JPH09113048A - Cryotemperature apparatus - Google Patents
Cryotemperature apparatusInfo
- Publication number
- JPH09113048A JPH09113048A JP27130695A JP27130695A JPH09113048A JP H09113048 A JPH09113048 A JP H09113048A JP 27130695 A JP27130695 A JP 27130695A JP 27130695 A JP27130695 A JP 27130695A JP H09113048 A JPH09113048 A JP H09113048A
- Authority
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- Prior art keywords
- cooled
- refrigerator
- heat
- superconducting coil
- shield plate
- 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.)
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- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば超電導磁石
装置における超電導コイルの冷却手段等に適用される極
低温装置に係り、特に超電導コイル等の被冷却物を冷凍
機を用いて冷却するタイプの極低温装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cryogenic device applied to, for example, a cooling means for a superconducting coil in a superconducting magnet device, and more particularly to a type of cooling an object to be cooled such as a superconducting coil using a refrigerator. It relates to a cryogenic device.
【０００２】[0002]
【従来の技術】近年、コイルを超電導転移温度以下の極
低温に冷却することにより電気抵抗が零の超電導コイル
とし、この超電導コイルで永続的な励磁を行うようにし
た超電導磁石装置等が開発されている。また、金属材料
や非金属材料等を極低温まで冷却して、各種観察を行う
試験装置等も開発されている。2. Description of the Related Art In recent years, a superconducting magnet device has been developed in which a coil is cooled to an extremely low temperature below the superconducting transition temperature to form a superconducting coil having zero electric resistance, and the superconducting coil is used for permanent excitation. ing. In addition, a test device and the like for cooling metal materials and non-metal materials to extremely low temperatures and performing various observations have been developed.
【０００３】このような超電導磁石の超電導コイルや各
種材料あるいは容器等の被冷却物を極低温まで冷却する
極低温装置として、液体ヘリウム等の冷媒に被冷却物を
直接浸す構成の極低温装置、あるいは冷凍機を用いて被
冷却物を冷却する極低温装置等が知られている。As a cryogenic device for cooling an object to be cooled such as a superconducting coil of such a superconducting magnet, various materials or a container to an extremely low temperature, a cryogenic device having a structure in which the object to be cooled is directly immersed in a refrigerant such as liquid helium, Alternatively, a cryogenic device for cooling an object to be cooled using a refrigerator is known.
【０００４】これらの極低温装置のうち、前者は高価な
液体ヘリウムを冷媒として使用し、また冷媒の補給作業
が必要である等の難点があるのに対し、後者は停電その
他の人為的な操作停止を行う以外には継続的に被冷却物
を超電導転移温度以下の極低温に保持できる利点がある
ことから、今後の実用化が望まれている。Among these cryogenic devices, the former has drawbacks such as the use of expensive liquid helium as a refrigerant and the need to replenish the refrigerant, whereas the latter has a blackout or other artificial operation. Since there is an advantage that the object to be cooled can be continuously maintained at an extremely low temperature below the superconducting transition temperature other than stopping, it is desired to be put into practical use in the future.
【０００５】図２は、この後者である冷凍機により被冷
却物を冷却するタイプの極低温装置の従来例を示す構成
図である。この極低温装置は、超電導磁石装置の超電導
コイルの中心軸付近に必要磁場を発生させることを目的
として構成されたものである。FIG. 2 is a block diagram showing a conventional example of a cryogenic device of the type in which an object to be cooled is cooled by the latter refrigerator. This cryogenic device is configured for the purpose of generating a required magnetic field near the central axis of the superconducting coil of the superconducting magnet device.
【０００６】すなわち図２に示すように、この極低温装
置は被冷却物である超電導コイル１と、この超電導コイ
ル１を収容する真空容器２と、これら超電導コイル１と
真空容器２との間に配置された熱シールド板３と、超電
導コイル１および熱シールド板３を冷却する少なくとも
１台の冷凍機４とを備えている。超電導コイル１は図示
しない支持具によって真空容器２内に支持されている。That is, as shown in FIG. 2, this cryogenic apparatus has a superconducting coil 1 as an object to be cooled, a vacuum container 2 accommodating the superconducting coil 1, and a space between the superconducting coil 1 and the vacuum container 2. The heat shield plate 3 is arranged, and at least one refrigerator 4 for cooling the superconducting coil 1 and the heat shield plate 3 is provided. The superconducting coil 1 is supported in the vacuum container 2 by a support tool (not shown).
