JPS61217657A - Cryogenic liquefying refrigerator - Google Patents
Cryogenic liquefying refrigeratorInfo
- Publication number
- JPS61217657A JPS61217657A JP5582585A JP5582585A JPS61217657A JP S61217657 A JPS61217657 A JP S61217657A JP 5582585 A JP5582585 A JP 5582585A JP 5582585 A JP5582585 A JP 5582585A JP S61217657 A JPS61217657 A JP S61217657A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- refrigerant gas
- low
- pressure
- storage tank
- 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.)
- Pending
Links
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】
〔発明の利用分野〕
木光明は極低温液化冷凍機に係り、特に小型の液化冷凍
ｔａに好適な極低温液化冷凍Ｉｌｃ関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] Kikomei relates to cryogenic liquefaction refrigerators, and particularly to cryogenic liquefaction refrigerators Ilc suitable for small-sized liquefaction refrigerators TA.
従来の装置は冷媒ガスを液化する機能のみで。 Conventional equipment only has the function of liquefying refrigerant gas.
液化された冷媒ガスは気液分離器で分離さｎ、液化冷媒
ガスはトランスファチューブで別に設置さｎたデユワ−
に移送さｊ、て貯蔵さｒＬ、必要に応じてさらにトラン
スファチューブで被冷却体（例えば超電導マグネット、
クライオパネル等）入び被冷却体を収納したクライオス
タット等に移送されていた。The liquefied refrigerant gas is separated in a gas-liquid separator, and the liquefied refrigerant gas is separated in a separate dewar using a transfer tube.
If necessary, transfer tubes are used to transfer objects to be cooled (e.g. superconducting magnets,
It was transferred to a cryostat, etc., which housed the object to be cooled (cryopanel, etc.).
しかしながら、この従来方式の極低温液化冷凍機の場會
、極低温液化冷凍機とは別にデユワ−を設置しなければ
ならないという不経済な問題があった。However, this conventional cryogenic liquefaction refrigerator has an uneconomical problem in that a dewar must be installed separately from the cryogenic liquefaction refrigerator.
特に液体ヘリウムのデユワ−は外からの熱侵入による蒸
発損失を極力低減させるために通常スーパーインシュレ
ーションと呼ばれる真空多層断熱を施すなどしており、
高価につくばかりでなく、ふく射熱侵入を低減する目的
で液体窒素で冷却さｒたシールドを有することが多く、
この場合ｔこけ定期的な液体窒素の補給が必要になるな
ど、取扱いが煩１１ｋになるなどの問題もあった。In particular, liquid helium dewars are usually equipped with vacuum multilayer insulation called super insulation in order to minimize evaporation loss due to heat intrusion from the outside.
Not only are they expensive, but they often have a shield cooled with liquid nitrogen to reduce radiation heat intrusion.
In this case, there were problems such as the need for periodic replenishment of liquid nitrogen, which made handling cumbersome.
なお、この種の装置として関連するものｔこは例えば、
特公昭５８−２１１８６号公報および特開昭５９−１０
９７５１号公報等が挙げられる。In addition, related devices of this type include, for example,
Japanese Patent Publication No. 58-21186 and Japanese Patent Publication No. 59-10
Publication No. 9751 and the like can be mentioned.
本発明の目的は、デユワ−を真空保冷槽内に収納して、
真空保冷槽外部に設ける補語ななくしコンパクトで経済
的な極低温液化冷凍機を提供することにある。The object of the present invention is to store the dewar in a vacuum cold storage tank,
An object of the present invention is to provide a compact and economical cryogenic liquefaction refrigerator that does not require a complement provided outside a vacuum cold storage tank.
