CN112594963A - Cylindrical array type magnet for room temperature magnetic refrigerator and assembling method thereof - Google Patents
Cylindrical array type magnet for room temperature magnetic refrigerator and assembling method thereof Download PDFInfo
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- CN112594963A CN112594963A CN202011636874.8A CN202011636874A CN112594963A CN 112594963 A CN112594963 A CN 112594963A CN 202011636874 A CN202011636874 A CN 202011636874A CN 112594963 A CN112594963 A CN 112594963A
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- magnetic
- magnet
- metal shell
- array
- room temperature
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 43
- 230000005415 magnetization Effects 0.000 claims description 51
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 26
- 230000001174 ascending effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000005347 demagnetization Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0205—Magnetic circuits with PM in general
- H01F7/0221—Mounting means for PM, supporting, coating, encapsulating PM
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
- F25B2321/002—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects
- F25B2321/0021—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects with a static fixed magnet
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Abstract
The invention discloses a cylindrical array magnet for a room temperature magnetic refrigerator, which comprises: a magnetic block and a metal shell; the shape of the metal shell is a shape closed structure, even number of magnetic blocks are arranged on the inner wall of the metal shell to form a magnetic field array, and the middle part of the magnetic field array is a cylindrical air gap; end covers are arranged at two ends of the metal shell and pressed on the end faces of the magnetic blocks, and the magnetic field array forms a closed magnetic field in the cylindrical air gap. The invention also discloses an assembly method of the cylindrical array magnet for the room-temperature magnetic refrigerator. The cylindrical array type magnet obtained by the invention avoids the magnetic leakage phenomenon and greatly improves the magnetic field intensity.
Description
Technical Field
The invention relates to the field of room temperature magnetic refrigeration, in particular to a cylindrical array type magnet for a room temperature magnetic refrigerator and an assembly method thereof.
Background
At present, the research of the room temperature magnetic refrigerator mainly focuses on a reciprocating type magnetic refrigerator and a rotating type magnetic refrigerator, wherein a permanent magnetic field for the reciprocating type magnetic refrigerator is a partially closed magnetic circuit magnetic field, and a fully closed magnetic circuit magnetic field for the rotating type magnetic refrigerator is provided.
The most simple permanent magnet for magnetic refrigeration is a single magnet, and a space magnetic field is formed on the surface of a magnetic pole, but the magnetic flux density is low and is not uniform. In order to increase and obtain a uniform magnetic field, two magnets can be superposed to form a simple semi-closed magnetic circuit, but the method has low central magnetic field intensity and low refrigerating capacity.
Disclosure of Invention
The invention aims to provide a cylindrical array magnet for a room temperature magnetic refrigerator and an assembling method thereof, wherein the obtained cylindrical array magnet avoids the phenomenon of magnetic leakage and greatly improves the magnetic field intensity.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the cylindrical array type magnet for the room temperature magnetic refrigerator comprises: a magnetic block and a metal shell; the shape of the metal shell is a shape closed structure, even number of magnetic blocks are arranged on the inner wall of the metal shell to form a magnetic field array, and the middle part of the magnetic field array is a cylindrical air gap; end covers are arranged at two ends of the metal shell and pressed on the end faces of the magnetic blocks, and the magnetic field array forms a closed magnetic field in the cylindrical air gap.
Furthermore, the metal shell is cylindrical, the number of the magnetic blocks on the same layer is even, and the magnetic field array is composed of 3-5 layers of magnetic blocks.
Furthermore, the magnetic block is in the shape of an arc-surface cylinder, the inner side surface and the outer side surface are arc-shaped surfaces, and the end part is a rectangular surface.
Furthermore, the magnetic blocks are NdFeB magnetic blocks, and the NdFeB magnetic blocks on the same layer in the magnetic field array have different magnetization angles.
Further, the NdFeB magnetic block includes 4 magnetization angles of 0 °, 22 °, 67 °, and 90 °, respectively.
Further, two opposite magnets on the same layer in the magnetic field array are in mirror symmetry in space.
The assembling method of the cylindrical array type magnet for the room temperature magnetic refrigerator comprises the following steps:
the first pair of magnetic blocks are arranged in a metal shell, the outer cambered surfaces of the two magnetic blocks are tightly attached to the inner side wall of the metal shell, and the two opposite magnets are in mirror symmetry in space;
and taking out one magnetic block, and sequentially installing the rest magnetic blocks into the metal shell according to the descending or ascending sequence of the magnetization angle.
