JPH0523351B2 - - Google Patents

Info

Publication number
JPH0523351B2
JPH0523351B2 JP60285246A JP28524685A JPH0523351B2 JP H0523351 B2 JPH0523351 B2 JP H0523351B2 JP 60285246 A JP60285246 A JP 60285246A JP 28524685 A JP28524685 A JP 28524685A JP H0523351 B2 JPH0523351 B2 JP H0523351B2
Authority
JP
Japan
Prior art keywords
helium
refrigeration
pipe
cold box
main compressor
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.)
Expired - Lifetime
Application number
JP60285246A
Other languages
Japanese (ja)
Other versions
JPS62142983A (en
Inventor
Masaru Tezuka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP60285246A priority Critical patent/JPS62142983A/en
Publication of JPS62142983A publication Critical patent/JPS62142983A/en
Publication of JPH0523351B2 publication Critical patent/JPH0523351B2/ja
Granted legal-status Critical Current

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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
    • F25J1/0062—Light or noble gases, mixtures thereof
    • F25J1/0065—Helium
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0244—Operation; Control and regulation; Instrumentation
    • F25J1/0245—Different modes, i.e. 'runs', of operation; Process control
    • F25J1/0249—Controlling refrigerant inventory, i.e. composition or quantity
    • F25J1/025—Details related to the refrigerant production or treatment, e.g. make-up supply from feed gas itself
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0269—Arrangement of liquefaction units or equipments fulfilling the same process step, e.g. multiple "trains" concept
    • F25J1/0271—Inter-connecting multiple cold equipments within or downstream of the cold box
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0275—Construction and layout of liquefaction equipments, e.g. valves, machines adapted for special use of the liquefaction unit, e.g. portable or transportable devices
    • F25J1/0276—Laboratory or other miniature devices
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
    • F25J2270/912—Liquefaction cycle of a low-boiling (feed) gas in a cryocooler, i.e. in a closed-loop refrigerator
    • 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
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/62—Details of storing a fluid in a tank

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は、例えば、超電導マグネツトやクライ
オポンプ等の冷却に使用されるヘリウム冷凍装置
に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a helium refrigeration system used for cooling superconducting magnets, cryopumps, etc., for example.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

既に提案されているこの種のヘリウム冷凍装置
は、第２図に示されるように、主圧縮機１でヘリ
ウムを圧縮し、これをコールドボツクス装置（ヘ
リウム液化装置）２で液化し、この液化ヘリウム
を長い断熱管（トランスチユーブ）３で被覆した
各枝管４ａ，４ｂ，４ｃ，４ｄを通した各冷凍負
荷体５ａ，５ｂ，５ｃ及び液体ヘリウム槽６へ供
給し、この各冷凍負荷体５ａ，５ｂ，５ｃで熱交
換して冷却し、ここで仕事を了えたヘリウムをヘ
リウム回収精製系７へ移送し、しかる後、ガスヘ
リウムを上記主圧縮機１へ循環供給するように構
成したものである。 As shown in FIG. 2, this type of helium refrigeration system that has already been proposed compresses helium with a main compressor 1, liquefies it in a cold box device (helium liquefaction device) 2, and converts the liquefied helium into is supplied to each refrigeration load body 5a, 5b, 5c and liquid helium tank 6 through each branch pipe 4a, 4b, 4c, 4d covered with a long insulated tube (transtube) 3, and each refrigeration load body 5a, 5b and 5c, the helium is cooled by heat exchange, and the helium that has completed its work is transferred to the helium recovery and purification system 7, after which gas helium is circulated and supplied to the main compressor 1. .