本発明は、常温、低圧の冷媒ガスを高圧の冷媒ガスにす
る圧縮機と、高圧の冷媒ガスを膨張させて寒冷を発生さ
せる膨張機と、Ｗｉ記正圧縮機ら吐出される側の高圧の
冷媒ガスと前記圧縮機へ戻る側の低圧の冷媒ガスとを熱
交換させる熱交換器と、低温、高圧の冷媒ガスを膨張さ
せてジュールトムソン効果によって液化させる膨張弁と
、餌記膨張機、熱交換器および膨張弁のそれら低温部分
な収納する真空保冷槽と、前記真空保冷槽内に設けられ
！ｌ′ｉ前記液化した冷媒ガスを貯蔵するデユワ−と、
ｌ！ｆｆ記真空保冷槽内の周囲を囲む熱交換器およびシ
ールド板とかあ構成したことを特徴とし、デュクーを真
空保冷槽内？こ収納して、真空保冷槽外部に設ける補語
ななくしコンパクトで経済的にしたものである。The present invention includes a compressor that converts refrigerant gas at room temperature and low pressure into high-pressure refrigerant gas, an expander that expands the high-pressure refrigerant gas to generate cold air, and a high-pressure compressor on the side discharged from the normal compressor. a heat exchanger that exchanges heat between the refrigerant gas and the low-pressure refrigerant gas returning to the compressor; an expansion valve that expands the low-temperature, high-pressure refrigerant gas and liquefies it by the Joule-Thomson effect; A vacuum cold storage tank for storing the low temperature parts of the exchanger and the expansion valve, and a vacuum cold storage tank provided within the vacuum cold storage tank! a dewar for storing the liquefied refrigerant gas;
l! It is characterized by a heat exchanger and a shield plate surrounding the inside of the vacuum cold storage tank. By storing this, there is no supplement provided outside the vacuum cold storage tank, making it compact and economical.
本発明の一実施例を第１図と第２図とにより説明する。 An embodiment of the present invention will be described with reference to FIGS. 1 and 2.
ｌは高圧のヘリウムガスを生成する圧縮機、２は高圧配
管１９と低圧シェル２０とから成り、真空保冷槽１７の
内周囲を囲む第１熱又換器、３は第２熱交換器、４は第
３熱交換器、５は＄４熱交換器、６は第５熱交換器、７
は第１膨張機、８は第２膨張機、９は高圧ライン、１０
は第１膨張機７で膨張した後の中圧ヘリウムガスが流れ
る中圧ライン、１１は膨張弁、１２は膨張弁１１を通過
して低圧になったヘリウムガスが流ｎ、る低圧ライン。1 is a compressor that generates high-pressure helium gas; 2 is a first heat exchanger that is composed of a high-pressure pipe 19 and a low-pressure shell 20 and surrounds the inner periphery of the vacuum cold storage tank 17; 3 is a second heat exchanger; 4 is the third heat exchanger, 5 is the $4 heat exchanger, 6 is the fifth heat exchanger, 7
is the first expander, 8 is the second expander, 9 is the high pressure line, 10
11 is an expansion valve, and 12 is a low-pressure line through which low-pressure helium gas flows after passing through the expansion valve 11.
１３は液体ヘリウムを貯蔵するテ゛ユワー、１４はデユ
ワ−１３から液体ヘリウムを出入れでする導管、１５．
１６は第１熱交換器２によって冷却さｎｌ、より低温に
なる機器へのふく射熱をシールドするシールド板、１８
は真空排気弁、１９は配管１９ａとフィン１９ｂとから
成る＠１熱交換ａ２の高圧配管、２１は第１熱交換器２
から出た高圧配管である。13 is a tower for storing liquid helium; 14 is a conduit for taking liquid helium in and out from the tower 13; 15.
16 is a shield plate 18 that is cooled by the first heat exchanger 2 and shields radiated heat to equipment that becomes lower temperature;
19 is a vacuum exhaust valve, 19 is a high pressure pipe of @1 heat exchange a2 consisting of a pipe 19a and a fin 19b, and 21 is a first heat exchanger 2.
This is the high pressure piping that came out of the.