Preferably, the NdFeB magnetic block comprises 4 magnetization angles, which are respectively 0 °, 22 °, 67 ° and 90 °, and the steps comprise:
the outer arc surfaces of the magnetic blocks with the 90-degree magnetization angle are tightly attached to the inner side wall of the metal shell, and then the NdFeB magnets with the-90-degree magnetization angle are placed at opposite positions in an array mode;
after the magnetic block with the 90-degree magnetization angle is installed, loosening an adjusting nut in the middle of the adjusting mold, taking out the adjusting mold, and taking out the magnetic block with the-90-degree magnetization angle on the opposite side; and sequentially installing the rest magnetic blocks into the metal shell according to the descending or ascending sequence of the magnetization angle.
Preferably, the NdFeB magnet block is assembled according to the Halbach rotation theory, and the installation sequence is as follows: a magnetic block with a 90-degree magnetization angle, a magnetic block with a 67-degree magnetization angle, a magnetic block with a 22-degree magnetization angle, two magnetic blocks with a 0-degree magnetization angle, a magnetic block with a-22-degree magnetization angle, a magnetic block with a-67-degree magnetization angle, and a magnetic block with a-90-degree magnetization angle.
Preferably, the two ends of the adjusting mould are provided with a supporting plate and a stud bolt, the stud bolt is provided with an adjusting nut, and the two ends of the stud bolt are connected with the supporting plate; the adjusting mold is placed in the metal shell, the two magnetic blocks are placed on two sides of the adjusting mold, and the magnetic blocks are pressed on the inner wall of the metal shell through the supporting plate.
The invention has the technical effects that:
the invention is provided for the magnetic field system of the existing reciprocating magnetic refrigerator, the magnetic field system of the existing reciprocating magnetic refrigerator has simple structure, no airtight space and serious magnetic leakage; therefore, in order to solve the magnetic leakage phenomenon, the invention provides a scheme of adopting a metal shell to seal a magnetic field, so that the magnetic leakage phenomenon is avoided, and the magnetic field intensity is greatly improved.
The cylindrical array type magnet for the room temperature magnetic refrigerator has the characteristics of no magnetic leakage in the center, high magnetic field intensity, closed magnetic field and the like. The magnet block is under the effect of backup pad, through adjusting nut with magnet fixed mounting on metal casing, has improved assembly work efficiency.
Drawings
Fig. 1 is a schematic structural view of a cylindrical array magnet for a room temperature magnetic refrigerator in accordance with 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.
The cylindrical array magnetic field is developed by adopting a magnetism gathering theory, the smaller the angle between the magnetic blocks and the magnetization direction of the magnetic blocks is, the more uniform the formed magnetic field is, and the higher the magnetic flux density is, so that the magnetic force lines can be fully gathered. On the basis of the magnetic circuit, the number of the magnets can be increased, and a uniform magnetic field which has good magnetic refrigeration capacity and is converged in the same direction can be obtained.
As shown in fig. 1, it is a schematic structural view of a cylindrical array magnet for a room temperature magnetic refrigerator in the present invention.
The cylindrical array type magnet for the room temperature magnetic refrigerator comprises: the magnetic block 1 and the metal shell 2; the shape of the metal shell 2 is a cylindrical closed structure, an even number of magnetic blocks 1 are arranged on the inner wall of the metal shell 2 to form a magnetic field array, and the middle of the magnetic block array is a cylindrical air gap 3.
The number of the magnetic blocks 1 on the same layer is even, and the magnetic field array is composed of 3-5 layers of the magnetic blocks 1. The magnetic block 1 is in the shape of an arc-surface cylinder, the inner side surface and the outer side surface are arc-shaped surfaces, and the end part is a rectangular surface.
The magnetic block 1 is an NdFeB magnetic block, the NdFeB magnetic block has different magnetization angles, and the 4 magnetization angles are 0 degree, 22 degrees, 67 degrees and 90 degrees respectively. The assembly sequence of the NdFeB magnetic blocks is as follows: the magnetization angle is 90 degrees, 67 degrees, 22 degrees, 0 degrees, 22 degrees, 67 degrees and 90 degrees. The magnetic field is designed into a cylindrical array structure, and two opposite magnets 1 are in mirror symmetry in space.
The metal shell 2 is of a closed structure, end covers are arranged at two ends of the metal shell, the end covers are pressed on the end faces of the magnetic blocks 1, and the cylindrical array type magnets form a closed magnetic field in the cylindrical air gaps 3. The thickness of the metal housing 2 is greater than 1.5 mm.
The working point Ji of the magnetic block 1 is more than or equal to 0.9Br, and the square degree of a demagnetization curve is close to 1.