即ち、第２図において、ヘリウム冷凍機にお
ける主圧縮機１のヘリウム供給系７には、コール
ドボツクス装置（ヘリウム液化装置）２を構成す
る第１熱交換器（液体窒素熱交換器）８が接続さ
れており、この第１熱交換器８は、窒素供給管９
からの液体窒素で高圧ガスヘリウムを熱交換して
高圧低温ガス化し、仕事を了えた液体窒素は気化
して還流する。一方、上記第１熱交換器８の下流
側のヘリウム供給系７には、第２熱交換器１０及
びジユールトムソン弁１１が接続されており、こ
のジユールトムソン弁１１の下流側には、液体ヘ
リウム槽６及び各冷凍負荷体５ａ，５ｂ，５ｃが
長い断熱管（トランスフアチユーブ）３を被覆し
た各枝管４ａ，４ｂ，４ｃ，４ｄを通して接続さ
れている。 That is, in FIG. 2, a first heat exchanger (liquid nitrogen heat exchanger) 8 constituting a cold box device (helium liquefaction device) 2 is connected to a helium supply system 7 of a main compressor 1 in a helium refrigerator. This first heat exchanger 8 is connected to a nitrogen supply pipe 9.
The high-pressure gas helium is heat-exchanged with liquid nitrogen from the reactor, turning it into a high-pressure, low-temperature gas, and the liquid nitrogen that has completed its work is vaporized and refluxed. On the other hand, a second heat exchanger 10 and a Joel-Thomson valve 11 are connected to the helium supply system 7 on the downstream side of the first heat exchanger 8, and on the downstream side of the Joel-Thomson valve 11, The liquid helium tank 6 and each refrigeration load body 5a, 5b, 5c are connected through each branch pipe 4a, 4b, 4c, 4d covered with a long heat insulating pipe (transfer tube) 3.

なお、上記液体ヘリウム槽６は、上記各冷凍負
荷体５ａ，５ｂ，５ｃにヘリウム供給管１２を介
して接続されている。さらに、上記第２熱交換器
１０の入口側と出口側との間には、バイパス路１
３ａが接続されており、このバイパス路１３ａに
は、膨脹器１３が付設されている。さらに又、上
記各冷凍負荷体５ａ，５ｂ，５ｃと上記主圧縮機
１とは、戻り管１４で接続されており、この戻り
管１４には、ヘリウム回収精製系２１が設置され
ている。なお、上記各冷凍負荷体５ａ，５ｂ，５
ｃと上記主圧縮機１とは上記第２熱交換器１０を
引通した還流管１５で接続されている。 The liquid helium tank 6 is connected to each of the refrigeration loads 5a, 5b, and 5c via helium supply pipes 12. Further, a bypass path 1 is provided between the inlet side and the outlet side of the second heat exchanger 10.
3a is connected, and an expander 13 is attached to this bypass path 13a. Furthermore, each of the refrigeration loads 5a, 5b, 5c and the main compressor 1 are connected by a return pipe 14, and a helium recovery and purification system 21 is installed in the return pipe 14. In addition, each of the above-mentioned refrigeration load bodies 5a, 5b, 5
c and the main compressor 1 are connected by a reflux pipe 15 passing through the second heat exchanger 10.

従つて、上述したヘリウム冷凍装置は、主圧縮
機１を駆動することにより、ガスヘリウムを圧縮
し、これをコールドボツクス装置２を構成する第
１熱交換器８及び第２熱交換器１０で高圧低温ガ
スヘリウムを生成し、しかる後、これをジユール
トムソン弁１１を通すことにより、ガスヘリウム
を膨脹させて極低温の液体ヘリウムを生成する。
しかして、この一部の液体ヘリウムは、液体ヘリ
ウム槽６へ貯蔵されるけれども、大部分の液体ヘ
リウムは、各冷凍負荷体５ａ，５ｂ，５ｃへ供給
され、ここで、例えば超電導マグネツトと熱交換
して冷却した後、仕事を了えた一部のガスヘリウ
ムは、戻り管１４のヘリウム回収精製系２１を通
して主圧縮機１へ移送し、他方、残りのヘリウム
は還流管１５を通して主圧縮機１へ再び供給する
ようになつている。 Therefore, the helium refrigeration system described above compresses gas helium by driving the main compressor 1, and converts it to high pressure in the first heat exchanger 8 and second heat exchanger 10 that constitute the cold box device 2. A cryogenic gas helium is produced and then passed through a Joel-Thomson valve 11 to expand the gas helium to produce cryogenic liquid helium.
Although some of this liquid helium is stored in the liquid helium tank 6, most of the liquid helium is supplied to each of the refrigeration loads 5a, 5b, and 5c, where it is used for heat exchange with, for example, a superconducting magnet. After cooling, part of the gas helium that has completed its work is transferred to the main compressor 1 through the helium recovery and purification system 21 in the return pipe 14, while the remaining helium is transferred to the main compressor 1 through the reflux pipe 15. It is starting to be supplied again.