次に作用について説明すると、圧縮機１から吐出さｎた
高圧、常温のヘリウムガスは第１熱交換器２の高圧配管
１９に入り、ここで対向して第１熱交換器２の低圧シェ
ル２０を流れる低圧ヘリウムガスによって冷却された後
、一部は第１膨張機７ｃ送らｎ５、残りは第２熱交換器
３の高圧ライン９に入る。第１膨張機７１Ｃ送ちれた高
圧ヘリウムガスは膨張して中圧、低温のヘリウムガスと
なり、第３熱交換器４．中圧ライン】０を通って第２膨
張機８ｃ入る。一方、高圧ライン９に入った残りのヘリ
ウムガスは第２熱交換器３〜第５熱交換器６を通過する
過程でさらに冷却さｒｌ、最終的ｔこは１０に以下の高
圧、低温ヘリウムガスとなって膨張弁１１に入る。膨張
弁１１を通る際に高圧ヘリウムガスは断熱膨張し、ジュ
ールトムソン効果によって低ｍＫ−なり、一部は液化す
る。液化した後の液内ヘリウムはデユワ−Ｊ３の中にた
まり、残りの低圧、低温ヘリウムガスは第５熱交換器６
の低圧ライン１２に戻る。その後、第４熱交換器５〜！
ｇ１熱交換器２の低圧ライン１２を通って対向して流ｒ
、る高圧ヘリウムガスを冷却しつつ、自身の温度を上昇
させ、低圧、常温のヘリウムガスとなって圧縮機】に戻
る。Next, to explain the operation, the high-pressure, room-temperature helium gas discharged from the compressor 1 enters the high-pressure pipe 19 of the first heat exchanger 2, where it is opposed to the low-pressure shell 20 of the first heat exchanger 2. After being cooled by the low-pressure helium gas flowing through, a portion is sent to the first expander 7c n5, and the rest enters the high-pressure line 9 of the second heat exchanger 3. The high-pressure helium gas sent to the first expander 71C is expanded to become medium-pressure, low-temperature helium gas, and is then transferred to the third heat exchanger 4. Medium pressure line] 0 and enters the second expander 8c. On the other hand, the remaining helium gas that has entered the high pressure line 9 is further cooled in the process of passing through the second heat exchanger 3 to the fifth heat exchanger 6, and the final temperature is reduced to 10 or less, which is the high pressure, low temperature helium gas. and enters the expansion valve 11. When passing through the expansion valve 11, the high-pressure helium gas expands adiabatically, becomes low mK- due to the Joule-Thomson effect, and a portion of it liquefies. The liquefied helium is stored in the dewar J3, and the remaining low-pressure, low-temperature helium gas is transferred to the fifth heat exchanger 6.
to the low pressure line 12. After that, the fourth heat exchanger 5~!
g1 Opposed flow r through the low pressure line 12 of the heat exchanger 2
While cooling the high-pressure helium gas, it raises its own temperature and returns to the compressor as low-pressure, room-temperature helium gas.
第２ｍ３４Ａ機８？こ送らｎた中圧、低温のヘリウムガ
スは膨張して低圧、低温のヘリウムガスとなり第４熱又
換器５と第５熱交換器６の間の低圧ライン１２Ｃ含流す
る。2nd m34A aircraft 8? The medium-pressure, low-temperature helium gas thus sent expands to become low-pressure, low-temperature helium gas, which flows into the low-pressure line 12C between the fourth heat exchanger 5 and the fifth heat exchanger 6.
シールド板１５．１６は第１熱交換器２の低圧シェル２
０に接続さｎ、７０〜】ＯＯＫ餌後に冷却されてより低
温部分へのふく射熱侵入を低減する。４９１４はデユワ
−１３の中の液体ヘリウムを取出して被冷却体を収納し
たタライオスタット（図示せず）Ｖこ移送するのに使用
さ几、ここにトランスファチューブを挿入す１ばよい。The shield plates 15 and 16 are the low pressure shell 2 of the first heat exchanger 2.
Connected to 0 n, 70 ~ ]OOK Cooled after feeding to reduce radiation heat intrusion into lower temperature areas. 4914 is used to take out the liquid helium in the dewar 13 and transfer it to the taliostat (not shown) that houses the object to be cooled, and a transfer tube can be inserted here.
