of the regenerator is reduced, and refrigeration is realized;
the programmable controller starts a diaphragm water pump at one side of the heat exchanger, opens a third electromagnetic valve and a fourth electromagnetic valve, and closes the first electromagnetic valve and the second electromagnetic valve;
the programmable controller starts the motor to reversely rotate, the base drives the working medium bed to move, the working medium bed drives the two magnetic working mediums to move from the gap position to the magnetic field position of the magnetic field monomer, the magnetic working mediums are magnetized, and the temperature of the magnetic working mediums is raised;
the magnetic working medium heats the heat exchange fluid in the working medium bed, the heated heat exchange fluid enters the heat exchanger, and the temperature of the heat exchanger is increased to realize heating.
Preferably, the programmable controller simultaneously controls the expansion frequency of the power device to control the moment when the magnetic working medium enters or exits the magnetic field.
Preferably, the programmable controller controls the magnetic field of the working medium bed to repeatedly enter and exit the magnetic field monomer, the magnetic working medium is repeatedly magnetized and demagnetized, and the magnetic working medium realizes continuous refrigeration and heating by changing the temperature of the heat exchange fluid.
The technical effects of the invention include:
1. the single-row multistage serial magnetic refrigerator provided by the invention can completely magnetize and demagnetize the magnetic working medium, improves the utilization rate of the magnetocaloric effect of the magnetic working medium, realizes the maximization of the magnetocaloric effect, and greatly improves the magnetic refrigeration working efficiency.
2. In conventional compressor refrigeration, the refrigerant is isentropically compressed by the compressor, then enters the condenser for cooling, enters the throttle valve, finally exits the throttle valve, enters the evaporator, and operates according to the cycle in which four parts of the entire thermodynamic cycle are completed with the refrigerant passing through different mechanical parts. According to the invention, the thermodynamic cycle of the magnetic refrigerator is completed in the refrigeration bin and the heat exchange system, and the thermodynamic cycle can be completed through the change of the magnetic field intensity, so that the refrigeration working efficiency is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a single-train, multi-stage, serial magnetic refrigerator according to the present invention;
FIG. 2 is a diagram of a circulation system of a single-train multistage tandem magnetic refrigerator according to the present invention;
FIG. 3 is a schematic diagram of the present invention in which three magnetic field monomers are disposed outside the magnetic field system.
Detailed Description
The following description fully illustrates the specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.
As shown in FIG. 1, the structure of the single-column multistage serial magnetic refrigerator in the invention is schematically shown. As shown in FIG. 2, a cycle system diagram of a single-train multistage serial magnetic refrigerator according to the present invention is shown.
A single-train, multi-stage, tandem magnetic refrigerator comprising: the refrigerating bin 1, the circulating system 2 and the heat exchange system; the refrigeration bin 1 changes the temperature of the magnetic working medium by utilizing the magneto-thermal effect and transfers the cold or heat generated by the magnetic working medium to the heat exchange fluid; the circulating system is connected with the heat exchange system through a pipeline and is used for conveying heat exchange fluid to the heat exchange system; the heat exchange system is used for exchanging cold or heat carried by the heat exchange fluid.
(1) The refrigeration compartment 1 includes: the magnetic field system 11, the working medium bed 12, the power device 13 and the diode refrigerating sheet 17.
In the present preferred embodiment, the magnetic field system 11 comprises: the two magnetic field monomers are arranged at the outer side of the same working medium bed 12, a gap is reserved between the two magnetic field monomers, the magnetic field sizes of the two magnetic field monomers are identical in the same direction, and the two magnetic field monomers are arranged at the outer side of the same working medium bed 12. The magnetic field monomer adopts a neodymium iron boron permanent magnet. The two magnetic field monomers are fixed on the base, and the base is provided with a gear groove.
The working medium bed 12 is of a closed structure, is connected with the circulating system 2 through a pipeline, two ends of the working medium bed are welded with flanges 14, and the flanges 14 are provided with filter screens; the outer side of the flange 14 is connected with a supporting plate 15, and the bottom of the supporting plate 15 is fixed on the refrigerating bin 1; two magnetic field monomers are arranged on the outer side of the working medium bed 12, two magnetic working mediums 16 are fixed inside the working medium bed 12, and a gap is reserved between the two magnetic working mediums 16. Under the drive of the power device 13, the relative position of the magnetic working medium 16 and the magnetic field monomer changes, when the magnetic working medium 16 moves to a gap position, the magnetic working medium (magnetic material) 16 demagnetizes, and the magnetic working medium 16 is cooled; when the magnetic working medium 16 moves from the gap position to the magnetic field position of the magnetic field monomer, the magnetic working medium 16 is magnetized, the magnetic entropy is reduced, the lattice entropy is increased, the atomic activity is aggravated, and the temperature of the magnetic material is raised. The magnetic working medium 16 is made of rare earth metal gadolinium wires with the diameter of 0.1mm-1mm, the gadolinium component accounts for more than 99 percent, and gadolinium terbium and gadolinium erbium alloy wires can be assembled in sections with the diameter of 0.1mm-1mm.
