JPS58184468A - Magnetic refrigerator - Google Patents
Magnetic refrigeratorInfo
- Publication number
- JPS58184468A JPS58184468A JP6727182A JP6727182A JPS58184468A JP S58184468 A JPS58184468 A JP S58184468A JP 6727182 A JP6727182 A JP 6727182A JP 6727182 A JP6727182 A JP 6727182A JP S58184468 A JPS58184468 A JP S58184468A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- rotating disk
- refrigerator
- disk
- present
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- 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
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Superconductive Dynamoelectric Machines (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は磁性体の断熱消磁によって冷凍を発生する磁気
冷凍機に係り、特に超流動ヘリワムの発生に好適な磁気
冷凍機に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic refrigerator that generates refrigeration by adiabatic demagnetization of a magnetic material, and particularly to a magnetic refrigerator suitable for generating superfluid heliwaum.
従来の磁気冷凍機としては往復動型および回転型のもの
が知られている。往復動型のものは磁性体を高磁界中に
往復動によって出し入れするものであるが、磁性体をモ
ータで駆、動する場合、回転運動を直線運動に変換する
機構を安し、かつストロータが大きくなるため駆ｔｊＩ
ＪＪ（ｆＩ１分が複雑かつ大形になる。また、回転型の
ものは、回転体中に作動流体を流すが、気密性に大きな
問題があ）、流体の循環手段を要してきわめて複雑なも
のになっていた。Reciprocating type and rotary type types are known as conventional magnetic refrigerators. The reciprocating type moves the magnetic material in and out of the high magnetic field by reciprocating motion, but when the magnetic material is driven and moved by a motor, the mechanism that converts rotational motion into linear motion is inexpensive, and the strator is I want to grow bigger
JJ (fI1 minute is complicated and large.Also, in the rotary type, the working fluid flows through the rotating body, but there is a big problem with airtightness), which requires a fluid circulation means and is extremely complicated. It had become a thing.
本発明の目的は、このような問題点を解決するために、
磁性棒金内蔵する円板を回転させることによって冷凍サ
イクルを構成する磁気冷凍機を提供することにある。The purpose of the present invention is to solve such problems,
An object of the present invention is to provide a magnetic refrigerator that constitutes a refrigeration cycle by rotating a disc containing a magnetic bar.
この磁気冷凍機は少なくとも一面が露出した状態で円板
に磁性体を埋めこみ、こｎが静止高磁界部と寒冷取出部
を交互に通過するように回転させ、かつ円板との間に極
めて小さい間隙を保持するように静止板を対向させ、高
温部全４．２ Ｋの液体へり９ムに浸して、低温部で２
に以下の超流動ヘリワムを発生妊せるものである。This magnetic refrigerator has a magnetic material embedded in a disk with at least one side exposed, and is rotated so that it passes alternately through a stationary high magnetic field section and a cold extraction section. The stationary plates were placed opposite each other so as to maintain a gap, and the high temperature part was immersed in 9 μm of liquid at 4.2 K, and the low temperature part was heated for 2
The following superfluid heliwams can be generated.
以下、本開明の実施例を第１図により説明する。An embodiment of the present invention will be described below with reference to FIG.
１ａ及び１ｂは磁性体で例えばＧ ｄ ａ ・Ｇ ａｓ
’ ０ｔｔ（ガドニリワム・ガリウム・カーネット）
単結晶などを円筒状に加工したもので、厚さ２０ｗ位の
円板２に接着剤等で固定さｎている。この日板２として
は、アルミナセラミック、結晶化カラス。1a and 1b are magnetic materials, for example, G da ・Gas
'0tt (Gadoniliwam Gallium Carnet)
It is made by processing a single crystal or the like into a cylindrical shape, and is fixed to a disk 2 with a thickness of about 20W using an adhesive or the like. This date board 2 is made of alumina ceramic and crystallized glass.
