CN112629056B - Refrigerating bin of double-row multistage serial magnetic refrigerator and refrigerating and heating method thereof - Google Patents
Refrigerating bin of double-row multistage serial magnetic refrigerator and refrigerating and heating method thereof Download PDFInfo
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- CN112629056B CN112629056B CN202011633002.6A CN202011633002A CN112629056B CN 112629056 B CN112629056 B CN 112629056B CN 202011633002 A CN202011633002 A CN 202011633002A CN 112629056 B CN112629056 B CN 112629056B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005057 refrigeration Methods 0.000 claims abstract description 28
- 239000000178 monomer Substances 0.000 claims abstract description 23
- 230000000694 effects Effects 0.000 claims abstract description 18
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims description 24
- 239000000126 substance Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000003507 refrigerant Substances 0.000 description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000005347 demagnetization Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 150000002910 rare earth metals Chemical group 0.000 description 3
- 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
- 229910052697 platinum Inorganic materials 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
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 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
- 239000010409 thin film Substances 0.000 description 1
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
-
- 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 refrigerating bin of a double-row multistage serial magnetic refrigerator, which comprises: magnetic field system, working medium bed, power device, working medium bed includes: the first working medium bed and the second working medium bed, the magnetic field system includes: the magnetic field monomers are divided into two groups and are respectively arranged at the outer sides of the first working medium bed and the second working medium bed; the two groups of magnetic field monomers are respectively fixed on two bases, and the bases are provided with gear grooves; the working medium beds are of a closed structure, a plurality of magnetic working mediums are divided into two groups and are respectively fixed inside the first working medium bed and the second working medium bed, and gaps are reserved among the magnetic working mediums; 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 invention also discloses a refrigerating and heating method of the refrigerating bin. The invention is applied to the double-row multistage serial magnetic refrigerator, 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 refrigeration bin of a double-row multistage serial magnetic refrigerator and a refrigeration and heating 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 refrigerating bin of a double-row multistage serial magnetic refrigerator and a refrigerating and heating method thereof, which are applied to the double-row multistage serial magnetic refrigerator, so that the maximization of the magnetocaloric effect is realized, and the magnetic refrigerating working efficiency is greatly improved.
In order to achieve the above purpose, the technical solution adopted by the invention is as follows:
the refrigeration storehouse of the multistage tandem type magnetic refrigerator of biserial, its characterized in that includes: magnetic field system, working medium bed, power device, working medium bed includes: the first working medium bed and the second working medium bed, the magnetic field system includes: the magnetic field monomers are divided into two groups and are respectively arranged at the outer sides of the first working medium bed and the second working medium bed; the two groups of magnetic field monomers are respectively fixed on two bases, and the bases are provided with gear grooves; the working medium beds are of a closed structure, a plurality of magnetic working mediums are divided into two groups and are respectively fixed inside the first working medium bed and the second working medium bed, and gaps are reserved among the magnetic working mediums; 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.
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.
Further, the method further comprises the following steps: the diode refrigerating sheet is used for controlling the initial temperature of the refrigerating bin and is provided with a temperature sensor, and the programmable controller is connected with the temperature sensor through a wire and is used for collecting data.
The refrigerating and heating method of the refrigerating bin comprises the steps that when a second working medium bed is refrigerated and a first working medium bed heats, a programmable controller controls motors corresponding to the first working medium bed and the second working medium bed to start, a speed reducer is matched with a gear, the speed reducer is matched with the gear to drive a magnetic field monomer outside the second working medium bed to move, the relative position of a magnetic working medium of the second working medium bed is moved to a gap position from a magnetic field position, and the temperature of the magnetic working medium is reduced under the demagnetizing effect; the relative position of the magnetic working medium of the first working medium bed is moved from the gap position to the magnetic field position, and the temperature of the magnetic working medium is increased under the magnetizing action.
Preferably, when the second working medium bed heats and the first working medium bed refrigerates, the relative position of the magnetic working medium of the second working medium bed moves from the gap position to the magnetic field position, and the temperature of the magnetic working medium rises under the magnetizing action; the relative position of the magnetic working medium of the first working medium bed is moved from the magnetic field position to the gap position, and the temperature of the magnetic working medium is reduced under the demagnetizing effect.
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 refrigerating bin provided by the invention is applied to a double-row multistage serial magnetic refrigerator, and can completely magnetize and demagnetize a magnetic working medium, so that the utilization rate of the magnetic heating effect of the magnetic working medium is improved, the maximization of the magnetic heating effect is realized, and the magnetic refrigerating working efficiency is greatly improved.
