CN112629057A - Single-row multistage tandem double-magnetic-field magnetic refrigerator and heat exchange method thereof - Google Patents
Single-row multistage tandem double-magnetic-field magnetic refrigerator and heat exchange method thereof Download PDFInfo
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- CN112629057A CN112629057A CN202011633003.0A CN202011633003A CN112629057A CN 112629057 A CN112629057 A CN 112629057A CN 202011633003 A CN202011633003 A CN 202011633003A CN 112629057 A CN112629057 A CN 112629057A
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 57
- 239000010959 steel Substances 0.000 claims abstract description 57
- 238000005057 refrigeration Methods 0.000 claims abstract description 44
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 12
- 230000004907 flux Effects 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 9
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 5
- 150000002910 rare earth metals Chemical class 0.000 claims description 5
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 230000005347 demagnetization Effects 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 230000005415 magnetization Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 239000003507 refrigerant Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 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
- 238000001816 cooling 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
- 239000010409 thin film 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
- 241000282414 Homo sapiens Species 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
- 230000009977 dual effect 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
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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
- 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]
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- 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 tandem type double-magnetic-field magnetic refrigerator, which comprises: a refrigeration bin, a circulating system and a heat exchange system; the refrigeration bin includes: a magnetic field system and a working medium bed; the magnetic field system comprises: the double-magnetic-field single body is arranged in the refrigerating bin, the double-magnetic-field single body is sleeved on the outer side of the working medium bed, and the magnetic working medium is fixed in the working medium bed; the double-magnetic-field single body is a secondary magnetic field and comprises: the magnetic flux sensor comprises an outer yoke steel cylinder, an outer magnet, an inner yoke steel cylinder and an inner magnet; the inner yoke steel cylinder or the outer yoke steel cylinder is connected with a motor and a speed reducer; the heat exchange system comprises: heat exchanger, regenerator, circulation system includes: the diaphragm pump, first solenoid valve, second solenoid valve, third solenoid valve, fourth solenoid valve. The invention also discloses a heat exchange method of the single-row multistage tandem type double-magnetic-field magnetic refrigerator. The invention realizes the maximization of the magnetocaloric effect and greatly improves the working efficiency of magnetic refrigeration.
Description
Technical Field
The invention relates to the field of room-temperature magnetic refrigeration, in particular to a single-row multistage tandem type double-magnetic-field magnetic refrigerator and a heat exchange 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 completed in the heat accumulator, the refrigerant, namely the magnetic working medium, is not moved, and the thermodynamic cycle can be completed only by the change of the magnetic field intensity, so that the thermal fluid circulation system for magnetic field refrigeration greatly improves the refrigeration working efficiency.
However, the traditional magnetic refrigeration method has a complex mechanical structure, and the demagnetization of the magnetic working medium in the room-temperature magnetic field refrigeration is incomplete, so that the magnetocaloric effect is incomplete.
Disclosure of Invention
The invention aims to provide a single-row multistage tandem type double-magnetic-field magnetic refrigerator and a heat exchange method thereof, which realize the maximization of a magnetocaloric effect and greatly improve the working efficiency of magnetic refrigeration.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a single-train multistage tandem double-magnetic-field magnetic refrigerator comprising: a refrigeration bin, a circulating system and a heat exchange system; the refrigeration bin includes: a magnetic field system and a working medium bed; the magnetic field system comprises: the double-magnetic field single body is arranged in the refrigerating bin, and the double-magnetic field single body is sleeved on the outer side of the working medium bed; the working medium bed is of an airtight structure, and the magnetic working medium is fixed inside the working medium bed; the double-magnetic-field single body is a secondary magnetic field and comprises: the magnetic flux sensor comprises an outer yoke steel cylinder, an outer magnet, an inner yoke steel cylinder and an inner magnet; the outer magnet is fixed on the inner wall of the outer yoke steel cylinder, and the inner magnet is fixed on the inner wall of the inner yoke steel cylinder; the inner yoke steel cylinder is sleeved inside the outer yoke steel cylinder; the inner yoke steel cylinder is arranged on the first supporting seat, the outer yoke steel cylinder is arranged on the second supporting seat, the first supporting seat and the second supporting seat are fixed in the refrigerating bin, and the inner yoke steel cylinder or the outer yoke steel cylinder is connected with a motor and a speed reducer; the heat exchange system comprises: heat exchanger, regenerator, circulation system includes: the device comprises a diaphragm water pump, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve; the first electromagnetic valve, the third electromagnetic valve and the diaphragm water pump are connected in series on the pipeline, and the second electromagnetic valve, the fourth electromagnetic valve and the diaphragm water pump are connected in series on the pipeline and are respectively connected in parallel between the heat exchanger and the regenerator; 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.