【０００７】そして超電導コイル１は、冷凍機４の低温
側冷凍ステージ５に伝熱板６を介して接しており、これ
により４Ｋ程度に冷却される。また、超電導コイル１と
真空容器２との間は、熱シールド板３の設置または図示
しないスーパーインシュレーションの充填によって、熱
遮蔽および断熱状態となっている。さらに熱シールド板
３は、冷凍機４の高温側冷却ステージ７で必要温度に冷
却されるようになっている。The superconducting coil 1 is in contact with the low temperature side refrigeration stage 5 of the refrigerator 4 via the heat transfer plate 6 and is cooled to about 4K. A space between the superconducting coil 1 and the vacuum container 2 is in a heat shielding and heat insulating state by installing a heat shield plate 3 or filling super insulation (not shown). Furthermore, the heat shield plate 3 is cooled to the required temperature by the high temperature side cooling stage 7 of the refrigerator 4.
【０００８】このような冷凍機４を使用して冷却をおこ
なう極低温装置では、冷凍機４および超電導コイル１の
磁場発生用の励磁電源のスイッチを入れるだけで、必要
な磁場が簡単に得られる。また、停電、その他の人為的
な冷凍機４の運転停止がなければ、運転中は超電導コイ
ル１が常に超電導転移温度以下の極低温状態に保持さ
れ、必要な磁場が超電導コイル１の中心軸上に発生し続
ける。In the cryogenic apparatus for cooling using the refrigerator 4 as described above, the required magnetic field can be easily obtained by simply turning on the excitation power supply for generating the magnetic field of the refrigerator 4 and the superconducting coil 1. . In addition, if there is no power failure or other artificial stoppage of the operation of the refrigerator 4, the superconducting coil 1 is always kept in a cryogenic state below the superconducting transition temperature during operation, and the necessary magnetic field is on the central axis of the superconducting coil 1. Continue to occur.
【０００９】[0009]
【発明が解決しようとする課題】ところが、上述した極
低温装置では冷凍機４の保守，点検等のため、年１回程
度のメンテナンス作業が必要である。メンテナンス作業
を行う場合には、冷凍機４の運転を一時中断し、冷凍機
４の温度を常温まで上げる必要があるが、これに伴って
超電導コイル１等も昇温されることになる。したがっ
て、従来の極低温装置では冷凍機４のメンテナンス作業
の度に、超電導コイル１が超電導転移温度を維持できな
くなるため、極低温装置自体の運転を中断しなければな
らないという不都合があった。However, in the above-mentioned cryogenic device, maintenance work is required about once a year for maintenance and inspection of the refrigerator 4. When performing maintenance work, it is necessary to suspend the operation of the refrigerator 4 and raise the temperature of the refrigerator 4 to room temperature, but the superconducting coil 1 and the like are also heated accordingly. Therefore, in the conventional cryogenic device, the superconducting coil 1 cannot maintain the superconducting transition temperature every time the refrigerating machine 4 is maintained, so that the operation of the cryogenic device itself must be interrupted.
【００１０】また、メンテナンス作業の終了後、極低温
装置の運転を再開する場合には、冷凍機４を起動して昇
温状態の超電導コイル１を再冷却した後、超電導コイル
１の励磁を行わなければならない。このため、メンテナ
ンス作業時間に加えて再冷却等の際に超電導コイル１の
減磁や励磁のための時間も必要となり、極低温装置の運
転中断時間がそれだけ長くなって継続運転用の実用機と
するには、なお問題があった。Further, when the operation of the cryogenic device is restarted after the maintenance work is completed, the refrigerator 4 is started to recool the superconducting coil 1 in the temperature rising state, and then the superconducting coil 1 is excited. There must be. For this reason, in addition to the maintenance work time, a time for demagnetizing and exciting the superconducting coil 1 at the time of recooling, etc. is required, and the operation interruption time of the cryogenic device becomes longer accordingly, and it becomes a practical machine for continuous operation. Still had a problem.
