JP7080066B2 - Cryogenic liquefied gas generator - Google Patents

Cryogenic liquefied gas generator Download PDF

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Publication number
JP7080066B2
JP7080066B2 JP2018023852A JP2018023852A JP7080066B2 JP 7080066 B2 JP7080066 B2 JP 7080066B2 JP 2018023852 A JP2018023852 A JP 2018023852A JP 2018023852 A JP2018023852 A JP 2018023852A JP 7080066 B2 JP7080066 B2 JP 7080066B2
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Prior art keywords
liquefied gas
delivery pipe
storage tank
gas generator
housing
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JP2018023852A
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Japanese (ja)
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JP2019138414A (en
Inventor
康祐 日高
仁 小田
和樹 松藤
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Ulvac Cryogenics Inc
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Ulvac Cryogenics Inc
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Priority to JP2018023852A priority Critical patent/JP7080066B2/en
Priority to CN201910090026.2A priority patent/CN110160317B/en
Publication of JP2019138414A publication Critical patent/JP2019138414A/en
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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
    • 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
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0012—Primary atmospheric gases, e.g. air
    • F25J1/0015—Nitrogen
    • 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
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0012—Primary atmospheric gases, e.g. air
    • 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
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0012—Primary atmospheric gases, e.g. air
    • F25J1/0017—Oxygen
    • 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
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    • 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
    • F25J1/0225—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 using other external refrigeration means not provided before, e.g. heat driven absorption chillers
    • 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
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    • 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
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
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    • 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
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04945—Details of internal structure; insulation and housing of the cold box
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    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
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    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/032—Orientation with substantially vertical main axis
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    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
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    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
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    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0478—Position or presence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/031—Treating the boil-off by discharge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
    • F17C5/04—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases requiring the use of refrigeration, e.g. filling with helium or hydrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • 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
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/60—Processes or apparatus using other separation and/or other processing means using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end
    • F25J2205/64—Processes or apparatus using other separation and/or other processing means using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end by pressure-swing adsorption [PSA] at the hot end
    • 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
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/40—Air or oxygen enriched air, i.e. generally less than 30mol% of O2
    • 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
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/42—Nitrogen or special cases, e.g. multiple or low purity N2
    • 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
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/06—Lifting of liquids by gas lift, e.g. "Mammutpumpe"
    • 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
    • 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

Description

本発明は、液体窒素等の低温液化ガスを製造することが可能な低温液化ガス発生装置に関する。 The present invention relates to a low temperature liquefied gas generator capable of producing a low temperature liquefied gas such as liquid nitrogen.

従来から、理科学機器等の冷熱源としての液体窒素を簡易に製造する液体窒素発生装置が知られている。例えば特許文献１には、上部に開口部を有する断熱容器である貯蔵槽と、貯蔵槽に窒素ガスを導入する空気分離装置と、貯蔵槽の開口部に配置され、貯蔵槽に導入された窒素ガスを液化させるコールドヘッドとを備えた簡易液体窒素製造装置が開示されている。 Conventionally, a liquid nitrogen generator for easily producing liquid nitrogen as a cold heat source for science and science equipment has been known. For example, in Patent Document 1, a storage tank which is a heat insulating container having an opening at the top, an air separation device for introducing nitrogen gas into the storage tank, and nitrogen arranged at the opening of the storage tank and introduced into the storage tank. A simple liquid nitrogen producing apparatus including a cold head for liquefying a gas is disclosed.

特許第２８１６９５９号公報Japanese Patent No. 2816959

従来の液体窒素発生装置は、貯蔵槽と、空気分離装置と、コールドヘッドへ冷媒を循環させる圧縮機ユニット等がそれぞれ別個の装置として床上に設置されるため、装置の設置占有面積が大きいという問題がある。
さらに従来の液体窒素発生装置においては、貯蔵槽内の液体窒素を外部へ取り出すための取出口の位置が固定されているため、供給された液体窒素を受容する容器の種類や大きさに応じて取出口の位置を変更することができない、あるいは、別途用意された接続用ホースを取出口へ接続して液体窒素を取り出す必要があった。 In the conventional liquid nitrogen generator, the storage tank, the air separation device, the compressor unit that circulates the refrigerant to the cold head, etc. are installed on the floor as separate devices, so the problem is that the installation area of the device is large. There is.
Furthermore, in the conventional liquid nitrogen generator, the position of the outlet for taking out the liquid nitrogen in the storage tank to the outside is fixed, so that it depends on the type and size of the container that receives the supplied liquid nitrogen. The position of the outlet could not be changed, or it was necessary to connect a separately prepared connection hose to the outlet to take out liquid nitrogen.