また真空保冷槽１７の中は第１熱交換＠２反びシールド
板１５．１６への熱侵入を極力低減するために真空排気
弁１８を介して真空どンプ（図示せず）で排気されてい
る。In addition, the inside of the vacuum cold storage tank 17 is evacuated by a vacuum pump (not shown) via a vacuum exhaust valve 18 in order to reduce the heat intrusion into the first heat exchanger @2 warp shield plate 15 and 16 as much as possible. There is.
第１熱交換器２及びシールド板１５．１６の外側を多層
断熱材で被覆すればより一層、熱侵入を低減できる。Heat infiltration can be further reduced by covering the outside of the first heat exchanger 2 and the shield plates 15, 16 with a multilayer heat insulating material.
本実施例−こよれば、液体ヘリウムを貯蔵するデユワ−
】３が真空保冷槽１７の中に設けられているので、液化
機と別にデユワ−を設ける必要がなく全体のシステムが
簡単になり、またデユワ−１３が低温の第１熱交換器２
及びシールド板１５゜１６で囲まれているので液体窒素
で冷却する必要もなくなるという効果がある。This embodiment - according to this example, a dewar for storing liquid helium.
3 is provided in the vacuum cold storage tank 17, there is no need to provide a separate dewar from the liquefaction machine, simplifying the entire system.
Since it is surrounded by shield plates 15 and 16, there is no need for cooling with liquid nitrogen.
本実施例の変形例としてシールド板１５と第１熱交換器
２を出た高圧配管２１を熱的に接触させることによって
シールド板１５をさらに均一に冷却する方法がある。そ
の場費、シールド板１５がより確実に冷却されるのでデ
ユワ−１３への熱４１入量をさらに低減でと、したがっ
て液体ヘリウムの蒸発量を減少させることができるとい
う効果がある。As a modification of this embodiment, there is a method in which the shield plate 15 is brought into thermal contact with the high pressure pipe 21 exiting the first heat exchanger 2, thereby cooling the shield plate 15 more uniformly. Since the shield plate 15 is cooled more reliably, the amount of heat 41 input to the dewar 13 can be further reduced, and therefore the amount of evaporation of liquid helium can be reduced.
未発明の他の実施例を第３図により説明する。Another embodiment which has not yet been invented will be explained with reference to FIG.
同図ｔこおいて、面記−実施例と同一符号は同一部材を
示す。２２は液体窒素槽、２３は冷却コイル。In the same figure, the same reference numerals as in the surface-illustrated embodiments indicate the same members. 22 is a liquid nitrogen tank, and 23 is a cooling coil.
２４は液体窒素を供給するための導入管である。24 is an introduction pipe for supplying liquid nitrogen.
この実施例では液化機の運転開始前に液体窒素槽２２＃
こ液体窒素を供給することによって第１熱交換器２、皮
び冷却コイル２３を予冷することができ、クールダウン
時間を短縮できるという効果がある。また運転中におい
ては、ヘリウムガスが冷えているので、液体窒素槽２２
内に液体窒素を充満させておいても気化せず、従来のよ
うに運転中にも補充しなければならないという必要がな
い。In this embodiment, the liquid nitrogen tank 22# is
By supplying this liquid nitrogen, the first heat exchanger 2 and the skin cooling coil 23 can be pre-cooled, which has the effect of shortening the cool-down time. Also, during operation, since the helium gas is cold, the liquid nitrogen tank 22
Even if the inside is filled with liquid nitrogen, it will not vaporize, and there is no need to replenish it during operation as in the conventional case.
定期保守等においては、液化機の運転を停止しており、
その間でも液体窒素槽２２Ｃ液体窒素を供給しておけば
、デユワ−１３への熱侵入はさほど増大しないので、液
体ヘリウムの蒸発を押えることができるという効果があ
る。またこれにより、次の運転の時のクールダウン時間
を大幅に短縮できるといへ効果がある。During periodic maintenance, etc., the operation of the liquefier is stopped.