【００１１】本発明はこのような事情に鑑みてなされた
もので、冷凍機の保守、点検等のためのメンテナンス作
業の際に運転を中断する必要がなく、また被冷却物の昇
温を伴わずに冷凍機のみの昇温が行え、長時間運転に対
応できる実用的な極低温装置を提供することを目的とす
る。The present invention has been made in view of such circumstances, and it is not necessary to interrupt the operation at the time of maintenance work such as maintenance and inspection of the refrigerator, and the temperature of the object to be cooled is raised. It is an object of the present invention to provide a practical cryogenic device capable of raising the temperature of only the refrigerator without having to operate it and capable of operating for a long time.
【００１２】[0012]
【課題を解決するための手段】前記の目的を達成するた
めに、請求項１の発明は、被冷却物と、この被冷却物を
収容する真空容器と、これら被冷却物と真空容器との間
に配置された熱シールド板と、前記被冷却物および前記
熱シールド板を冷却する少なくとも１台の冷凍機とを備
えた極低温装置において、前記冷凍機と、前記被冷却物
および前記熱シールド板の少なくともいずれか一方との
間に接続されて、それらの間の伝熱をオン、オフする熱
スイッチを設けたことを特徴とする。In order to achieve the above-mentioned object, the invention of claim 1 comprises an object to be cooled, a vacuum container for containing the object to be cooled, and an object to be cooled and a vacuum container. A cryogenic device comprising a heat shield plate arranged between them, and at least one refrigerator for cooling the object to be cooled and the heat shield plate, wherein the refrigerator, the object to be cooled and the heat shield It is characterized in that a thermal switch is provided which is connected to at least one of the plates to turn heat transfer between them on and off.
【００１３】請求項２の発明は、請求項１記載の極低温
装置において、熱シールド板の内側に、被冷却物に熱的
に接する状態で、熱容量の大きい物質を設けたことを特
徴とする。According to a second aspect of the present invention, in the cryogenic apparatus according to the first aspect, a substance having a large heat capacity is provided inside the heat shield plate while being in thermal contact with the object to be cooled. .
【００１４】請求項３の発明は、請求項２記載の極低温
装置において、熱容量の大きい物質が、ヘリウムガスを
充填した密閉容器であることを特徴とする。According to a third aspect of the present invention, in the cryogenic apparatus according to the second aspect, the substance having a large heat capacity is a closed container filled with helium gas.
【００１５】請求項４の発明は、請求項２記載の極低温
装置において、熱容量の大きい物質が、極低温における
磁気異常比熱を利用した磁性蓄冷材であることを特徴と
する。According to a fourth aspect of the present invention, in the cryogenic apparatus according to the second aspect, the substance having a large heat capacity is a magnetic regenerator material that utilizes magnetic anomalous specific heat at extremely low temperatures.
【００１６】請求項５の発明は、請求項２記載の極低温
装置において、熱容量の大きい物質が、鉛その他の熱容
量の大きい金属であることを特徴とする。According to a fifth aspect of the present invention, in the cryogenic apparatus according to the second aspect, the substance having a large heat capacity is lead or another metal having a large heat capacity.
【００１７】[0017]
【発明の実施の形態】以下、本発明に係る極低温装置の
一実施形態を図１を参照して説明する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a cryogenic device according to the present invention will be described below with reference to FIG.
【００１８】図１は本実施形態による極低温装置の一実
施形態を示す構成図である。FIG. 1 is a block diagram showing an embodiment of the cryogenic device according to the present embodiment.
【００１９】本実施形態の極低温装置は、冷凍機により
被冷却物を冷却するタイプの極低温装置であり、超電導
磁石装置の超電導コイルの中心軸付近に必要磁場を発生
させることを目的として構成されたものである。The cryogenic device of the present embodiment is a cryogenic device of a type in which an object to be cooled is cooled by a refrigerator, and is constructed for the purpose of generating a necessary magnetic field near the central axis of the superconducting coil of the superconducting magnet device. It was done.