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.
3. The double-row serial magnetic refrigeration method greatly strengthens the magnetic refrigeration operation mode, improves the magnetic refrigeration efficiency, fully utilizes the magnetic refrigeration effect and effectively shortens the refrigeration time.
Drawings
FIG. 1 is a view showing the state of use of the refrigeration compartment of the present invention;
FIG. 2 is a schematic diagram of a power plant according to the present invention;
fig. 3 is a diagram of a circulation system of the present invention in which the refrigerating compartment is applied to the double-row multistage serial magnetic refrigerator.
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 refrigeration bin is used in the present invention. As shown in fig. 2, a schematic structural view of the power unit 13 according to the present invention is shown.
A refrigeration compartment of a double-row multistage tandem magnetic refrigerator, comprising: the magnetic field system 11, the working medium bed 12, the power device 13 and the diode refrigerating sheet 17.
The magnetic field system 11 comprises: a plurality of magnetic field monomers 17, gaps are reserved among the magnetic field monomers, and the magnetic fields of the magnetic field monomers 17 are identical in size and direction; the magnetic field unit 17 is divided into two groups which are respectively installed at the outer sides of the first working fluid bed 121 and the second working fluid bed 122. The magnetic field monomer 17 adopts a neodymium iron boron permanent magnet. The two sets of magnetic field monomers 17 are respectively fixed on two bases 15, and the bases 15 are provided with gear grooves 151. One group of bases 15 with magnetic field monomers 17 fixed thereto is located on both sides of the first working fluid bed 121, and the other group of bases 15 with magnetic field monomers 17 fixed thereto is located on both sides of the second working fluid bed 122. The two sets of magnetic field monomers 17 are staggered with respect to each other.
The working medium bed 12 is of a closed structure, is connected with the circulating system 2 through a pipeline, and is welded with flanges 14 at two ends, and a filter screen is arranged on the flanges; the outer side of the flange 14 is connected with a supporting plate, and the bottom of the supporting plate is fixed on the refrigerating bin 1; the plurality of magnetic field monomers are arranged outside the working substance beds 12, the plurality of magnetic working substances 16 are divided into two groups and respectively fixed inside the first working substance bed 121 and the second working substance bed 122, and gaps are reserved among the plurality of magnetic working substances 16.
Under the drive of the power device 13, the relative position of the magnetic working medium 16 and the magnetic field monomer 17 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 17, 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 131, a speed reducer 132 and a gear 133, wherein the gear 133 is meshed with the gear groove 151 and is used for driving the base 15 to move. The motor 131 provides power to the speed reducer 132, and the speed reducer 132 drives the gear 133 to rotate. The motor 131 is connected with the programmable controller through a signal wire, and the motor 131 is powered by an external power supply. The power device 13 is used for driving the magnetic field monomer to reciprocate so as to repeatedly magnetize/demagnetize the magnetic working medium 16.
The diode refrigerating sheet 18 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.
As shown in FIG. 3, the circulating system diagram of the refrigerating bin applied to the double-row multistage serial magnetic refrigerator in the invention is shown.
The refrigerating and heating method of the refrigerating bin specifically comprises the following steps:
step A: when the second working medium bed 122 is refrigerated and the first working medium bed 121 is heated, the programmable controller controls the motors 131 corresponding to the first working medium bed 121 and the second working medium bed 122 to start, the speed reducer 132 is matched with the gear 133 to drive the magnetic field monomer 17 outside the second working medium bed 122 to move, the relative position of the magnetic working medium 16 of the second working medium bed 122 is moved from the magnetic field position to the gap position, and the temperature of the magnetic working medium 16 is reduced under the demagnetizing effect; the relative position of the magnetic working medium 16 of the first working medium bed 121 is moved from the gap position to the magnetic field position, and under the magnetizing action, the temperature of the magnetic working medium 16 is increased;
and (B) step (B): when the second working medium bed 122 heats and the first working medium bed 121 refrigerates, the relative position of the magnetic working medium 16 of the second working medium bed 122 moves from the gap position to the magnetic field position, and the temperature of the magnetic working medium 16 rises under the magnetizing action; the relative position of the magnetic substance 16 of the first substance bed 121 is moved from the magnetic field position to the gap position, and the temperature of the magnetic substance 16 is lowered by the demagnetization.