Furthermore, flanges are welded at two ends of the working medium bed, the filter screen is installed on the flanges, a supporting plate is connected to the outer side of the flanges, and the bottom of the supporting plate is fixed to the refrigerating bin.
Furthermore, the magnetic working medium is a rare earth metal wire or a rare earth metal alloy wire, and the diameter of the magnetic working medium is 0.1mm-1 mm; and a diode refrigerating sheet is arranged in the refrigerating bin.
Further, a diode refrigeration piece for controlling the initial temperature of the refrigeration bin is arranged in the refrigeration bin, and the diode refrigeration piece is provided with a temperature sensor; the heat exchanger and the regenerator are provided with film platinum resistors for recording temperature changes.
Furthermore, a vacuum pressure gauge is arranged on the pipeline, the circulating system also comprises a programmable controller, and the motor, 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 respectively connected with the motor, 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 lines; 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.
The heat exchange method for the single-row multistage series double-magnetic-field magnetic refrigerator comprises the following steps:
the programmable controller starts the diaphragm water pump at one side of the regenerator, 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, the motor and the reducer drive the inner yoke steel cylinder or the outer yoke steel cylinder to rotate, the magnetic medium is demagnetized, and the magnetic medium is cooled;
the magnetic working medium absorbs the heat of the heat exchange fluid in the working medium bed, and the cooled heat exchange fluid enters the cold accumulator to reduce the temperature of the cold accumulator and realize refrigeration;
the programmable controller starts the membrane water pump at one side of the heat exchanger, opens the third electromagnetic valve and the fourth electromagnetic valve, and closes the first electromagnetic valve and the second electromagnetic valve;
the programmable controller starts the motor to rotate, the motor and the speed reducer drive the inner yoke steel cylinder or the outer yoke steel cylinder to rotate, the magnetic medium is magnetized, and the temperature of the magnetic medium 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 31, the temperature of the regenerator is raised, and heating is realized.
Preferably, the programmable controller controls the working medium bed to be repeatedly magnetized and demagnetized by controlling the relative position of the inner yoke steel cylinder or the outer yoke steel cylinder, and the magnetic working medium changes the temperature of the heat exchange fluid to realize continuous refrigeration and heating.
Preferably, the programmable controller controls the relative position of the inner yoke steel cylinder or the outer yoke steel cylinder by controlling the motor to rotate continuously or controlling the motor to rotate in the forward direction and the reverse direction.
The invention has the technical effects that:
1. the single-row multistage tandem type double-magnetic-field magnetic refrigerator provided by the invention can completely magnetize and demagnetize the magnetic working medium, improve the utilization rate of the magnetic heating effect of the magnetic working medium, realize the maximization of the magnetic heating effect and greatly improve the working efficiency of magnetic refrigeration.
2. In the traditional compressor refrigeration, a refrigerant is compressed by the compressor in an isentropic manner, then enters a condenser for cooling, enters a throttle valve, finally exits the throttle valve, enters an evaporator, and works according to the cycle, and four parts of the whole thermodynamic cycle are completed when the refrigerant passes through different mechanical parts. In the invention, the thermodynamic cycle of the magnetic refrigerator is completed in the refrigerating bin and the heat exchange system, and the thermodynamic cycle can be completed through the change of the magnetic field intensity, thereby greatly improving the refrigerating work efficiency.