なお、上述したヘリウム冷凍装置は、ヘリウム
回収精製系２１を省略して、主圧縮機１にヘリウ
ム精製器を付設したり、液体ヘリウム槽６を省略
するときもある。又、上述したヘリウム冷凍装置
における主圧縮機１及びコールドボツクス装置２
の容量は、各冷凍負荷体５ａ，５ｂ，５ｃの入口
側に設けられたジユールトムソン弁（低温バルブ
１１及び長い断熱管３の熱損失を勘案して決定さ
れるものである。 In the helium refrigeration system described above, the helium recovery and purification system 21 may be omitted, a helium purifier may be attached to the main compressor 1, or the liquid helium tank 6 may be omitted. Moreover, the main compressor 1 and the cold box device 2 in the helium refrigeration system described above
The capacity is determined by taking into consideration the heat loss of the Joel-Thompson valve (low-temperature valve 11 and long insulated pipe 3) provided on the inlet side of each refrigeration load body 5a, 5b, 5c.

しかしながら、上述したヘリウム冷凍装置は、
複数の冷凍負荷体５ａ，５ｂ，５ｃにコールドボ
ツクス装置２をヘリウム供給管７で接続し、これ
を高価なトランスフアチユーブによる断熱管３を
被覆するようになつている関係上、数10m〜数
100m程度の長さにおよび断熱管３を被覆すれば、
ヘリウム供給管７内のヘリウムの熱損失も増大す
るばかりでなく、熱の交換効率が低下すると共
に、上記断熱管３の配管が長くなつて経済的に高
価なものとなる。 However, the helium refrigeration device described above,
Since the cold box device 2 is connected to the plurality of refrigeration loads 5a, 5b, and 5c by the helium supply pipe 7, and the insulated pipe 3 is covered with an expensive transfer tube, the length of the cold box device 2 is several tens of meters to several
If the insulated pipe 3 is covered with a length of about 100m,
Not only does the heat loss of the helium in the helium supply pipe 7 increase, but also the heat exchange efficiency decreases, and the piping of the heat insulating pipe 3 becomes long, making it economically expensive.

〔発明の目的〕[Purpose of the invention]

本発明は、上述した事情に鑑みてなされたもの
であつて、複数に冷凍負荷体に各コールドボツク
ス装置をそれぞれ直接的に接続して液体ヘリウム
の移送距離を短縮し、熱損失を低減して熱の交換
効率の向上を図り、併せて、断熱管の長さを短く
して経済的に配管し得るようにしたことを目的と
するヘリウム冷凍装置を提供するものである。 The present invention has been made in view of the above-mentioned circumstances, and involves connecting each cold box device directly to a plurality of refrigerating loads to shorten the transfer distance of liquid helium and reduce heat loss. The present invention provides a helium refrigeration system that aims to improve the heat exchange efficiency and also shortens the length of the insulated pipes so that the piping can be installed economically.