【００２０】すなわち図１に示すように、この極低温装
置は被冷却物である超電導コイル１１と、この超電導コ
イル１１を収容する真空容器１２と、これら超電導コイ
ル１１と真空容器１２との間に配置された熱シールド板
１３と、超電導コイル１１および熱シールド板１３を冷
却する少なくとも１台の冷凍機１４とを備えている。超
電導コイル１１は図示しない支持具によって真空容器１
２内に支持されている。That is, as shown in FIG. 1, this cryogenic apparatus has a superconducting coil 11 as an object to be cooled, a vacuum container 12 accommodating the superconducting coil 11, and a space between the superconducting coil 11 and the vacuum container 12. The heat shield plate 13 is arranged, and at least one refrigerator 14 for cooling the superconducting coil 11 and the heat shield plate 13 is provided. The superconducting coil 11 is mounted on the vacuum container 1 by a support (not shown).
It is supported within 2.
【００２１】そして超電導コイル１１は、冷凍機１４の
低温側冷凍ステージ１５に伝熱板１６を介して接してお
り、これにより４Ｋ程度に冷却される。また、超電導コ
イル１１と真空容器１２との間は、熱シールド板１３の
設置または図示しないスーパーインシュレーションの充
填によって、熱遮蔽および断熱状態となっている。さら
に熱シールド板１３は、冷凍機１４の高温側冷却ステー
ジ１７で必要温度に冷却されるようになっている。The superconducting coil 11 is in contact with the low temperature side refrigeration stage 15 of the refrigerator 14 via the heat transfer plate 16 and is cooled to about 4K. A space between the superconducting coil 11 and the vacuum container 12 is in a heat shield and heat insulating state by installing a heat shield plate 13 or filling super insulation (not shown). Further, the heat shield plate 13 is cooled to a required temperature by the high temperature side cooling stage 17 of the refrigerator 14.
【００２２】このような構成において、本実施形態では
冷凍機１４と、超電導コイル１１および熱シールド板１
３の少なくともいずれか一方との間に接続されて、それ
らの間の伝熱をオン、オフする熱スイッチ１８が設けら
れている。この熱スイッチ１８は、熱シールド板１３と
真空容器１２との間、あるいは超電導コイル１１と熱シ
ールド板１３との間に配置されており、その構成は、冷
凍機１４側に接続される熱伝導性の第１の板体と、超電
導コイル１１または熱シールド板１３側に接続される熱
伝導性の第２の板体とを微少間隙を隔てて対向配置し、
第１と第２の板体の間隙に充填した作動媒体とからな
り、作動媒体は熱伝導で伝熱（オン）し、第１、第２板
体の間隙を真空排気することにより、各板体間が輻射に
よる微少な伝熱のみ（オフ）を行う構成のもの、あるい
は、第２板体を第１板体より相対的に下に配置し、冷凍
機１４の温度が超電導コイル１１または熱シールド板１
３の温度より低いときに作動媒体の自然対流で伝熱（オ
ン）し、冷凍機１４の温度が超電導コイル１１または熱
シールド板１３の温度より高いときに伝導のみ（オフ）
を行う構成のものである。With such a configuration, in the present embodiment, the refrigerator 14, the superconducting coil 11 and the heat shield plate 1 are provided.
A thermal switch 18 is provided that is connected to at least one of the three switches 3 to turn heat transfer between them on and off. The heat switch 18 is arranged between the heat shield plate 13 and the vacuum container 12, or between the superconducting coil 11 and the heat shield plate 13, and the structure thereof is such that the heat conduction connected to the refrigerator 14 side is performed. And a heat-conductive second plate connected to the superconducting coil 11 or the heat shield plate 13 side are arranged to face each other with a minute gap,
It is composed of a working medium filled in a gap between the first and second plate bodies, the working medium transfers heat (on) by heat conduction, and the gap between the first and second plate bodies is evacuated to vacuum-extract each plate. A structure in which only a small amount of heat transfer between bodies (radiation) is performed (OFF), or the second plate body is arranged relatively lower than the first plate body, and the temperature of the refrigerator 14 is the superconducting coil 11 or the heat Shield plate 1
When the temperature is lower than 3, the heat is transferred (on) by natural convection of the working medium, and when the temperature of the refrigerator 14 is higher than the temperature of the superconducting coil 11 or the heat shield plate 13, only conduction (off).