The power device 13 comprises a motor, a speed reducer and a gear, and the gear is meshed with the gear groove and is used for driving the base to move. The motor provides power for the speed reducer, and the speed reducer drives the gear to rotate. The motor is connected with the programmable controller through a signal wire, and the motor is powered by an external power supply. The power device 13 is used for reciprocating motion of the magnetic field monomer, so that the magnetic working medium 16 is repeatedly magnetized/demagnetized.
The diode refrigerating sheet 17 is used for controlling the initial temperature of the refrigerating bin 1, is provided with a temperature sensor, and the internal temperature of the refrigerating bin 1 reaches 20 ℃ to start refrigerating, so that the magnetocaloric effect of the magnetic working medium 16 is protected.
(2) The circulation system 2 includes: a programmable controller, a vacuum pressure gauge 21, a diaphragm water pump 22-1, a diaphragm water pump 22-2, a first electromagnetic valve 23, a second electromagnetic valve 24, a third electromagnetic valve 25 and a fourth electromagnetic valve 26; the vacuum pressure gauge 21, the first electromagnetic valve 23, the second electromagnetic valve 24, the third electromagnetic valve 25 and the fourth electromagnetic valve 26 are sequentially arranged on the pipeline and are powered by an external power supply.
The first electromagnetic valve 23, the second electromagnetic valve 24 and the diaphragm water pump 22-1 are connected in series on a pipeline and connected between the heat exchanger 31 and the cold accumulator 32; the third electromagnetic valve 25, the fourth electromagnetic valve 26 and the diaphragm water pump 22-2 are connected in series on a pipeline and are connected between the heat exchanger 31 and the cold accumulator 32; the pipeline at one end of the working medium bed 12 is connected between the first electromagnetic valve 23 and the third electromagnetic valve 25, and the other end is connected between the second electromagnetic valve 24 and the fourth electromagnetic valve 26.
The programmable controller is respectively connected with the motor, the vacuum pressure gauge 21, the diaphragm water pump 22-1, the diaphragm water pump 22-2, the first electromagnetic valve 23, the second electromagnetic valve 24, the third electromagnetic valve 25 and the fourth electromagnetic valve 26 through signal wires and is used for controlling the start and stop of the structure. The programmable controller simultaneously controls the rotation direction and the action frequency of the motor on the power device 13 so as to control the moment when the magnetic working medium 16 enters or exits the magnetic field.
The working medium bed 12, the pipeline, the heat exchanger 31 and the cold accumulator 32 are filled with heat exchange fluid, and the main component of the heat exchange fluid is H 2 O, a small amount of alcohol may be added. The first electromagnetic valve 23, the second electromagnetic valve 24, the third electromagnetic valve 25 and the fourth electromagnetic valve 26 are direct-conduction electromagnetic valves, and the circulation of heat exchange fluid is controlled by four direct-conduction electromagnetic valves. When the magnetic working medium 16 heats, the third electromagnetic valve 25 and the fourth electromagnetic valve 26 are opened, and the first electromagnetic valve 23 and the second electromagnetic valve 24 are closed; when the magnetic working medium 16 refrigerates, the first electromagnetic valve 23 and the second electromagnetic valve 24 are opened, and the third electromagnetic valve 25 and the fourth electromagnetic valve 26 are closed.
The vacuum pressure gauge 21 is used to measure the pressure of the heat exchange circulation system 2.
The diaphragm water pump 22-1 and the diaphragm water pump 22-2 are used as power sources of heat exchange fluid to provide power for cold and hot circulation.
(3) The heat exchange system 3 includes: the heat exchanger 31 and the regenerator 32, the heat exchanger 31 is connected to the pipeline between the third electromagnetic valve 25 and the fourth electromagnetic valve 26, and the regenerator 32 is connected to the pipeline between the first electromagnetic valve 23 and the second electromagnetic valve 24.
The heat exchanger 31 and the regenerator 32 are provided with a thin film platinum resistor for recording a temperature change. The regenerator 32 is provided with a cooling tank 33 outside.
As shown in fig. 3, three magnetic field monomers are disposed outside the working fluid bed 12 in the present invention.