〔発明の概要〕[Summary of the invention]

本発明は、主圧縮機にヘリウム供給系を接続
し、このヘリウム供給系から分岐した各冷凍ライ
ンに各コールドボツクス装置を接続し、この各コ
ールドボツクス装置と各冷凍負荷体とを断熱管を
被覆した各接続管で接続し、この各冷凍負荷体と
上記主圧縮機とを各連管を介して戻り管で繋ぎ、
この戻り管にヘリウム回収精製系を設けて構成し
たものである。 The present invention connects a helium supply system to the main compressor, connects each cold box device to each refrigeration line branched from this helium supply system, and covers each cold box device and each refrigeration load with an insulated pipe. each refrigeration load body and the main compressor are connected via each connecting pipe with a return pipe,
This return pipe is equipped with a helium recovery and purification system.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明を図示の一実施例について説明す
る。 Hereinafter, the present invention will be described with reference to an illustrated embodiment.

なお、本発明は、上述した具体例と同一構成部
材には同じ符号を付して説明する。 第１図にお
いて、符号１は、ヘリウム冷凍機における主圧
縮機であつて、この主圧縮機１の吐出がわのヘリ
ウム供給系７には、各冷媒ライン７ａ，７ｂ，７
ｃが分岐して設けられており、この各冷媒ライン
７ａ，７ｂ，７ｃには各コールドボツクス装置
（ヘリウム液化装置）１６ａ，１６ｂ，１６ｃが
接続されている。又、この各コールドボツクス装
置１６ａ，１６ｂ，１６ｃと各冷凍負荷体５ａ，
５ｂ，５ｃとは短い断熱管１８を被覆した各接続
管１７ａ，１７ｂ，１７ｃおよび１９ａ，１９
ｂ，１９ｃで接続されており、上記各冷凍負荷体
５ａ，５ｂ，５ｃと上記主圧縮機１とは、各連管
２０ａ，２０ｂ，２０ｃを介して戻り管１４で繋
がれており、この戻り管１４にはヘリウム回収精
製系２１が設置されている。 It should be noted that the present invention will be described with the same reference numerals attached to the same constituent members as in the above-described specific example. In FIG. 1, reference numeral 1 denotes a main compressor in a helium refrigerator, and a helium supply system 7 on the discharge side of the main compressor 1 includes refrigerant lines 7a, 7b, 7.
The refrigerant lines 7a, 7b, 7c are connected to cold box devices (helium liquefaction devices) 16a, 16b, 16c. Moreover, each cold box device 16a, 16b, 16c and each refrigeration load body 5a,
5b, 5c are connecting pipes 17a, 17b, 17c and 19a, 19 that cover the short heat insulating pipe 18.
The refrigeration loads 5a, 5b, 5c and the main compressor 1 are connected by a return pipe 14 via each connecting pipe 20a, 20b, 20c. A helium recovery and purification system 21 is installed in the pipe 14 .

なお、上記各コールドボツクス装置（ヘリウム
液化装置）１６ａ，１６ｂ，１６ｃは、第２図に
示されるように、窒素供給管９からの液体窒素で
高圧ガスヘリウムを熱交換して高圧低温ガス化す
る第１熱交換器８、第２熱交換器１０、膨脹器１
３及び極低温の液体ヘリウムを生成するジユール
トムソン弁１１とで構成されている。 Each of the cold box devices (helium liquefaction devices) 16a, 16b, and 16c exchanges heat with liquid nitrogen from the nitrogen supply pipe 9 to convert high-pressure gas helium into high-pressure low-temperature gas, as shown in FIG. First heat exchanger 8, second heat exchanger 10, expander 1
3 and a Joel-Thomson valve 11 that generates cryogenic liquid helium.