A dual-row multistage tandem magnetic refrigerator comprising: the refrigerating bin 1, the circulating system 2 and the heat exchange system 3; 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 circulation system is connected with the heat exchange system 3 through a pipeline and is used for conveying heat exchange fluid to the heat exchange system 3; the heat exchange system 3 is used for exchanging cold or heat carried by the heat exchange fluid.
(2) The circulation system 2 includes: a programmable controller, a vacuum pressure gauge 21, a diaphragm water pump 22, a first electromagnetic valve 23, a second electromagnetic valve 24, a third electromagnetic valve 25, a fourth electromagnetic valve 26 and a fifth electromagnetic valve 27; 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 and the third electromagnetic valve 25 are connected in series, and two ends of the first electromagnetic valve 23 and the third electromagnetic valve 25 are respectively connected with the first working medium bed 121 and the second working medium bed 122 through pipelines; the second electromagnetic valve 24 and the fourth electromagnetic valve 26 are connected in series, and two ends of the second electromagnetic valve are respectively connected with the first working medium bed 121 and the second working medium bed 122 through pipelines; the diaphragm water pump 22 and the fifth electromagnetic valve 27 are connected in series, two ends of the diaphragm water pump are respectively connected with one end of the heat exchanger 31, and the other end of the heat exchanger 31 is connected with a pipeline between the first electromagnetic valve 23 and the third electromagnetic valve 25; the second electromagnetic valve 24, the fourth electromagnetic valve 26, the diaphragm water pump 22 and the fifth electromagnetic valve 27 are connected through pipelines.
The programmable controller is respectively connected with the motor, the vacuum pressure gauge 21, the diaphragm water pump 22, the first electromagnetic valve 23, the second electromagnetic valve 24, the third electromagnetic valve 25, the fourth electromagnetic valve 26 and the fifth electromagnetic valve 27 through signal wires and is used for controlling the start and stop of the structure. The programmable controller simultaneously controls the rotational direction and the frequency of motion of the motor to control the timing of the entry or exit of the magnetic working medium 16 into 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, the fourth electromagnetic valve 26 and the fifth electromagnetic valve 27 are direct-conduction electromagnetic valves, and the circulation of heat exchange fluid is controlled by the five direct-conduction electromagnetic valves.
The vacuum pressure gauge 21 is used to measure the pressure of the heat exchange circulation system 2.
The diaphragm water pump 22 is used as a power source of heat exchange fluid to provide power for the cold and hot cycles.
(3) The heat exchange system 3 includes: the outlet of the heat exchanger 31 is respectively connected with the fifth electromagnetic valve 27 and the diaphragm water pump 22, and the inlet of the heat exchanger 31 is connected with a pipeline between the first electromagnetic valve 23 and the third electromagnetic valve 25; the two ends of the cold accumulator 32 are respectively connected with the first working medium bed 121 and the second working medium bed 122 through pipelines.
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.
The heat exchange method of the double-row multistage serial magnetic refrigerator comprises the following steps:
step 1: when the second working medium bed 122 is refrigerated and the first working medium bed 121 is heated, the programmable controller controls the motors 131 corresponding to the first working medium bed 121 and the second working medium bed 122 to start, the speed reducer 132 is matched with the gear 133 to drive the magnetic field monomer 17 outside the second working medium bed 122 to move, the relative position of the magnetic working medium 16 of the second working medium bed 122 is moved from the magnetic field position to the gap position, and the temperature of the magnetic working medium 16 is reduced under the demagnetizing effect; the relative position of the magnetic working medium 16 of the first working medium bed 121 is moved from the gap position to the magnetic field position, and under the magnetizing action, the temperature of the magnetic working medium 16 is increased;
when the second working medium bed 122 heats and the first working medium bed 121 refrigerates, the relative position of the magnetic working medium 16 of the second working medium bed 122 moves from the gap position to the magnetic field position, and the temperature of the magnetic working medium 16 rises under the magnetizing action; the relative position of the magnetic substance 16 of the first substance bed 121 is moved from the magnetic field position to the gap position, and the temperature of the magnetic substance 16 is lowered by the demagnetization.
Step 2: the programmable controller starts the diaphragm water pump 22, and opens the first electromagnetic valve 23 and the fourth electromagnetic valve 26, and closes the second electromagnetic valve 24, the third electromagnetic valve 25 and the fifth electromagnetic valve 27; the heat exchange fluid is driven by the diaphragm pump 22 to enter the second working medium bed 122 from the fourth electromagnetic valve 26; the cooled heat exchange fluid enters the first working medium bed 121, the heated heat exchange fluid enters the heat exchanger 31 through the first electromagnetic valve 23, and the heat exchange fluid flows back to the diaphragm pump 22 to complete heat exchange.