繊維強化樹脂など磁性体１ａ、ｌｂと同程度の膨張係数
をもちかつ熱伝導率の低いものが望筐しい。It is desirable to use a material such as fiber-reinforced resin that has an expansion coefficient comparable to that of the magnetic materials 1a and lb and has low thermal conductivity.
第１図では円柱状の磁性体１ａ、ｌｂの両端面が円板２
の表面と同一面上になるよう加工δれている。３ａ及び
３ｂは、円板２に接触しない程度の微小間隙（たとえば
１０μｍ〜２０μｍ）を保って円板２と対向している平
板である。平板３ａ。In Fig. 1, both end surfaces of the cylindrical magnetic bodies 1a and lb are disks 2.
The surface is machined so that it is flush with the surface of the surface. 3a and 3b are flat plates facing the disk 2 with a small gap (for example, 10 μm to 20 μm) that does not contact the disk 2. Flat plate 3a.
３ｂはステンＶス鋼、セラミック、結晶化カラス。3b is stainless steel, ceramic, and crystallized glass.
繊維強化樹脂など熱伝導率の低いものからなる。Made of materials with low thermal conductivity such as fiber-reinforced resin.
間隙は円板２と同一材質のスペーサ４で設定されている
。円板２は軸５に固定され、ベアリング６ａ、６ｂを介
して平板３ａ、３ｂとの位置的関係を保持する。ベアリ
ング６ａ、６ｂとしては、極低温でも動作する無給油型
のものを用いる。７はポールピース、８はコイル（午〈
に超電導コイル）で、ポールピース７のギャップに高磁
界を発生させる。９は寒冷取出部で、断熱配管１０で会
費な部署に連結さ几ている。The gap is set by a spacer 4 made of the same material as the disc 2. Disk 2 is fixed to shaft 5 and maintains a positional relationship with flat plates 3a, 3b via bearings 6a, 6b. The bearings 6a and 6b are oil-free types that operate even at extremely low temperatures. 7 is the pole piece, 8 is the coil (hour
(superconducting coil) to generate a high magnetic field in the gap of the pole piece 7. Reference numeral 9 denotes a cold storage extraction section, which is connected to the membership department through an insulated pipe 10.
第２図は、第１図に示した実施例の上部平面図である。FIG. 2 is a top plan view of the embodiment shown in FIG.
このような構成において、ポールピース７のギャップ部
分には平板３ａ、３ｂに開口１１ａ。In such a configuration, the gap portion of the pole piece 7 has an opening 11a in the flat plates 3a and 3b.
１１ｂがあけてあシ、磁性体ｌｂ中で発生した磁化熱を
周囲の液体ヘリウム１２で冷却する。冷却が完了すると
、円板２は１８０°回転して磁性体ｌａの位置に来ると
消磁さｎて吸熱する。その結果、寒冷取出部９内の液体
ヘリウム１３が冷却きれる。このようなサイクルを繰シ
返して液体ヘリウム１３は２に以下に冷却さｔ″Ｌ超流
動ヘリクムとなる。液体ヘリウム１３と液体ヘリウム１
２０間は上述の如くきわめて小さな間隙に保ｆｃ、ｔ′
しているため、超流動ヘリウムの良好な熱伝導特性が阻
害さｎ、両者が熱的に隔離さｎている。回転の速度は磁
性体が高磁界部または寒冷発生部に滞在する時間を長く
と）、そり間を移動する時間は短くなるように制御する
。11b is opened, and the heat of magnetization generated in the magnetic body lb is cooled down by the surrounding liquid helium 12. When the cooling is completed, the disk 2 rotates 180 degrees and when it comes to the position of the magnetic body la, it is demagnetized and absorbs heat. As a result, the liquid helium 13 in the cold extraction section 9 can be completely cooled. By repeating such a cycle, the liquid helium 13 is cooled down to below 2 t''L and becomes superfluid helium.Liquid helium 13 and liquid helium 1
As mentioned above, the gap between 20 fc and t' is kept extremely small.