At least one magnetic field monomer is arranged outside the working fluid bed 12, and in the preferred embodiment, three magnetic field monomers are arranged outside the working fluid bed 12.
The heat exchange method of the single-row multistage serial magnetic refrigerator comprises the following steps:
step 1: the programmable controller starts the diaphragm water pump 22-1 at one side of the cold accumulator 32, opens the first electromagnetic valve 23 and the second electromagnetic valve 24, and closes the third electromagnetic valve 25 and the fourth electromagnetic valve 26;
step 2: the programmable controller starts the motor to rotate forward, the motor and the speed reducer drive the gear to rotate, the gear drives the base and the working medium bed 12 to move, and when the working medium bed 12 drives the two magnetic working mediums 16 to move from the magnetic field position of the magnetic field single body to the gap position, the magnetic working mediums 16 are demagnetized, and the magnetic working mediums 16 are cooled;
step 3: the magnetic working medium 16 absorbs heat of the heat exchange fluid in the working medium bed 12, the cooled heat exchange fluid enters the regenerator 32, the temperature of the regenerator 32 is reduced, and refrigeration is realized;
step 4: the programmable controller starts the diaphragm water pump 22-2 at one side of the heat exchanger 31, opens the third electromagnetic valve 25 and the fourth electromagnetic valve 26, and closes the first electromagnetic valve 23 and the second electromagnetic valve 24;
step 5: the programmable controller starts the motor to reversely rotate, the base drives the working medium bed 12 to move, the working medium bed 12 drives the two magnetic working mediums 16 to move from the gap position to the magnetic field position of the magnetic field monomer, the magnetic working mediums 16 are magnetized, and the temperature of the magnetic working mediums 16 is raised;
step 6: the magnetic working medium 16 heats the heat exchange fluid in the working medium bed 12, the heated heat exchange fluid enters the heat exchanger 31, and the temperature of the cold accumulator 32 is raised to realize heating;
step 7: the programmable controller controls the working medium bed 12 to repeatedly enter and exit the magnetic field of the magnetic field monomer through the power device 13, the magnetic working medium 16 is repeatedly magnetized and demagnetized, and the magnetic working medium 16 changes the temperature of the heat exchange fluid, so that continuous refrigeration and heating are realized.
The start and stop of the diaphragm water pump 22-1 and the diaphragm water pump 22-2 and the opening and closing time of the electromagnetic valves (the first electromagnetic valve 23, the second electromagnetic valve 24, the third electromagnetic valve 25 and the fourth electromagnetic valve 26) are controlled by the programmable controller, the heat exchange fluid is driven by the diaphragm pump, so that the heat exchange fluid flows into the heat exchanger 31 at the hot end and the cold accumulator 32 at the cold end, and the temperature of the heat exchanger 31 and the cold accumulator 32 is measured by the film platinum resistor, so that the refrigeration and the heating are realized.
The terminology used herein is for the purpose of description and illustration only and is not intended to be limiting. 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 (6)
1. A single-train, multi-stage, tandem magnetic refrigerator, comprising: the refrigerating bin, the circulating system and the heat exchange system; the refrigeration bin includes: the device comprises a magnetic field system, a working medium bed and a power device, wherein a diode refrigerating sheet for controlling the initial temperature of the refrigerating bin is arranged in the refrigerating bin, the diode refrigerating sheet is provided with a temperature sensor, a heat exchanger and a cold accumulator are provided with a thin film platinum resistor, and the thin film platinum resistor is used for recording temperature change; the magnetic field system comprises: at least two pairs of magnetic field monomers and a magnetic working medium, wherein the working medium bed is of a closed structure, and the magnetic working medium is fixed in the working medium bed; gaps are reserved among the magnetic field monomers, the magnetic fields of the magnetic field monomers are identical in size and direction, the magnetic working medium is fixed inside the working medium bed, and the gaps are reserved among the magnetic working medium; the magnetic field monomer is arranged outside the working medium bed, the power device is used for driving the magnetic field monomer to enter and exit the magnetic field of the magnetic field monomer, the magnetic field monomer is fixed on the base, and the base is provided with a gear groove; the power device comprises: the motor, the speed reducer and the gear are meshed with the gear groove and used for driving the base to move; the motor provides power for the speed reducer, the speed reducer drives the gear to rotate, the gear drives the gear groove to reciprocate, and the gear groove drives the magnetic field monomer to reciprocate, so that the magnetic working medium is repeatedly magnetized/demagnetized; the motor is connected with a programmable controller through a signal wire, and the programmable controller is used for controlling the start-stop and rotation directions of the motor; the heat exchange system includes: heat exchanger, regenerator, circulation system includes: the diaphragm water pump, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve; the first electromagnetic valve, the second electromagnetic valve and the diaphragm water pump are connected in series on the pipeline, and the third electromagnetic valve, the fourth electromagnetic valve and the diaphragm water pump are connected in series on the pipeline and are respectively connected between the heat exchanger and the cold accumulator in parallel; one end of the working medium bed is connected between the first electromagnetic valve and the third electromagnetic valve through a pipeline, and the other end of the working medium bed is connected between the second electromagnetic valve and the fourth electromagnetic valve through a pipeline; the pipeline is provided with a vacuum pressure gauge, the circulating system further comprises a programmable controller, and the vacuum pressure gauge, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are powered by an external power supply; the programmable controller is connected with the vacuum pressure gauge, the diaphragm water pump, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve through signal wires respectively; the working medium bed, the pipeline, the heat exchanger and the cold accumulator are filled with heat exchange fluid, and a refrigeration box body is arranged outside the cold accumulator.