Drawings
FIG. 1 is a schematic diagram of a single-row multistage tandem type double-magnetic-field magnetic refrigerator according to the present invention;
FIG. 2 is a schematic structural diagram of a dual field unit according to the present invention;
FIG. 3 is a schematic diagram of a single-train multi-stage tandem-type dual-field magnetic refrigerator according to the present invention;
fig. 4 is a schematic diagram of three magnetic field units arranged outside the magnetic field system of the present invention.
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 single-row multistage tandem type double-magnetic-field magnetic refrigerator according to the present invention. Fig. 2 is a schematic structural diagram of the dual-field single body according to the present invention.
A single-train multistage tandem double-magnetic-field magnetic refrigerator comprising: a refrigeration bin 1, a circulating system 2 and a heat exchange system; the refrigeration bin 1 changes the temperature of the magnetic working medium by using a magnetocaloric effect and transmits the cold energy or the heat energy generated by the magnetic working medium to the heat exchange fluid; the circulating system 2 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 brought out by the heat exchange fluid.
(1) The refrigerating compartment 1 comprises: magnetic field system 11, working medium bed 12, diode refrigeration piece 17.
The magnetic field system 11 comprises: a plurality of pairs of double-magnetic field single bodies and magnetic working media 16, wherein the double-magnetic field single bodies are sleeved on the outer side of the same working medium bed 12. The double-magnetic field single body is arranged in the refrigerating bin 1.
The double-magnetic-field single body is a secondary magnetic field and comprises: an outer yoke steel cylinder 111, an outer magnet 112, an inner yoke steel cylinder 113 and an inner magnet 114; the outer magnet 112 is fixed on the inner wall of the outer yoke steel cylinder 111, and the inner magnet 114 is fixed on the inner wall of the inner yoke steel cylinder 113; the inner yoke steel cylinder 113 is sleeved inside the outer yoke steel cylinder 111. The inner yoke steel cylinder 113 is installed on a first supporting seat, the outer yoke steel cylinder 111 is installed on a second supporting seat, the first supporting seat and the second supporting seat are fixed in the refrigerating bin 1, and the inner yoke steel cylinder 113 or the outer yoke steel cylinder 111 is connected with a motor and a speed reducer. The motor is powered by an external power supply.
The working medium bed 12 is of a closed structure and is connected with the circulating system 2 through a pipeline, flanges 14 are welded at two ends of the working medium bed, and a filter screen is installed on each flange 14; 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. The magnetic working medium 16 is fixed inside the working medium bed 12.
The motor drives the speed reducer to rotate, the speed reducer drives the inner yoke steel cylinder 113 to rotate, the magnetic fluxes of the outer magnet 112 and the inner magnet 114 are overlapped, the magnetic flux of the double-magnetic-field single body is changed, and the magnetic flux changes from the lowest magnetic field to the highest magnetic field.
When the magnetic working medium 16 is in the lowest magnetic field, the magnetic working medium (magnetic material) 16 is demagnetized, and the magnetic working medium 16 is cooled; when the magnetic working medium 16 is in the highest magnetic field, the magnetic working medium 16 is magnetized, the magnetic entropy is reduced, the lattice entropy is increased, the atom activity is aggravated, and the temperature of the magnetic material is increased. 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%, and gadolinium terbium and gadolinium erbium alloy wires with the diameter of 0.1mm-1mm can be assembled in sections.
The diode refrigeration piece 17 is used for controlling the initial temperature of the refrigeration bin 1, is provided with a temperature sensor, and starts refrigeration when the temperature inside the refrigeration bin 1 reaches 20 ℃, so that the magnetocaloric effect of the magnetic working medium 16 is protected.
FIG. 3 is a schematic diagram of a circulation system of a single-row multistage tandem type double-magnetic-field magnetic refrigerator according to the present invention.
(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 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 a pipeline and are powered by an external power supply.