Is configured to perform.
【００２３】また、本実施形態では、熱シールド板１３
の内側に、超電導コイル１１に熱的に接する状態で、熱
容量の大きい物質、例えばヘリウムガスを充填した密閉
容器１９が設けられている。Further, in this embodiment, the heat shield plate 13
A closed container 19 filled with a substance having a large heat capacity, for example, helium gas, is provided inside the container while being in thermal contact with the superconducting coil 11.
【００２４】そして、超電導磁石装置の定常運転の際に
は、熱スイッチ１８がオン状態になっており、熱シール
ド板１３は冷凍機１４の高温側冷却ステージ１７の温度
程度に冷凍され、超電導コイル１１は、冷凍機１４の低
温側冷却ステージ１５により伝熱板１６を介して４Ｋ程
度に冷却されている。したがって、超電導コイル１１に
取付けられた密閉容器１９に充填されたヘリウムガス
は、通常、液体ヘリウムの状態となっている。During steady operation of the superconducting magnet device, the heat switch 18 is in the ON state, the heat shield plate 13 is frozen to about the temperature of the high temperature side cooling stage 17 of the refrigerator 14, and the superconducting coil is turned on. 11 is cooled to about 4K by the low temperature side cooling stage 15 of the refrigerator 14 via the heat transfer plate 16. Therefore, the helium gas filled in the closed container 19 attached to the superconducting coil 11 is usually in the state of liquid helium.
【００２５】熱シールド板１３と真空容器１２との間、
あるいは超電導コイル１１と熱シールド板１３との間の
熱スイッチ１８をオフ状態にすると、熱シールド板１３
と真空容器１２との間、および超電導コイル１１と熱シ
ールド板１３との間は、それぞれ熱的に切り離（例えば
真空断熱）され、両者間には、輻射による微少な伝熱の
みとなる。Between the heat shield plate 13 and the vacuum container 12,
Alternatively, when the thermal switch 18 between the superconducting coil 11 and the heat shield plate 13 is turned off, the heat shield plate 13
And the vacuum container 12, and between the superconducting coil 11 and the heat shield plate 13 are thermally separated (for example, vacuum heat insulation), and only a small amount of heat is transferred by radiation.
【００２６】超電導コイル１１に取付けられた密閉容器
１９に充填され、４Ｋ程度に冷却されていた液体ヘリウ
ムは、熱スイッチ１８のオフ状態後の微少な伝熱によっ
て気化し、ヘリウムガスの状態となる。この微少な伝熱
は、超電導コイル１１の常温部（外部）からの浸入熱で
ある。超電導コイル１１は、熱スイッチ１８をオフ状態
にすることにより、冷凍機１４の低温側ステージ１５か
ら熱的に切り離されるため、冷凍機１４による冷却がで
きなくなるが、熱スイッチ１８のオフ状態後の微少な浸
入熱は、超電導コイル１１に取り付けられた密閉容器１
９内の液体ヘリウムがヘリウムガスに気化するために使
われるため、超電導コイル１１は超電導転移温度以下に
保持される。The liquid helium filled in the closed container 19 attached to the superconducting coil 11 and cooled to about 4K is vaporized by the slight heat transfer after the heat switch 18 is turned off, and becomes a helium gas state. . This minute heat transfer is the infiltration heat from the room temperature part (outside) of the superconducting coil 11. Since the superconducting coil 11 is thermally separated from the low temperature side stage 15 of the refrigerator 14 by turning off the thermal switch 18, it cannot be cooled by the refrigerator 14, but after the thermal switch 18 is turned off. A small amount of infiltration heat is attached to the superconducting coil 11 and the closed container 1
Since the liquid helium in 9 is used to vaporize into helium gas, the superconducting coil 11 is kept below the superconducting transition temperature.