2. The single-row multistage serial magnetic refrigerator of claim 1, wherein flanges are welded at both ends of the working fluid bed, the flanges are provided with filter screens, the outer sides of the flanges are connected with support plates, and the bottoms of the support plates are fixed on the refrigerating bin.
3. The single-row multistage serial magnetic refrigerator of claim 1, wherein the magnetic working medium is a rare earth metal wire or a rare earth metal alloy wire, and the diameter is 0.1mm-1mm.
4. A heat exchange method of a single-row multistage tandem magnetic refrigerator according to any one of claims 1 to 3, comprising:
the programmable controller starts a diaphragm water pump at one side of the cold accumulator, opens the first electromagnetic valve and the second electromagnetic valve, and closes the third electromagnetic valve and the fourth electromagnetic valve;
the programmable controller starts the motor to rotate forward, the motor and the speed reducer drive the gear to rotate, the gear drives the base and the working medium bed to move, the working medium bed drives the two magnetic working mediums to move from the magnetic field position of the magnetic field unit to the gap position, the magnetic working mediums are demagnetized, and the magnetic working mediums are cooled;
the magnetic working medium absorbs heat of heat exchange fluid in the working medium bed, the cooled heat exchange fluid enters the regenerator, the temperature of the regenerator is reduced, and refrigeration is realized;
the programmable controller starts a diaphragm water pump at one side of the heat exchanger, opens a third electromagnetic valve and a fourth electromagnetic valve, and closes the first electromagnetic valve and the second electromagnetic valve;
the programmable controller starts the motor to reversely rotate, the base drives the working medium bed to move, the working medium bed drives the two magnetic working mediums to move from the gap position to the magnetic field position of the magnetic field monomer, the magnetic working mediums are magnetized, and the temperature of the magnetic working mediums is raised;
the magnetic working medium heats the heat exchange fluid in the working medium bed, the heated heat exchange fluid enters the heat exchanger, and the temperature of the heat exchanger is increased to realize heating.
5. The heat exchange method of single-row multistage serial magnetic refrigerator of claim 4, wherein the programmable controller simultaneously controls the expansion frequency of the power device to control the timing of the magnetic working medium entering or exiting the magnetic field.
6. The heat exchange method of single-row multistage serial magnetic refrigerator of claim 4, wherein the programmable controller controls the magnetic field of the magnetic field unit to be repeatedly charged and discharged into and from the working medium bed, the magnetic working medium is repeatedly magnetized and demagnetized, and the magnetic working medium realizes continuous cooling and heating by changing the temperature of the heat exchange fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011633019.1A CN112629058B (en) | 2020-12-31 | 2020-12-31 | Single-row multistage serial magnetic refrigerator and heat exchange method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011633019.1A CN112629058B (en) | 2020-12-31 | 2020-12-31 | Single-row multistage serial magnetic refrigerator and heat exchange method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112629058A CN112629058A (en) | 2021-04-09 |
| CN112629058B true CN112629058B (en) | 2024-03-29 |
Family
ID=75289967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011633019.1A Active CN112629058B (en) | 2020-12-31 | 2020-12-31 | Single-row multistage serial magnetic refrigerator and heat exchange method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112629058B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484925B (en) * | 2021-12-08 | 2024-02-20 | 包头稀土研究院 | High-efficiency reaction type magnetic refrigerator and heat exchange method |
| CN114484922B (en) * | 2022-01-05 | 2024-02-23 | 中国科学院江西稀土研究院 | Solid-state refrigerating device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013029328A1 (en) * | 2011-08-30 | 2013-03-07 | 华南理工大学 | Swinging magnetic refrigerator under room temperature |