The first electromagnetic valve 23, the third electromagnetic valve 25 and the diaphragm water pump 22 are connected in series on the pipeline, and the second electromagnetic valve 24, the fourth electromagnetic valve 26 and the diaphragm water pump 22 are connected in series on the pipeline and are respectively connected in parallel between the heat exchanger 31 and the regenerator 32; one end of the working medium bed 12 is connected between the first electromagnetic valve 23 and the third electromagnetic valve 25 through a pipeline, and the other end is connected between the second electromagnetic valve 24 and the fourth electromagnetic valve 26 through a pipeline.
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 and the fourth electromagnetic valve 26 through signal lines and is used for controlling the start and stop of the structure. The programmable controller controls the rotation direction and the action frequency of the motor at the same time so as to control the time 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 H2O, 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 the heat exchange fluid is controlled by the 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 is refrigerated, 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 for measuring the pressure of the heat exchange circulation system 2.
The diaphragm water pump 22 is used as a power source of the heat exchange fluid to provide power for the cold and hot circulation.
(3) And the heat exchange system 3 comprises: a heat exchanger 31 and a regenerator 32, wherein 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 thin film platinum resistors for recording temperature changes. A refrigeration case 33 is provided outside the regenerator 32.
As shown in FIG. 4, it is a schematic diagram of the present invention in which three double-magnetic-field single bodies are disposed outside the working medium bed 12.
At least one double-magnetic-field single body is arranged outside the working medium bed 12, and in the preferred embodiment, three double-magnetic-field single bodies are arranged outside the working medium bed 12.
The heat exchange method of single-row multistage series double-magnetic-field magnetic refrigerator includes the following steps:
step 1: the programmable controller starts the diaphragm water pump 22 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 in the forward direction, the motor and the speed reducer drive the inner yoke steel cylinder 113 or the outer yoke steel cylinder 111 to rotate in the forward direction, the magnetic medium 16 is demagnetized, and the magnetic medium 16 is cooled;
the magnetization or demagnetization is realized by the superposition of the magnetic fields of the outer magnet 112 and the inner magnet 114 or by changing the position of the magnetic field of the magnetic medium 16.
And step 3: the magnetic working medium 16 absorbs the heat of the heat exchange fluid in the working medium bed 12, the cooled heat exchange fluid enters the cold accumulator 32, the temperature of the cold accumulator 32 is reduced, and refrigeration is realized;
and 4, step 4: the programmable controller starts the membrane water pump 22 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;
and 5: the programmable controller starts the motor to rotate reversely, the motor and the reducer drive the inner yoke steel cylinder 113 or the outer yoke steel cylinder 111 to rotate reversely, the magnetic working medium 16 is magnetized, and the temperature of the magnetic working medium 16 is increased;
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, so that heating is realized;
and 7: the programmable controller controls the working medium bed 12 to repeatedly magnetize and demagnetize by controlling the relative position of the inner yoke steel cylinder 113 or the outer yoke steel cylinder 111, and the magnetic working medium 16 changes the temperature of the heat exchange fluid to realize continuous refrigeration and heating.
The start and stop of the diaphragm water pump 22 and the on-off 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 22 to flow 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 thin film platinum resistor, so that the refrigeration and the heating are realized.
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 (8)
1. A single-row multistage tandem type double-magnetic-field magnetic refrigerator is characterized by comprising: a refrigeration bin, a circulating system and a heat exchange system; the refrigeration bin includes: a magnetic field system and a working medium bed; the magnetic field system comprises: the double-magnetic field single body is arranged in the refrigerating bin, and the double-magnetic field single body is sleeved on the outer side of the working medium bed; the working medium bed is of an airtight structure, and the magnetic working medium is fixed inside the working medium bed; the double-magnetic-field single body is a secondary magnetic field and comprises: the magnetic flux sensor comprises an outer yoke steel cylinder, an outer magnet, an inner yoke steel cylinder and an inner magnet; the outer magnet is fixed on the inner wall of the outer yoke steel cylinder, and the inner magnet is fixed on the inner wall of the inner yoke steel cylinder; the inner yoke steel cylinder is sleeved inside the outer yoke steel cylinder; the inner yoke steel cylinder is arranged on the first supporting seat, the outer yoke steel cylinder is arranged on the second supporting seat, the first supporting seat and the second supporting seat are fixed in the refrigerating bin, and the inner yoke steel cylinder or the outer yoke steel cylinder is connected with a motor and a speed reducer; the heat exchange system comprises: heat exchanger, regenerator, circulation system includes: the device comprises a diaphragm water pump, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve; the first electromagnetic valve, the third electromagnetic valve and the diaphragm water pump are connected in series on the pipeline, and the second electromagnetic valve, the fourth electromagnetic valve and the diaphragm water pump are connected in series on the pipeline and are respectively connected in parallel between the heat exchanger and the regenerator; 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.
2. The single-row multistage tandem type double-magnetic-field magnetic refrigerator according to claim 1, wherein flanges are welded to both ends of the working medium bed, filter screens are installed on the flanges, a support plate is connected to the outer side of the flanges, and the bottom of the support plate is fixed to the refrigerating bin.
3. The single-row multistage series double-magnetic-field magnetic refrigerator according to claim 1, wherein the magnetic medium is a rare earth metal wire or a rare earth metal alloy wire, and the diameter is 0.1mm to 1 mm; and a diode refrigerating sheet is arranged in the refrigerating bin.
4. The single-row multistage series double-magnetic-field magnetic refrigerator according to claim 1, wherein a diode refrigeration piece for controlling the initial temperature of the refrigeration bin is provided inside the refrigeration bin, and the diode refrigeration piece is provided with a temperature sensor; the heat exchanger and the regenerator are provided with film platinum resistors for recording temperature changes.
5. The single-row multistage series double-magnetic-field magnetic refrigerator according to claim 1, wherein a vacuum pressure gauge is arranged on the pipeline, the circulating system further comprises a programmable controller, and the motor, 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 respectively connected with the motor, 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 lines; 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.
6. The heat exchange method of the single-row multistage tandem type double-magnetic-field magnetic refrigerator according to any one of claims 1 to 5, comprising:
the programmable controller starts the diaphragm water pump at one side of the regenerator, 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, the motor and the reducer drive the inner yoke steel cylinder or the outer yoke steel cylinder to rotate, the magnetic medium is demagnetized, and the magnetic medium is cooled;
the magnetic working medium absorbs the heat of the heat exchange fluid in the working medium bed, and the cooled heat exchange fluid enters the cold accumulator to reduce the temperature of the cold accumulator and realize refrigeration;
the programmable controller starts the membrane water pump at one side of the heat exchanger, opens the third electromagnetic valve and the fourth electromagnetic valve, and closes the first electromagnetic valve and the second electromagnetic valve;
the programmable controller starts the motor to rotate, the motor and the speed reducer drive the inner yoke steel cylinder or the outer yoke steel cylinder to rotate, the magnetic medium is magnetized, and the temperature of the magnetic medium 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 31, the temperature of the regenerator is raised, and heating is realized.
7. The heat exchange method of a single-row multistage series double-magnetic-field magnetic refrigerator as claimed in claim 6, wherein the programmable controller controls the repeated magnetization and demagnetization of the working medium bed by controlling the relative position of the inner yoke steel cylinder or the outer yoke steel cylinder, and the magnetic working medium changes the temperature of the heat exchange fluid to realize continuous refrigeration and heating.
8. The heat exchanging method of a single-row multistage series double-magnetic-field magnetic refrigerator as claimed in claim 7, wherein the programmable controller controls the relative position of the inner yoke steel cylinder or the outer yoke steel cylinder by controlling the motor to rotate continuously or by controlling the motor to rotate in forward and reverse directions.
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| CN202011633003.0A CN112629057B (en) | 2020-12-31 | 2020-12-31 | Single-row multistage serial double-magnetic-field magnetic refrigerator and heat exchange method thereof |
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| CN202011633003.0A CN112629057B (en) | 2020-12-31 | 2020-12-31 | Single-row multistage serial double-magnetic-field magnetic refrigerator and heat exchange method thereof |
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