This inhibits the good thermal conductivity properties of superfluid helium, and the two are thermally isolated. The speed of rotation is controlled so that the time the magnetic body spends in the high magnetic field area or the cold generation area becomes longer, and the time it moves between the sleds becomes shorter.
第３図は本発明の別の実施例で磁性体を４ケ使用したも
のである。基本的な構成はすべて第１図及び第２図に示
したものと同じで、磁性体の数が２倍になった結果、ポ
ールピース７、コイル８゜寒冷取出部９といずｎｏｗ成
物も２倍に増えている。FIG. 3 shows another embodiment of the present invention in which four magnetic bodies are used. The basic configuration is all the same as shown in Figures 1 and 2, but as a result of doubling the number of magnetic materials, the pole piece 7, the coil 8°, and the cold outlet part 9 are all now available. It has doubled.
この場合、回転が９０° ＠ざみになるので、回転数を
下げることができ、ベアリング等の耐久性を高めること
ができる。同様にして円板の径を大きくすｎば多数の磁
性体を埋め込むことが可り目なので多極化した低速回転
の磁気冷凍機が侍らｎる。In this case, since the rotation is increments of 90°, the number of rotations can be lowered, and the durability of the bearing etc. can be increased. Similarly, if the diameter of the disc is increased, it becomes possible to embed a large number of magnetic substances, so a multipolar, low-speed rotating magnetic refrigerator is used.
第４図は、本発明による磁気冷凍機を超電導マグネット
に適用したシステムを示す。１４が円板を内蔵する冷凍
機の本体、７はコイル８と一体化したポールピース、９
は摩冷取出用配官、１５は駆動用モータで、モータを除
く冷凍機本体は液体ヘリ９ム１２（温度４．２ Ｋ 、
圧力大気圧）に浸漬されている。いっぽう、１６は冷却
すべき超電導マグネットで、配管９内と連通した超流動
ヘリツム１３中に浸漬さｎている。１７は安全弁、１８
は破壊板、１９は電流リードである。２０は成体ヘリワ
ム１２と同一温度レベルのシール）”、２１は液体窒素
温度ノベルのシールド、２２は真空容器で、空間２３は
真空である。このような構成によシ、超電導マグネット
１６及びその周辺での熱負荷は高熱伝導性の超流動へり
９ム１３を経由しと
て冷凍機の本体１４で寒冷金堂へることができる。FIG. 4 shows a system in which the magnetic refrigerator according to the present invention is applied to a superconducting magnet. 14 is the main body of the refrigerator with a built-in disk, 7 is a pole piece integrated with the coil 8, 9
15 is a drive motor, and the refrigerator body excluding the motor is a liquid helicopter 9m 12 (temperature 4.2 K,
pressure (atmospheric pressure). On the other hand, 16 is a superconducting magnet to be cooled, which is immersed in a superfluid helium 13 communicating with the inside of the pipe 9. 17 is a safety valve, 18
is a destruction plate, and 19 is a current lead. 20 is a seal at the same temperature level as the adult Heliwam 12), 21 is a liquid nitrogen temperature shield, 22 is a vacuum container, and space 23 is a vacuum.With this configuration, the superconducting magnet 16 and its surroundings The heat load can be transferred to the cooling chamber via the highly thermally conductive superfluid edge 9m 13 at the main body 14 of the refrigerator.
冷凍発生に要するエネルギー（磁化熱９回転にともなう
摩擦熱等）は液体へリワム１２が沸騰して吸収する。こ
のために要する液体の補給、および気化ガスの回収は別
の冷凍システムで行う。The energy required to generate refrigeration (frictional heat due to nine rotations of magnetization heat, etc.) is absorbed by the liquid by the refrigeration 12 being boiled. Replenishment of the liquid required for this purpose and collection of vaporized gas are performed in a separate refrigeration system.