【００２７】したがって、本実施形態によれば、超電導
コイル１１を昇温することなく冷凍機１４のみを昇温す
ることができるので、冷凍機１４の保守、点検等のため
のメンテナンス作業の際に、超電導磁石装置の運転を中
断することなく、冷凍機３を昇温してメンテナンス作業
を実施することができる。Therefore, according to the present embodiment, since only the refrigerator 14 can be heated without raising the temperature of the superconducting coil 11, it is possible to perform maintenance work for the maintenance and inspection of the refrigerator 14. It is possible to raise the temperature of the refrigerator 3 and perform maintenance work without interrupting the operation of the superconducting magnet device.
【００２８】なお、以上の実施形態ではヘリウムガスが
充填されている密閉容器１９を、超電導コイル１１に取
付けた構成としたが、この密閉容器１９は超電導コイル
１１の周囲に配管するパイプ状の構成としてもよい。In the above embodiment, the closed container 19 filled with helium gas is attached to the superconducting coil 11. However, the closed container 19 has a pipe-like structure for piping around the superconducting coil 11. May be
【００２９】また、超電導コイル１１に取付ける熱容量
の大きい物質としては、上述のヘリウムガスを充填した
密閉容器１９に限らず、他の熱容量の大きい物質、例え
ばＥｒ3 Ｎｉ，ＥｒＮｉ，Ｅｒ0.9 Ｙｂ0.1 Ｎｉ，Ｅｒ
3 Ｃｏ，Ｎｄ等のように、極低温における磁気異常比熱
を利用した磁性蓄冷材を適用してもよい。このような磁
性蓄冷材あるいは熱容量の大きい金属（例えば鉛）の適
用によっても、上述した密閉容器１９と同様の効果が奏
される。Further, the substance having a large heat capacity attached to the superconducting coil 11 is not limited to the above-mentioned closed container 19 filled with helium gas, but other substances having a large heat capacity such as Er 3 Ni, ErNi, Er 0.9 Yb 0.1 Ni. , Er
A magnetic regenerator material that utilizes anomalous magnetic specific heat at extremely low temperatures, such as 3 Co and Nd, may be applied. Even if such a magnetic regenerator material or a metal having a large heat capacity (for example, lead) is applied, the same effect as that of the closed container 19 described above can be obtained.
【００３０】また、前記実施形態では被冷却物として超
電導コイル１１を適用したが、本発明ではこれに限ら
ず、極低温に冷却する必要のあるもの、例えばコイル以
外の超電導物質、金属材料または非金属材料、これらの
材料を収納する容器等の種々の物を被冷却物として適用
することが可能である。その他、本発明の要旨を逸脱し
ない範囲で種々変形して実施することができる。Further, although the superconducting coil 11 is applied as the object to be cooled in the above-described embodiment, the present invention is not limited to this, and it is necessary to cool to an extremely low temperature, for example, a superconducting substance other than the coil, a metallic material or Various objects such as metallic materials and containers for accommodating these materials can be applied as the objects to be cooled. In addition, various modifications can be made without departing from the scope of the present invention.
【００３１】[0031]
【発明の効果】以上で詳述したように、本発明に係る極
低温装置によれば、冷凍機の保守、点検等のためのメン
テナンス作業の際に運転を中断する必要がなく、また被
冷却物の昇温を伴わずに冷凍機のみの昇温が行え、長時
間運転の必要に対応できるようになり、実用性に優れた
極低温装置が提供できるという効果が奏される。As described above in detail, according to the cryogenic apparatus of the present invention, there is no need to interrupt the operation during maintenance work such as maintenance and inspection of the refrigerator, and it is possible to cool the refrigerator. It is possible to raise the temperature of only the refrigerator without raising the temperature of the object, and it becomes possible to respond to the need for long-term operation, and it is possible to provide an extremely low temperature device having excellent practicability.
【図１】本発明に係る極低温装置のー実施形態を示す構
成図。FIG. 1 is a configuration diagram showing an embodiment of a cryogenic device according to the present invention.