If liquid nitrogen is supplied to the liquid nitrogen tank 22C during this time, the heat intrusion into the dewar 13 will not increase so much, so there is an effect that evaporation of liquid helium can be suppressed. This also has the effect of greatly shortening the cool-down time for the next drive.
〔発明の効果〕。〔Effect of the invention〕.
本発明によｒ、ば、デユワ−を真空保冷槽内に収納して
、真空保冷槽外部に設ける補語をなくすことができ、コ
ンパクトで経済的な極低温液化冷凍機を得ることができ
るという効果がある。According to the present invention, the r, b, dewar can be housed in the vacuum cold storage tank, and the complement provided outside the vacuum cold storage tank can be eliminated, and a compact and economical cryogenic liquefaction refrigerator can be obtained. There is.
第１図は本発明の一実施例である極低温液化冷凍機を示
す断面図、第２図は第１図のＡ部詳細図第３図は本発明
の他の実施例である極低温液化冷凍機を示す断面図であ
る。
１・・・・・・圧縮機、２〜６・・・・・・熱交換器、
７．８・・・・・・膨張機、１１・・・・・・膨張弁、
１３・・・・・・デユワ−１１５，１６・・・・・・シ
ールド板、】７・・・・・・真空保冷槽。
オ１口Fig. 1 is a sectional view showing a cryogenic liquefaction refrigerator which is an embodiment of the present invention, Fig. 2 is a detailed view of part A in Fig. 1, and Fig. 3 is a cryogenic liquefaction refrigerator which is another embodiment of the present invention. It is a sectional view showing a refrigerator. 1...Compressor, 2-6...Heat exchanger,
7.8...Expansion machine, 11...Expansion valve,
13... Dewar-115, 16... Shield plate, ]7... Vacuum cold storage tank. 1 mouthful
Claims (1)
機と、高圧の冷媒ガスを膨張させて寒冷を発生させる膨
張機と、前記圧縮機から吐出される側の高圧の冷媒ガス
と前記圧縮機へ戻る側の低圧の冷媒ガスとを熱交換させ
る熱交換器と、低温、高圧の冷媒ガスを膨張させてジュ
ールトムソン効果によつて液化させる膨張弁と、前記膨
張機、熱交換器および膨張弁のそれら低温部分を収納す
る真空保冷槽と、前記真空保冷槽内に設けられ前記液化
した冷媒ガスを貯蔵するデユワーと、前記真空保冷槽内
の周囲を囲む熱交換器およびシールド板とから構成した
ことを特徴とする極低温液化冷凍機。1. A compressor that converts refrigerant gas at room temperature and low pressure into high-pressure refrigerant gas; an expander that expands the high-pressure refrigerant gas to generate cold; a high-pressure refrigerant gas discharged from the compressor; a heat exchanger that exchanges heat with a low-pressure refrigerant gas returning to the compressor; an expansion valve that expands the low-temperature, high-pressure refrigerant gas and liquefies it by the Joule-Thomson effect; the expander, the heat exchanger, and A vacuum cold storage tank that stores the low-temperature parts of the expansion valve, a dewar that is provided in the vacuum cold storage tank and stores the liquefied refrigerant gas, and a heat exchanger and a shield plate that surround the inside of the vacuum cold storage tank. A cryogenic liquefaction refrigerator characterized by the following configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5582585A JPS61217657A (en) | 1985-03-22 | 1985-03-22 | Cryogenic liquefying refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5582585A JPS61217657A (en) | 1985-03-22 | 1985-03-22 | Cryogenic liquefying refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61217657A true JPS61217657A (en) | 1986-09-27 |
Family
ID=13009735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5582585A Pending JPS61217657A (en) | 1985-03-22 | 1985-03-22 | Cryogenic liquefying refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61217657A (en) |
-
1985
- 1985-03-22 JP JP5582585A patent/JPS61217657A/en active Pending
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