従つて、主圧縮機１を駆動することにより、ガ
スヘリウムを圧縮し、これをヘリウム供給系７及
び各冷媒ライン７ａ，７ｂ，７ｃを通して各コー
ルドボツクス装置１６ａ，１６ｂ，１６ｃで極低
温の液体ヘリウムを生成する。しかして、この液
体ヘリウムを各接続管１７ａ，１７ｂ，１７ｃを
通して各冷凍負荷体５ａ，５ｂ，５ｃへ供給し、
ここで仕事をし、仕事を了えたガスヘリウムは、
各連管２０ａ，２０ｂ，２０ｃ及び戻り管１４の
ヘリウム回収精製系２１を通して主圧縮機１へ移
送される。 Therefore, by driving the main compressor 1, gas helium is compressed, and it is passed through the helium supply system 7 and each refrigerant line 7a, 7b, 7c to each cold box device 16a, 16b, 16c to convert it into cryogenic liquid helium. generate. Then, this liquid helium is supplied to each refrigeration load body 5a, 5b, 5c through each connecting pipe 17a, 17b, 17c,
The gas helium that worked here and finished its work,
The helium is transferred to the main compressor 1 through the helium recovery and purification system 21 of each of the connecting pipes 20a, 20b, 20c and the return pipe 14.

なお、上記各冷凍負荷体５ａ，５ｂ，５ｃの一
部のヘリウムは、各接続管１９ａ，１９ｂ，１９
ｃ及び還流管１５を通して主圧縮機１へ再び供給
するようになつている。 In addition, some helium of each of the above-mentioned refrigeration loads 5a, 5b, 5c is supplied to each connecting pipe 19a, 19b, 19.
The main compressor 1 is supplied again through the reflux pipe 15 and the reflux pipe 15.

このように、上記各コールドボツクス装置１６
ａ，１６ｂ，１６ｃと各冷凍負荷体５ａ，５ｂ，
５ｃとは、短縮した各接続管１７ａ，１７ｂ，１
７ｃ，１９ａ，１９ｂ，１９ｃで接続されている
ので、断熱管１８ａ，１８ｂ，１８ｃは短くな
り、液体ヘリウムの移送距離を短縮することによ
つて熱損失を低減し、熱の交換効率の向上を図つ
ている。 In this way, each of the cold box devices 16
a, 16b, 16c and each refrigeration load body 5a, 5b,
5c means each shortened connecting pipe 17a, 17b, 1
7c, 19a, 19b, and 19c, the heat insulating pipes 18a, 18b, and 18c are shortened, reducing heat loss by shortening the transfer distance of liquid helium, and improving heat exchange efficiency. It is planned.

〔発明の効果〕〔Effect of the invention〕

以上述べたように本発明によれば、主圧縮機１
にヘリウム供給系７を接続し、このヘリウム供給
系７から分岐した各冷媒ライン７ａ，７ｂ，７ｃ
に各コールドボツクス装置１６ａ，１６ｂ，１６
ｃを接続し、この各コールドボツクス装置１６
ａ，１６ｂ，１６ｃと各冷凍負荷体５ａ，５ｂ，
５ｃとを断熱管１８を被覆した各接続管１７ａ，
１７ｂ，１７ｃで接続し、この各冷凍負荷体５
ａ，５ｂ，５ｃと上記主圧縮機１とを各連管２０
ａ，２０ｂ，２０ｃを介して戻り管１４で繋ぎ、
この戻り管１４にヘリウム回収精製系２１を設け
てあるので、液体ヘリウムの移送距離を短縮して
熱損失を低減できるばかりでなく、熱の交換効率
の向上を図ることができるし、さらに、断熱管の
長さを短くして経済的な配管ができる。 As described above, according to the present invention, the main compressor 1
A helium supply system 7 is connected to the helium supply system 7, and each refrigerant line 7a, 7b, 7c branched from this helium supply system 7.
Each cold box device 16a, 16b, 16
c, and each cold box device 16
a, 16b, 16c and each refrigeration load body 5a, 5b,
5c and each connecting pipe 17a covered with the heat insulating pipe 18,
17b and 17c, each refrigerating load body 5
a, 5b, 5c and the main compressor 1 are connected to each connecting pipe 20.
connected by a return pipe 14 via a, 20b, 20c,
Since this return pipe 14 is provided with a helium recovery and purification system 21, it is possible not only to shorten the transfer distance of liquid helium and reduce heat loss, but also to improve heat exchange efficiency. Economical piping can be achieved by shortening the length of the pipe.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本発明のヘリウム冷凍装置の系統
図、第２図は、既に提案されているヘリウム冷凍
装置の系統図である。 １……主圧縮機、５ａ，５ｂ，５ｃ……冷凍負
荷体、７……ヘリウム供給系、７ａ，７ｂ，７ｃ
……冷媒ライン、１４……戻り管、１６ａ，１６
ｂ，１６ｃ……コールドボツクス装置、１７ａ，
１７ｂ，１７ｃ……接続管、１８……断熱管、２
１……ヘリウム回収精製系。 FIG. 1 is a system diagram of a helium refrigeration system according to the present invention, and FIG. 2 is a system diagram of a helium refrigeration system that has already been proposed. 1... Main compressor, 5a, 5b, 5c... Refrigeration load body, 7... Helium supply system, 7a, 7b, 7c
... Refrigerant line, 14 ... Return pipe, 16a, 16
b, 16c...cold box device, 17a,
17b, 17c... Connection pipe, 18... Heat insulation pipe, 2
1... Helium recovery and purification system.