The assembling method of the cylindrical array type magnet for the room temperature magnetic refrigerator comprises the following specific steps:
step 1: the outer arc surface of a magnetic block 1(NdFeB magnet) with a 90-degree magnetization angle is tightly attached to the inner side wall of a metal shell 2, and then the NdFeB magnet with the-90-degree magnetization angle is placed at a relative position in an array mode;
the two ends of the adjusting die are provided with a supporting plate and a supporting bolt, the supporting bolt is provided with an adjusting nut, the supporting bolt is a stud, the two ends of the stud are connected with the supporting plate, the two magnetic blocks 1 in the same magnetic field direction can be installed in the metal shell 2 by rotating the adjusting nut, and the supporting plate presses the two magnetic blocks 1 on the inner wall of the metal shell 2. The adjusting mold is placed in a metal shell 2, two magnetic blocks 1 with the same magnetic field direction are placed on two sides of the adjusting mold, and the magnetic blocks 1 are pressed on the inner wall of the metal shell 2 through the adjusting mold.
Step 2: after the magnetic block 1 with the 90-degree magnetization angle is installed, loosening an adjusting nut in the middle of an adjusting mold, taking out the adjusting mold, and then taking out the magnetic block 1 with the-90-degree magnetization angle on the opposite side;
and step 3: and sequentially installing the rest magnetic blocks 1 into the metal shell 2 according to the descending or ascending sequence of the magnetization angle.
The NdFeB magnetic block is assembled according to a Halbach rotation theory, and the installation sequence is as follows: the magnetic block 1 with the magnetization angle of 90 degrees, the magnetic block 1 with the magnetization angle of 67 degrees, the magnetic block 1 with the magnetization angle of 22 degrees, the magnetic blocks 1 with the magnetization angles of 0 degrees, the magnetic block 1 with the magnetization angle of-22 degrees, the magnetic block 1 with the magnetization angle of-67 degrees and the magnetic block 1 with the magnetization angle of-90 degrees.
Placing the side edge of the NdFeB magnet with the magnetizing angle of 67 degrees close to the NdFeB magnet with the magnetizing angle of 90 degrees, and then placing the NdFeB magnet with the magnetizing angle of-67 degrees at the opposite side position in an array mode; and after the NdFeB magnet with the magnetization angle of 67 degrees is installed, loosening the adjusting nut in the middle of the adjusting mold, then taking out the adjusting mold, and taking out the NdFeB magnet with the magnetization angle of 67 degrees at the other end of the array. And sequentially installing NdFeB magnets with the magnetization angles of 22 degrees, -22 degrees and two 0 degrees according to the regular sequence of decreasing angles.
A magnetic field with certain intensity is generated in the cylindrical air gap 3, and the design method has the effect of enhancing the magnetic field intensity in the 0-degree direction.
The cylindrical array magnet for the magnetic refrigerator provided by the invention obtains good tightness by selecting NdFeB magnets with magnet working points Ji being more than or equal to 0.9Br and demagnetization curve squareness being close to 1 and wrapping the NdFeB magnets with the metal shell 1 according to a mounting mode of a certain angle sequence, and obtains a reinforced cylindrical array magnetic field in a 0-degree direction.
The terminology used herein is for the purpose of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. The utility model provides a room temperature magnetic refrigerator is with cylinder type array magnet which characterized in that includes: a magnetic block and a metal shell; the shape of the metal shell is a shape closed structure, even number of magnetic blocks are arranged on the inner wall of the metal shell to form a magnetic field array, and the middle part of the magnetic field array is a cylindrical air gap; end covers are arranged at two ends of the metal shell and pressed on the end faces of the magnetic blocks, and the magnetic field array forms a closed magnetic field in the cylindrical air gap.
2. The cylindrical array magnet for a room temperature magnetic refrigerator as claimed in claim 1, wherein the metal case has a cylindrical shape, the number of the magnetic blocks located at the same layer is even, and the magnetic field array is composed of 3-5 layers of magnetic blocks.
3. The cylindrical array magnet for a room temperature magnetic refrigerator of claim 1, wherein the magnet is in the shape of an arc-shaped cylinder, the inner side and the outer side are arc-shaped surfaces, and the end is a rectangular surface.
4. The cylindrical array magnet for a room temperature magnetic refrigerator as claimed in claim 2, wherein the magnetic blocks are NdFeB magnetic blocks, and the NdFeB magnetic blocks on the same layer in the magnetic field array have different magnetization angles.
5. The cylinder array magnet for a room temperature magnetic refrigerator of claim 4, wherein the NdFeB magnet blocks include 4 magnetization angles of 0 °, 22 °, 67 ° and 90 °, respectively.