The second solenoid valve 24 and the third solenoid valve 25 are opened, and the first solenoid valve 23, the fourth solenoid valve 26 and the fifth solenoid valve 27 are closed. The heat exchange fluid is driven by the diaphragm pump 22 to enter the first working medium bed 121 from the second electromagnetic valve 24; the cooled heat exchange fluid enters the second working medium bed 121, the heated heat exchange fluid enters the heat exchanger 31 through the third electromagnetic valve 25, and the heat exchange fluid flows back to the diaphragm pump 22 to complete heat exchange.
The start and stop of the diaphragm water pump 22 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, the fourth electromagnetic valve 26 and the fifth electromagnetic valve 27) are controlled by the programmable controller, the heat exchange fluid is driven by the diaphragm pump 22, 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 temperatures of the heat exchanger 31 and the cold accumulator 32 are 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 (4)
1. A refrigerating and heating method of a refrigerating bin of a double-row multistage serial magnetic refrigerator, which is characterized in that the refrigerating bin comprises: magnetic field system, working medium bed, power device, working medium bed includes: the device comprises a first working medium bed, a second working medium bed and a diode refrigerating sheet for controlling the initial temperature of a refrigerating bin, wherein flanges are welded at two ends of the working medium bed, a filter screen is arranged on the flanges, a supporting plate is connected to the outer side of each flange, and the bottom of each supporting plate is fixed on the refrigerating bin; the programmable controller is connected with the temperature sensor through a wire and is used for collecting data; the magnetic field system comprises: the magnetic field monomers are divided into two groups and are respectively arranged at the outer sides of the first working medium bed and the second working medium bed; the two groups of magnetic field monomers are respectively fixed on two bases, and the bases are provided with gear grooves; the working medium beds are of a closed structure, a plurality of magnetic working mediums are divided into two groups and are respectively fixed inside the first working medium bed and the second working medium bed, and gaps are reserved among the magnetic working mediums; 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; when the second working medium bed refrigerates and the first working medium bed heats, the programmable controller controls the motors corresponding to the first working medium bed and the second working medium bed to start, the speed reducer is matched with the gear to drive the magnetic field monomer outside the second working medium bed to move, the relative position of the magnetic working medium of the second working medium bed is moved from the magnetic field position to the gap position, and the temperature of the magnetic working medium is reduced under the demagnetizing effect; the relative position of the magnetic working medium of the first working medium bed is moved from the gap position to the magnetic field position, and the temperature of the magnetic working medium is increased under the magnetizing action.
2. The refrigerating and heating method of a refrigerating bin of a double-row multistage serial magnetic refrigerator according to claim 1, wherein when the second working medium bed heats and the first working medium bed refrigerates, the relative position of the magnetic working medium of the second working medium bed moves from a gap position to a magnetic field position, and the temperature of the magnetic working medium rises under the magnetizing action; the relative position of the magnetic working medium of the first working medium bed is moved from the magnetic field position to the gap position, and the temperature of the magnetic working medium is reduced under the demagnetizing effect.
3. The method for refrigerating and heating a refrigerating compartment of a double-row multistage serial magnetic refrigerator according to claim 1, wherein the programmable controller simultaneously controls the expansion frequency of the power device to control the time when the magnetic working medium enters or exits the magnetic field.
4. The method for refrigerating and heating a refrigerating compartment of a double-row multistage serial magnetic refrigerator according to claim 1, 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 refrigeration and heating by changing the temperature of the heat exchange fluid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011633002.6A CN112629056B (en) | 2020-12-31 | 2020-12-31 | Refrigerating bin of double-row multistage serial magnetic refrigerator and refrigerating and heating method thereof |
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| CN202011633002.6A CN112629056B (en) | 2020-12-31 | 2020-12-31 | Refrigerating bin of double-row multistage serial magnetic refrigerator and refrigerating and heating method thereof |
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| CN107270576A (en) * | 2017-07-03 | 2017-10-20 | 浙江磁石科技有限公司 | A kind of heat-exchange system of magnetic refrigerator |
| CN214371053U (en) * | 2020-12-31 | 2021-10-08 | 包头稀土研究院 | Refrigerating bin of double-row multistage tandem type magnetic refrigerator |
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