第５図は本発明の他の実施例を示す断面図で、高温の液
体へリワム１２と超流動性の液体へリワム１３とを仕切
）板２４で隔離したものである。FIG. 5 is a sectional view showing another embodiment of the present invention, in which a high-temperature liquid rewam 12 and a superfluid liquid rewam 13 are separated by a partition plate 24.
磁性体１ａ、ｌ＋は円板２に埋め込１れ、平板２５ａと
２５ｂに囲まれている。円板２はｓ５゜ベアリング６ａ
、６ｂｅ介して平板２５ａ、２５ｂとの位置関係を保っ
ている。８はソレノイド超電導コイルで、磁性体ｌｂ部
に高磁界を発生させる。The magnetic bodies 1a and l+ are embedded in the disk 2 and surrounded by flat plates 25a and 25b. Disc 2 is s5° bearing 6a
, 6be maintains the positional relationship with the flat plates 25a and 25b. 8 is a solenoid superconducting coil that generates a high magnetic field in the magnetic body lb section.
平板２５ａには液体ヘリウム１２側に、また平板２５ｂ
Ｋは超流動ヘリツム１３側に開口がめる。On the flat plate 25a, on the liquid helium 12 side, and on the flat plate 25b.
K has an opening on the superfluid helium 13 side.
この図の場合、磁化による発熱除去面と、消磁中の吸熱
面が第１図に示したような同一面ではないが、第１図に
示したものと全く同じ冷凍サイタルを呈する。In the case of this figure, although the heat generation removal surface due to magnetization and the heat absorption surface during demagnetization are not the same surface as shown in FIG. 1, they exhibit exactly the same refrigeration cycle as shown in FIG.
第６図は磁性体の他の形状を示す。断面が扇形をした磁
性体１が円板２に放射状に４個埋め込まｎている様子を
示す。このような形状は、磁性体単結晶の原材料が円面
状を呈し、こｎより小片に切り出して使用する場合、素
材の無駄が少ない。FIG. 6 shows another shape of the magnetic body. It shows how four magnetic bodies 1 each having a sector-shaped cross section are embedded radially in a disk 2. In such a shape, the raw material of the magnetic single crystal has a circular shape, and when the raw material is cut into smaller pieces for use, there is less waste of the material.
なお、こｆらのシステムを多段に重ねて同一駆動機構で
運転すｎば大きな冷凍出力を得ることができる。Note that a large refrigerating output can be obtained by stacking these systems in multiple stages and operating them with the same drive mechanism.
本発明によｎば、磁性体を回転させるだけで寒冷を発生
することが可Ｈ口であシ、構造が極めて単純化されると
いう大きな効果がある。According to the present invention, it is possible to generate cold simply by rotating the magnetic body, and the structure is extremely simplified, which is a great effect.
第１図は本発明の磁気冷凍機の一実施例を示す断面図、
第２図は第１図の平面要、第３図は本発明の別の実施例
を示す部分斜視図、第４図は本発明の実施例を適用した
例を示す概念断面図、第５図は本発明の別の実施例を示
す断面図、第６図は本発明における円板部分の他の例を
示す平面図である。
１、ｌａ、ｌｂ・・・磁性体、２ ａ、 ２ｂ−・−円
板、３ａ、３ｂ・・・平板、８・・・コイル、９・・・
寒冷取出配管、１２・・・液体ヘリウム、１３・・・超
流動ヘリウム、□ １５・・・駆動モータ。
７５、代理人 弁理士 薄田オσ’
、門”ｉ
、４′、ノ
Ｉ・
笥−１＝５；ミ］
■ ３ 図
第 ４ 反
Ｎｓ 図FIG. 1 is a sectional view showing an embodiment of the magnetic refrigerator of the present invention;
Fig. 2 is a plan view of Fig. 1, Fig. 3 is a partial perspective view showing another embodiment of the present invention, Fig. 4 is a conceptual sectional view showing an example to which the embodiment of the present invention is applied, and Fig. 5 6 is a cross-sectional view showing another embodiment of the present invention, and FIG. 6 is a plan view showing another example of the disc portion in the present invention. 1, la, lb...magnetic material, 2 a, 2b--disk, 3a, 3b...flat plate, 8... coil, 9...