| KR20150125866A (en) * | 2014-04-30 | 2015-11-10 | 충북대학교 산학협력단 | Magnetic refrigeration system using concentric halbach cylinders |
| CN110617649A (en) * | 2019-09-09 | 2019-12-27 | 包头稀土研究院 | Heat circulation system of rotary room temperature magnetic refrigerator |
| CN214199268U (en) * | 2020-12-31 | 2021-09-14 | 包头稀土研究院 | Single-row multistage tandem magnetic refrigerator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2914051B1 (en) * | 2007-03-19 | 2009-05-08 | Cooltech Applic Soc Par Action | METHOD AND DEVICE FOR INCREASING THE TEMPERATURE GRADIENT IN A MAGNETOCALORIC THERMAL GENERATOR |
| WO2012056560A1 (en) * | 2010-10-29 | 2012-05-03 | 株式会社 東芝 | Magnetic refrigeration system |
| DE102015105345A1 (en) * | 2015-04-09 | 2016-10-13 | Eberspächer Climate Control Systems GmbH & Co. KG | Temperature control unit, in particular Fahrzeugtemperiergerät |
| JP2020193782A (en) * | 2019-05-29 | 2020-12-03 | 株式会社デンソー | Thermomagnetic cycle device |
-
2020
- 2020-12-31 CN CN202011633019.1A patent/CN112629058B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013029328A1 (en) * | 2011-08-30 | 2013-03-07 | 华南理工大学 | Swinging magnetic refrigerator under room temperature |
| KR20150125866A (en) * | 2014-04-30 | 2015-11-10 | 충북대학교 산학협력단 | Magnetic refrigeration system using concentric halbach cylinders |
| CN110617649A (en) * | 2019-09-09 | 2019-12-27 | 包头稀土研究院 | Heat circulation system of rotary room temperature magnetic refrigerator |
| CN214199268U (en) * | 2020-12-31 | 2021-09-14 | 包头稀土研究院 | Single-row multistage tandem magnetic refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112629058A (en) | 2021-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112629058B (en) | Single-row multistage serial magnetic refrigerator and heat exchange method thereof | |
| CN101458008B (en) | Magnetic cooling cycle system | |
| CN112629061B (en) | Magnetic field refrigeration heat exchange fluid circulation system and heat circulation method thereof | |
| CN214371050U (en) | Multi-row multi-stage parallel magnetic refrigerator | |
| JPS58108370A (en) | Method and device for operating cooling or heat pump | |
| CN109323504B (en) | Vertical air-cooled multi-temperature-zone refrigerator based on rotary magnetic refrigerator and control method thereof | |
| US20080276623A1 (en) | Magnetic refrigerant material | |
| CN105004093B (en) | A kind of Two-way Cycle reciprocating room temperature magnetic refrigerating system | |
| CN214199268U (en) | Single-row multistage tandem magnetic refrigerator | |
| CN214371053U (en) | Refrigerating bin of double-row multistage tandem type magnetic refrigerator | |
| CN214199262U (en) | Double-row multistage tandem magnetic refrigerator | |
| CN214199265U (en) | Single-row multistage tandem type refrigerating bin | |
| CN214371051U (en) | Double-row multistage tandem type double-magnetic-field magnetic refrigeration bin | |
| CN214371052U (en) | Double-row multistage tandem double-magnetic-field magnetic refrigerator | |
| CN214199263U (en) | Single-row multistage tandem type double-magnetic-field refrigerating bin | |
| CN214199264U (en) | Single-row multistage tandem double-magnetic-field magnetic refrigerator | |
| CN109539625B (en) | Adjustable type magnetic refrigeration device based on pulse magnetic field | |
| CN112594961A (en) | Double-row multistage tandem type magnetic refrigerator and heat exchange method thereof | |
| CN214199266U (en) | Magnetic field refrigeration heat exchange fluid circulation system | |
| CN112629062A (en) | Single-row multistage tandem type refrigerating bin and refrigerating and heating method thereof | |
| CN112629056B (en) | Refrigerating bin of double-row multistage serial magnetic refrigerator and refrigerating and heating method thereof | |
| CN112629057B (en) | Single-row multistage serial double-magnetic-field magnetic refrigerator and heat exchange method thereof | |
| CN112629060B (en) | Multi-row multi-stage parallel magnetic refrigerator and heat exchange method thereof | |
| CN112665210B (en) | Single-row multistage serial double-magnetic-field refrigerating bin and refrigerating and heating method thereof | |
| CN112594960B (en) | Double-row multistage serial double-magnetic field magnetic refrigerator and heat exchange method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |