CN108709334A - A kind of electromagnetism field system for magnetic refrigerator - Google Patents
A kind of electromagnetism field system for magnetic refrigerator Download PDFInfo
- Publication number
- CN108709334A CN108709334A CN201810785773.3A CN201810785773A CN108709334A CN 108709334 A CN108709334 A CN 108709334A CN 201810785773 A CN201810785773 A CN 201810785773A CN 108709334 A CN108709334 A CN 108709334A
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- Prior art keywords
- iron core
- magnetic
- electromagnetic coil
- type iron
- field system
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- 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.)
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Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 83
- 238000009434 installation Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 230000005672 electromagnetic field Effects 0.000 claims description 3
- 230000005415 magnetization Effects 0.000 claims 1
- 230000004044 response Effects 0.000 abstract description 6
- 238000005057 refrigeration Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 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
-
- 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 kind of electromagnetism field systems for magnetic refrigerator, including electromagnetic coil, L-type iron core, column iron core, power supply and installation rack；The electromagnetic coil, L-type iron core and column iron core are installed on installation rack；The L-type iron core and column iron core cooperatively form c-type iron core, and electromagnetic coil is wrapped in the side of c-type iron core, and electromagnetic coil generates magnetic field after being powered, magnetic field magnetizes c-type iron core；The power supply is connected with the connecting terminal of electromagnetic coil, realizes direct voltage output；There is air gap, width of air gap can adjust, the active magnetic regenerator in magnetic refrigerator is mounted in air gap between the L-type iron core and column iron core.The present invention provides periodically stable magnetic field for magnetic working medium, and can be conveniently adjusted magnetic response characteristic.
Description
Technical field
The present invention relates to magnetic refrigeration technology field more particularly to a kind of electromagnetism field systems for magnetic refrigerator.
Background technology
Magnetic refrigeration is using the magnetothermal effect of solid-state magnetic material as refrigeration principle, is a kind of refrigeration skill with development prospect
Art.In conventional magnetic refrigerator design, magnetic field is provided by permanent magnet, once making and being completed, magnetic is rung permanent magnet
Answer characteristic just fixed and can not change, fluid, heat exchange and the debugging of magnetic response process compatible and cooperation of system and optimization by
Considerable restraint.Different from permanent magnet, the response characteristic of electromagnetic field can carry out the flexible modulation of wide scope (as risen as requested
With fall time, plateau time and frequency), for optimization system design strong means are provided with performance.However, at present simultaneously
There is no such system, this is the original intention and purpose of the present invention.
Invention content
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of electromagnetism field system for magnetic refrigerator.
The purpose of the present invention is achieved through the following technical solutions：A kind of electromagnetism field system for magnetic refrigerator,
Including electromagnetic coil, L-type iron core, column iron core, power supply and installation rack；The electromagnetic coil, L-type iron core and column iron core are equal
On installation rack；The L-type iron core and column iron core cooperatively form c-type iron core, and electromagnetic coil is wrapped in c-type iron core
Side, electromagnetic coil generate magnetic field after being powered, magnetic field magnetizes c-type iron core；The power supply is connected with the connecting terminal of electromagnetic coil
It connects, realizes direct voltage output；There is air gap, width of air gap can adjust, magnetic refrigeration between the L-type iron core and column iron core
Active magnetic regenerator in machine is mounted in air gap.
Further, the L-type iron core and column iron core are formed using silicon steel sheet stack add mode.
Further, the electromagnetic coil can effectively reduce the diameter using conducting wire using multiply and by the way of,
Conducting wire justifies enameled wire using magnetic soft copper.
Further, the adjustable range of width of air gap is 0~20mm between the L-type iron core and column iron core.
Further, the air gap between the L-type iron core and column iron core is adjusted by lifting screw, lifting screw installation
On installation rack, lifting screw is connect with column iron core, rotates the turntable of lifting screw and lifting screw is made to move up and down, to
Drive the lower movement in vertical direction of column iron core.
Further, the power supply realizes direct voltage output by transformer and current rectifying and wave filtering circuit, or passes through storage
Battery strings simultaneously combine realization direct voltage output.
Further, by IGBT bridges realize to electromagnetic coil power on and power process.
Further, which further includes control panel, and the control panel is connect with power supply, for controlling power supply ginseng
Number.
Further, which further includes Hall sensor, and it is current to detect electromagnetic coil by Hall sensor
Magnetic field intensity.
Further, which further includes current sensor, passes through electromagnetic coil by current sensor detection
Electric current current strength stability is ensured using Hysteresis control.
The beneficial effects of the invention are as follows：The present invention provides periodically stable magnetic field for the magnetic working medium of magnetic refrigerator, and can
To be conveniently adjusted magnetic response characteristic.Alternating current frequency may be implemented in 0.1~10Hz, magnetic field in the electromagnetism field system of the present invention
Rising edge and failing edge it is controllable, while the rise time in magnetic field is small, and electric current can be in square wave alternation between rated current and 0
Variation, while the lifting that can control column iron core in the present invention by lifting screw controls the width of air gap of c-type iron core, into
And adjust the magnetic field intensity in air gap.
Description of the drawings
Fig. 1 is electromagnetic field overall system architecture schematic diagram of the present invention；
Fig. 2 is power transformer scenario-frame schematic diagram；
Fig. 3 is battery of electric power scenario-frame schematic diagram；
Wherein, 1, electromagnetic coil, 2, L-type iron core, 3, column iron core, 4, power supply, 5, control panel, 6, installation rack, 7, rise
Screw rod drops, and 8, fixing bracket；9, transformer, 10, straightening and filtering unit, 11, storage capacitor, the 12, the first IGBT, 13, second
IGBT, the 14, the 3rd IGBT, the 15, the 4th IGBT；16, accumulator group, 17, upper IGBT, 18, current sensor, 19, upper afterflow two
Pole pipe, 20, lower IGBT, 21, lower fly-wheel diode.
Specific implementation mode
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, a kind of electromagnetism field system for magnetic refrigerator provided by the invention, including electromagnetic coil 1, L-type
Iron core 2, column iron core 3, power supply 4 and installation rack 6；The electromagnetic coil 1, L-type iron core 2 and column iron core 3 are installed in peace
It fills on rack 6；The L-type iron core 2 and column iron core 3 cooperatively form c-type iron core, and electromagnetic coil 1 is wrapped in the one of c-type iron core
Side, electromagnetic coil 1 generate magnetic field after being powered, magnetic field magnetizes c-type iron core, and magnetic flux converges to form a reinforcing magnetic field；The electromagnetism
Coil 1 can effectively reduce the diameter using conducting wire using multiply and by the way of, and conducting wire justifies enameled wire using magnetic soft copper；
The power supply 4 is connected with the connecting terminal of electromagnetic coil 1, realizes direct voltage output；The L-type iron core 2 and column iron core 3
Between gap be known as air gap, the distance of air gap upper and lower surface is known as width of air gap, and width of air gap can be adjusted, in magnetic refrigerator
Active magnetic regenerator be mounted on air gap in, electromagnetism field system provides magnetic field for magnetic refrigerator.
Further, the L-type iron core 2 and column iron core 3 are formed using silicon steel sheet stack add mode.
Further, the L-type iron core 2 and column iron core 3 are mounted on by fixing bracket 8 on installation rack 6.
Further, the adjustable range of width of air gap is 0~20mm between the L-type iron core 2 and column iron core 3.
Further, the air gap between the L-type iron core 2 and column iron core 3 is adjusted by lifting screw 7, lifting screw 7
On installation rack 6, lifting screw 7 is connect with column iron core 3, and the turntable of rotation lifting screw 7 can make lifting screw 7
It moves up and down, to drive the lower movement in vertical direction of column iron core 3, lifting screw 7 is by controlling column iron core 3 and L-type
The distance between iron core 2 adjusts air gap, and then influences the magnetic field intensity inside active magnetic regenerator.
Further, the power supply 4 realizes direct voltage output by transformer and current rectifying and wave filtering circuit, or passes through storage
Battery (lead-acid accumulator or lithium battery etc.) goes here and there and combines realization direct voltage output.
Further, by IGBT bridges realize to electromagnetic coil 1 power on and power process, open IGBT bridges when,
DC power supply is provided to electromagnetic coil 1, in 80-800V, electric current is continuously adjusted voltage between 10-100A, and electromagnetic coil 1 is made to produce
Raw periodicity stabilizing magnetic field；The response curve rise time in magnetic field is most short can to reach 20ms, fall time and rise time phase
Deng rise and fall slope of curve absolute value is equal, and the stable magnetic field time is adjustable, 0.1~10Hz of response frequency；In electromagnetic coil 1
After power-off, the energy discharged in electromagnetic coil 1 is recycled.
Further, which further includes control panel 5, and the control panel 5 is connect with power supply 4, for controlling electricity
Source parameter.
Further, which further includes Hall sensor, and it is current to detect electromagnetic coil 1 by Hall sensor
Magnetic field intensity, magnetic field intensity measurement accuracy are better than 1%.
Further, which further includes current sensor, passes through electromagnetic coil 1 by current sensor detection
Electric current current strength stability is ensured using Hysteresis control；Current sensor measurement range 0-120A, measurement accuracy are better than
0.5%.
There are two types of 4 embodiments of power supply.
Mode one is transformer scheme.As shown in Fig. 2, being filled by rectifying and wave-filtering after being boosted by transformer 9 by industrial electro
10 output maximum 800V DC voltages are set, the first IGBT 12 and the 4th IGBT 15 opened in driving circuit forms bridge circuit,
It powers on to electromagnetic coil 1, when 1 electric current of electromagnetic coil reaches requirements, is handled by PWM copped waves, maintain stabling current；It closes and drives
First IGBT 12 and the 4th IGBT 15 in dynamic circuit opens the 2nd IGBT 13 and the 3rd IGBT 14 and forms another bridge electricity
Road discharges the energy that electromagnetic coil 1 stores into storage capacitor 11.
Mode two is accumulator scheme.As shown in figure 3, power supply can also be realized by accumulator group 16, pass through the upper IGBT of opening
17 and lower IGBT 20 is powered on to electromagnetic coil 1, after current sensor 18 detects that electric current reaches demand current, passes through PWM copped waves
Processing, the switch of IGB T17 and lower IGBT 20 realize stabling current, maintenance stabilizing magnetic field in control；In disconnection IGBT17 and
Lower IGBT 20, electromagnetic coil 1 power off, and the energy stored in electromagnetic coil 1 passes through upper fly-wheel diode 19 and lower fly-wheel diode
In 21 release to accumulator groups 16.
Working principle of the present invention is as follows：
In the present invention, control panel 5 is theoretical according to magnetic circuit by controlling circuit control of the realization of power supply 4 to electromagnetism field system,
When electromagnetic coil 1 is powered, c-type iron core forms the uniform of some strength because electromagnetic induction forms magnetic loop in air gap
Magnetic field.In magnetic circuit, exciting current is alternating current, thus magnetomotive force in magnetic circuit and its magnetic flux that is encouraged at any time and
Alternation, thus the air-gap field intensity of c-type core interior changes over time, electric current friendship may be implemented in electromagnetism field system of the invention
Frequency is in 0.1~10Hz, and the rising edge and failing edge in magnetic field are controllable, while the rise time in magnetic field is small, and electric current can be in volume
Between constant current and 0 in square wave alternation change, while can be controlled by lifting screw in the present invention lifting of column iron core come
The width of air gap of c-type iron core is controlled, and then adjusts the magnetic field intensity in air gap.
When electromagnetism field system is applied to magnetic refrigerator, the period in magnetic field may be implemented in the alternative frequency by controlling electric current
Property variation.When electromagnetic coil 1 is powered, c-type iron core forms magnetic loop, and the uniform magnetic field of some strength, installation are formed in air gap
Excitation process is undergone in the active magnetic regenerator inner magnet working medium of the inter-air space and enters exothermic process；Then electromagnetic coil 1 is disconnected
Electricity, the magnetic field intensity inside c-type iron core air gap weaken rapidly, and active magnetic regenerator inner magnet working medium experience demagnetization process simultaneously enters
Endothermic process.
Embodiment 1：
For electromagnetic coil 1 using 28 strands and by the way of, per share conducting wire uses the line footpath of 1mm.Entire electromagnetic coil 1 can be with
It is equal to a series resistance and inductance, formula, which calculates, can show that the resistance of entire coil is 0.518 Ω, and inductance is
0.164H.Power supply 4 uses foregoing manner one, i.e. transformer scheme.As shown in Fig. 2, leading to after being boosted by transformer 9 by industrial electro
Over commutation filter 10 exports maximum 800V DC voltages, opens the first IGBT 12 and the 4th IGBT 15 in driving circuit
Bridge circuit is formed, powers on to electromagnetic coil 1, when 1 electric current of electromagnetic coil reaches requirements, is handled by PWM copped waves, maintains to stablize
Electric current；The first IGBT 12 and the 4th IGBT 15 in driving circuit is closed, the 2nd IGBT 13 and the 3rd IGBT 14 compositions are opened
Another bridge circuit discharges the energy that electromagnetic coil 1 stores into storage capacitor 11.According to equivalent LR series connection firstorder circuits
Principle reaches coil current 80A using 800V DC constant voltages, and the required time is t=L/R*ln (1/ (1-i*R/
U))=17.4ms, because the variation emulation of inductance value show that the time is about 20ms.Control electric current maintain stablize 80A time be
30ms, the time that control electric current maintains to stablize 0A is 30ms, and an operation is formed together with electric current rising and downslope time
Period 100ms realizes system frequency 0.1HZ；When width of air gap is 16mm, the magnetic field intensity maximum in air gap is up to 2T.
It is all in the present invention the foregoing is merely illustrating the example that has of the present invention, and non-limiting embodiments of the present invention
Any modifications, equivalent replacements and improvements made by within spirit and principle, should all be included within protection scope of the present invention.
Claims (10)
1. a kind of electromagnetism field system for magnetic refrigerator, which is characterized in that including electromagnetic coil, L-type iron core, column iron core,
Power supply and installation rack；The electromagnetic coil, L-type iron core and column iron core are installed on installation rack；The L-type iron core and
Column iron core cooperatively forms c-type iron core, and electromagnetic coil is wrapped in the side of c-type iron core, and electromagnetic coil generates magnetic field, magnetic after being powered
Field magnetization c-type iron core；The power supply is connected with the connecting terminal of electromagnetic coil, realizes direct voltage output；The L-type iron core
There is air gap, width of air gap can adjust between column iron core, the active magnetic regenerator in magnetic refrigerator is mounted in air gap.
2. a kind of electromagnetism field system for magnetic refrigerator according to claim 1, which is characterized in that the L-type iron core
It is formed using silicon steel sheet stack add mode with column iron core.
3. a kind of electromagnetism field system for magnetic refrigerator according to claim 1, which is characterized in that the electromagnetic coil
Using multiply and by the way of, conducting wire justifies enameled wire using magnetic soft copper.
4. a kind of electromagnetism field system for magnetic refrigerator according to claim 1, which is characterized in that the L-type iron core
The adjustable range of width of air gap is 0~20mm between column iron core.
5. a kind of electromagnetism field system for magnetic refrigerator according to claim 1, which is characterized in that the L-type iron core
Air gap between column iron core is adjusted by lifting screw, and lifting screw is mounted on installation rack, lifting screw and column
Iron core connect, rotating the turntable of lifting screw makes lifting screw move up and down, to drive column iron core in vertical direction under
Movement, lifting screw adjusts air gap by controlling the distance between column iron core and L-type iron core, and then influences active magnetic backheat
Magnetic field intensity inside device.
6. a kind of electromagnetism field system for magnetic refrigerator according to claim 1, which is characterized in that the power supply passes through
Transformer and current rectifying and wave filtering circuit realize direct voltage output, or by accumulator string and combine realization direct voltage output.
7. a kind of electromagnetism field system for magnetic refrigerator according to claim 6, which is characterized in that pass through IGBT bridges
Realize to electromagnetic coil power on and power process.
8. a kind of electromagnetism field system for magnetic refrigerator according to claim 1, which is characterized in that the electromagnetism field system
Further include control panel, the control panel is connect with power supply, for controlling power parameter.
9. a kind of electromagnetism field system for magnetic refrigerator according to claim 1, which is characterized in that the electromagnetism field system
Further include Hall sensor, electromagnetic coil current magnetic field intensity is detected by Hall sensor.
10. a kind of electromagnetism field system for magnetic refrigerator according to claim 1, which is characterized in that the electromagnetic field system
System further includes current sensor, ensures electric current using Hysteresis control by the electric current of electromagnetic coil by current sensor detection
Strength stability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810785773.3A CN108709334B (en) | 2018-07-17 | 2018-07-17 | Electromagnetic field system for magnetic refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810785773.3A CN108709334B (en) | 2018-07-17 | 2018-07-17 | Electromagnetic field system for magnetic refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108709334A true CN108709334A (en) | 2018-10-26 |
| CN108709334B CN108709334B (en) | 2023-11-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810785773.3A Active CN108709334B (en) | 2018-07-17 | 2018-07-17 | Electromagnetic field system for magnetic refrigerator |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116539942A (en) * | 2023-07-06 | 2023-08-04 | 深圳市知用电子有限公司 | Magnetic flux detection system and current sensor |
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| CN208547142U (en) * | 2018-07-17 | 2019-02-26 | 浙江磁石科技有限公司 | A kind of electromagnetism field system for magnetic refrigerator |
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| US20110048031A1 (en) * | 2009-08-28 | 2011-03-03 | General Electric Company | Magneto-caloric regenerator system and method |
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| CN116539942A (en) * | 2023-07-06 | 2023-08-04 | 深圳市知用电子有限公司 | Magnetic flux detection system and current sensor |
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| CN108709334B (en) | 2023-11-03 |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 366300 new industrial zone, Changting Economic Development Zone, Longyan City, Fujian Province Patentee after: Fujian Jinlong Rare Earth Co.,Ltd. Address before: 366300 new industrial zone, Changting Economic Development Zone, Longyan City, Fujian Province Patentee before: FUJIAN CHANGTING GOLDEN DRAGON RARE-EARTH Co.,Ltd. |