Cold extraction piping, 12...liquid helium, 13...superfluid helium, □ 15...drive motor.
75, Agent Patent Attorney Usuda O σ'
, Gate"i,4',NoI・笥-1=5;Mi] ■ 3 Figure 4 Anti-Ns diagram
Claims (1)
露出するように埋めこまれた回転円板と、前記磁性体が
露出している側に小さな間隙を保って前記回転円板に対
向すると共にこの回転円板を回転自在に支持する静止平
板と、前記回転円板の７ｉｉｉｊ部に高磁界を作用さぜ
るための靜止磁界発生都と、前記静止平板の局部に開口
をもつ寒冷取出部とを有する磁気冷凍機。A rotating disk in which 11 or a plurality of magnetic bodies are embedded so that at least one side thereof is exposed, and a rotating disk facing the rotating disk with a small gap maintained on the side where the magnetic bodies are exposed, and A stationary flat plate that rotatably supports the rotating disk, a static magnetic field generator for applying a high magnetic field to the 7iiij portion of the rotating disk, and a cold extraction section having an opening in a local part of the stationary flat plate. Magnetic refrigerator with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6727182A JPS58184468A (en) | 1982-04-23 | 1982-04-23 | Magnetic refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6727182A JPS58184468A (en) | 1982-04-23 | 1982-04-23 | Magnetic refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58184468A true JPS58184468A (en) | 1983-10-27 |
| JPH0256579B2 JPH0256579B2 (en) | 1990-11-30 |
Family
ID=13340124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6727182A Granted JPS58184468A (en) | 1982-04-23 | 1982-04-23 | Magnetic refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58184468A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007005552A (en) * | 2005-06-23 | 2007-01-11 | Hitachi Ltd | Cryostat for superconducting magnet |
| EP1957890A1 (en) * | 2005-11-10 | 2008-08-20 | Daewoo Electronics Corporation | Magnetic refrigerator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3393526A (en) * | 1966-06-29 | 1968-07-23 | Rca Corp | Cryogenic heat pump including magnetic means for moving a normal zone along a superconductive rod |
| JPS53113355A (en) * | 1977-03-10 | 1978-10-03 | Us Energy | Magnetic refrigerator |
| JPS5610266U (en) * | 1979-07-02 | 1981-01-28 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2706507C3 (en) * | 1977-02-16 | 1981-09-24 | Wilhelmstal Ernst & Sohn GmbH & Co KG, 5600 Radevormwald | Self-adhesive closure for mailers, envelopes, bags, or the like. |
-
1982
- 1982-04-23 JP JP6727182A patent/JPS58184468A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3393526A (en) * | 1966-06-29 | 1968-07-23 | Rca Corp | Cryogenic heat pump including magnetic means for moving a normal zone along a superconductive rod |
| JPS53113355A (en) * | 1977-03-10 | 1978-10-03 | Us Energy | Magnetic refrigerator |
| JPS5610266U (en) * | 1979-07-02 | 1981-01-28 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007005552A (en) * | 2005-06-23 | 2007-01-11 | Hitachi Ltd | Cryostat for superconducting magnet |
| JP4537270B2 (en) * | 2005-06-23 | 2010-09-01 | 株式会社日立製作所 | Cryostat for superconducting magnet |
| EP1957890A1 (en) * | 2005-11-10 | 2008-08-20 | Daewoo Electronics Corporation | Magnetic refrigerator |
| EP1957890A4 (en) * | 2005-11-10 | 2013-05-01 | Daewoo Electronics Corp | Magnetic refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0256579B2 (en) | 1990-11-30 |
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