Claims (1)

【特許請求の範囲】 １ 主圧縮機にヘリウム供給系を接続し、このヘ
リウム供給系から分岐した各冷凍ラインに各コー
ルドボツクス装置を接続し、この各コールドボツ
クス装置と各冷凍負荷体とを断熱管を被覆した各
接続管で接続し、この各冷凍負荷体と上記主圧縮
機とを各連管を介して戻り管で繋ぎ、この戻り管
にヘリウム回収精製系を設けたことを特徴とする
ヘリウム冷凍装置。 ２ コールドボツクス装置は、ヘリウム供給系に
第１熱交換器、第２熱交換器及びジユールトムソ
ン弁を接続し、この第２熱交換器の上流側と下流
側とに膨脹器を備えたバイパス路を付設したこと
を特徴とする特許請求の範囲第１項記載のヘリウ
ム冷凍装置。[Claims] 1. A helium supply system is connected to the main compressor, each cold box device is connected to each refrigeration line branched from this helium supply system, and each cold box device and each refrigeration load are insulated. The pipes are connected by covered connecting pipes, each of the refrigeration loads and the main compressor are connected via each connecting pipe with a return pipe, and a helium recovery and purification system is provided in the return pipe. Helium refrigeration equipment. 2. The cold box device is a bypass system in which a first heat exchanger, a second heat exchanger, and a Joel-Thomson valve are connected to a helium supply system, and expanders are provided on the upstream and downstream sides of the second heat exchanger. The helium refrigeration system according to claim 1, further comprising a passage.
JP60285246A 1985-12-18 1985-12-18 Helium refrigerator Granted JPS62142983A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60285246A JPS62142983A (en) 1985-12-18 1985-12-18 Helium refrigerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60285246A JPS62142983A (en) 1985-12-18 1985-12-18 Helium refrigerator

Publications (2)

Publication Number Publication Date
JPS62142983A JPS62142983A (en) 1987-06-26
JPH0523351B2 true JPH0523351B2 (en) 1993-04-02

Family

ID=17689004

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60285246A Granted JPS62142983A (en) 1985-12-18 1985-12-18 Helium refrigerator

Country Status (1)

Country Link
JP (1) JPS62142983A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2375390B1 (en) * 2009-10-26 2013-02-11 Consejo Superior De Investigaciones Científicas (Csic) HELIO RECOVERY PLANT.

Also Published As

Publication number Publication date
JPS62142983A (en) 1987-06-26

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