【図２】従来の極低温装置を示す構成図。FIG. 2 is a configuration diagram showing a conventional cryogenic device.
１１ 超電導コイル １２ 真空容器 １３ 熱シールド板 １４ 冷凍機 １５ 低温側冷凍ステージ １６ 伝熱板 １７ 高温側冷却ステージ １８ 熱スイッチ １９ 密閉容器 11 Superconducting Coil 12 Vacuum Container 13 Heat Shield Plate 14 Refrigerator 15 Low Temperature Side Refrigeration Stage 16 Heat Transfer Plate 17 High Temperature Side Cooling Stage 18 Thermal Switch 19 Closed Container
Claims (5)
空容器と、これら被冷却物と真空容器との間に配置され
た熱シールド板と、前記被冷却物および前記熱シールド
板を冷却する少なくとも１台の冷凍機とを備えた極低温
装置において、前記冷凍機と、前記被冷却物および前記
熱シールド板の少なくともいずれか一方との間に接続さ
れて、それらの間の伝熱をオン、オフする熱スイッチを
設けたことを特徴とする極低温装置。1. An object to be cooled, a vacuum container for accommodating the object to be cooled, a heat shield plate arranged between the object to be cooled and the vacuum container, the object to be cooled and the heat shield plate. In a cryogenic device including at least one refrigerator for cooling, the refrigerator is connected between the refrigerator and at least one of the object to be cooled and the heat shield plate, and heat transfer between them. A cryogenic device having a heat switch for turning on and off.
シールド板の内側に、被冷却物に熱的に接する状態で、
熱容量の大きい物質を設けたことを特徴とする極低温装
置。2. The cryogenic apparatus according to claim 1, wherein the inside of the heat shield plate is in thermal contact with an object to be cooled,
A cryogenic device characterized by being provided with a substance having a large heat capacity.
容量の大きい物質が、ヘリウムガスを充填した密閉容器
であることを特徴とする極低温装置。3. The cryogenic apparatus according to claim 2, wherein the substance having a large heat capacity is a closed container filled with helium gas.
容量の大きい物質が、極低温における磁気異常比熱を利
用した磁性蓄冷材であることを特徴とする極低温装置。4. The cryogenic apparatus according to claim 2, wherein the substance having a large heat capacity is a magnetic regenerator material that uses magnetic anomalous specific heat at an extremely low temperature.
容量の大きい物質が、鉛その他の熱容量の大きい金属で
あることを特徴とする極低温装置。5. The cryogenic apparatus according to claim 2, wherein the substance having a large heat capacity is lead or another metal having a large heat capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27130695A JPH09113048A (en) | 1995-10-19 | 1995-10-19 | Cryotemperature apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27130695A JPH09113048A (en) | 1995-10-19 | 1995-10-19 | Cryotemperature apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09113048A true JPH09113048A (en) | 1997-05-02 |
Family
ID=17498217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27130695A Pending JPH09113048A (en) | 1995-10-19 | 1995-10-19 | Cryotemperature apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09113048A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006298701A (en) * | 2005-04-21 | 2006-11-02 | Meidensha Corp | Variable thermal resistance block, heating and cooling device and ozone feeding device |
| JP2009168272A (en) * | 2008-01-11 | 2009-07-30 | Hitachi Ltd | Cryostat |
| DE10297837B4 (en) | 2002-12-16 | 2019-05-09 | Sumitomo Heavy Industries, Ltd. | Method for fixing a refrigerating machine and fastening device therefor |
-
1995
- 1995-10-19 JP JP27130695A patent/JPH09113048A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10297837B4 (en) | 2002-12-16 | 2019-05-09 | Sumitomo Heavy Industries, Ltd. | Method for fixing a refrigerating machine and fastening device therefor |
| JP2006298701A (en) * | 2005-04-21 | 2006-11-02 | Meidensha Corp | Variable thermal resistance block, heating and cooling device and ozone feeding device |
| JP2009168272A (en) * | 2008-01-11 | 2009-07-30 | Hitachi Ltd | Cryostat |
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