6. The cylinder array type magnet for room temperature magnetic refrigerator of claim 4, wherein two opposite magnets on the same plane of the magnetic field array are in mirror symmetry in space.
7. The method for assembling a cylindrical array type magnet for a room temperature magnetic refrigerator according to any one of claims 1 to 6, comprising:
the first pair of magnetic blocks are arranged in a metal shell, the outer cambered surfaces of the two magnetic blocks are tightly attached to the inner side wall of the metal shell, and the two opposite magnets are in mirror symmetry in space;
and taking out one magnetic block, and sequentially installing the rest magnetic blocks into the metal shell according to the descending or ascending sequence of the magnetization angle.
8. The method for assembling a cylindrical array magnet for a room temperature magnetic refrigerator as claimed in claim 7, wherein the NdFeB magnet block includes 4 magnetization angles of 0 °, 22 °, 67 ° and 90 °, respectively, and the steps include:
the outer arc surfaces of the magnetic blocks with the 90-degree magnetization angle are tightly attached to the inner side wall of the metal shell, and then the NdFeB magnets with the-90-degree magnetization angle are placed at opposite positions in an array mode;
after the magnetic block with the 90-degree magnetization angle is installed, loosening an adjusting nut in the middle of the adjusting mold, taking out the adjusting mold, and taking out the magnetic block with the-90-degree magnetization angle on the opposite side; and sequentially installing the rest magnetic blocks into the metal shell according to the descending or ascending sequence of the magnetization angle.
9. The method for assembling a cylindrical array magnet for a room temperature magnetic refrigerator according to claim 8, wherein the NdFeB magnet is assembled according to Halbach rotation theory in the following order: a magnetic block with a 90-degree magnetization angle, a magnetic block with a 67-degree magnetization angle, a magnetic block with a 22-degree magnetization angle, two magnetic blocks with a 0-degree magnetization angle, a magnetic block with a-22-degree magnetization angle, a magnetic block with a-67-degree magnetization angle, and a magnetic block with a-90-degree magnetization angle.
10. The method for assembling a cylindrical array-type magnet for a room temperature magnetic refrigerator according to claim 7, wherein the adjusting mold is provided at both ends thereof with a support plate and a stud bolt, the stud bolt is provided with an adjusting nut, and both ends of the stud bolt are connected with the support plate; the adjusting mold is placed in the metal shell, the two magnetic blocks are placed on two sides of the adjusting mold, and the magnetic blocks are pressed on the inner wall of the metal shell through the supporting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011636874.8A CN112594963A (en) | 2020-12-31 | 2020-12-31 | Cylindrical array type magnet for room temperature magnetic refrigerator and assembling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011636874.8A CN112594963A (en) | 2020-12-31 | 2020-12-31 | Cylindrical array type magnet for room temperature magnetic refrigerator and assembling method thereof |
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| CN112594963A true CN112594963A (en) | 2021-04-02 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4999600A (en) * | 1986-10-17 | 1991-03-12 | Centre National De La Recherche Scientifique | Cylindrical permanent magnet to produce a transversal and uniform induction field |
| CN101012985A (en) * | 2006-12-21 | 2007-08-08 | 中国科学院电工研究所 | Permanent magnet system for rotary magnetic refrigeration apparatus |
| CN110645244A (en) * | 2019-09-09 | 2020-01-03 | 包头稀土研究院 | Assembly device and assembly method of cascade magnetic field system |
| CN210376657U (en) * | 2019-07-18 | 2020-04-21 | 宁波尼兰德磁业股份有限公司 | Halbach assembly |
| CN214199267U (en) * | 2020-12-31 | 2021-09-14 | 包头稀土研究院 | Cylinder array type magnet for room temperature magnetic refrigerator |
-
2020
- 2020-12-31 CN CN202011636874.8A patent/CN112594963A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4999600A (en) * | 1986-10-17 | 1991-03-12 | Centre National De La Recherche Scientifique | Cylindrical permanent magnet to produce a transversal and uniform induction field |
| CN101012985A (en) * | 2006-12-21 | 2007-08-08 | 中国科学院电工研究所 | Permanent magnet system for rotary magnetic refrigeration apparatus |
| CN210376657U (en) * | 2019-07-18 | 2020-04-21 | 宁波尼兰德磁业股份有限公司 | Halbach assembly |
| CN110645244A (en) * | 2019-09-09 | 2020-01-03 | 包头稀土研究院 | Assembly device and assembly method of cascade magnetic field system |
| CN214199267U (en) * | 2020-12-31 | 2021-09-14 | 包头稀土研究院 | Cylinder array type magnet for room temperature magnetic refrigerator |
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