以上のような事情に鑑み、本発明の目的は、装置の設置占有面積を低減することができるとともに、取出口の位置の変更が可能な低温液化ガス発生装置を提供することにある。 In view of the above circumstances, an object of the present invention is to provide a low temperature liquefied gas generator capable of reducing the installation occupied area of the device and changing the position of the outlet.

上記目的を達成するため、本発明の一形態に係る低温液化ガス発生装置は、貯留タンクと、ガス導入器と、冷凍回路と、送出配管と、筐体とを具備する。
前記貯留タンクは、液化ガスを貯留する。
前記ガス導入器は、前記貯留タンクへ液化すべきガスを導入する。
前記冷凍回路は、前記貯留タンクに導入されたガスを冷却して液化する冷凍機を含む。
前記送出配管は、前記貯留タンクに連絡し、液化ガスの流出口を先端部に有する。
前記筐体は、前記液化ガス送出管の先端部を着脱可能に保持可能な操作部を有し、前記貯留タンク、前記冷凍回路、前記ガス導入器及び前記送出配管を収容する。 In order to achieve the above object, the cryogenic gas generator according to one embodiment of the present invention includes a storage tank, a gas introducer, a refrigerating circuit, a delivery pipe, and a housing.
The storage tank stores liquefied gas.
The gas introducer introduces a gas to be liquefied into the storage tank.
The refrigerating circuit includes a refrigerator that cools and liquefies the gas introduced into the storage tank.
The delivery pipe communicates with the storage tank and has an outlet for liquefied gas at the tip.
The housing has an operation unit that can detachably hold the tip of the liquefied gas delivery pipe, and houses the storage tank, the refrigeration circuit, the gas introducer, and the delivery pipe.

上記低温液化ガス発生装置においては、貯留タンク、冷凍回路、ガス導入器及び送出配管がそれぞれ共通の筐体に収容されているため、装置全体のコンパクト化と設置面積の低減を図ることができる。また、筐体の操作部に送出配管の先端部が着脱可能に構成されているため、取出口の位置の変更が可能となる。 In the cryogenic liquefied gas generator, since the storage tank, the refrigerating circuit, the gas introducer, and the delivery pipe are housed in a common housing, the entire device can be made compact and the installation area can be reduced. Further, since the tip of the delivery pipe is detachably configured on the operation portion of the housing, the position of the outlet can be changed.

前記送出配管の先端部は、前記流出口の近傍に固定されたハンドルをさらに含み、前記送出配管は、前記ハンドルを介して前記操作部から前記筐体の外側へ引き出すことが可能に構成されてもよい。
送出配管が引き出し可能に構成されるため、ハンドルを操作して取出口を任意の位置に移動させることができる。 The tip of the delivery pipe further includes a handle fixed in the vicinity of the outlet, and the delivery pipe is configured to be able to be pulled out from the operation unit to the outside of the housing via the handle. May be good.
Since the delivery pipe is configured to be retractable, the outlet can be moved to any position by operating the handle.

前記筐体は、前記操作部を有する正面と、前記正面に対向する背面とを有する縦長の直方体で構成され、前記送出配管は、前記正面と前記背面との間において前記貯留タンクの上部に架け渡されるアーチ領域と、前記貯留タンクよりも前記背面側に位置し重力方向に垂下する垂下領域とを有してもよい。
筐体を縦長の直方体形状にすることで、内部の各ユニットを三次元的に配置して設置占有面積の低減を図ることができるとともに、送出配管が比較的長尺の場合でも筐体内に効率よく収納することができる。 The housing is composed of a vertically long rectangular parallelepiped having a front surface having the operation unit and a back surface facing the front surface, and the delivery pipe is hung on the upper part of the storage tank between the front surface and the back surface. It may have an arch region to be passed and a hanging region located on the back side of the storage tank and hanging in the direction of gravity.
By making the housing into a vertically long rectangular parallelepiped shape, each unit inside can be arranged three-dimensionally to reduce the installation occupied area, and even if the delivery pipe is relatively long, it is efficient inside the housing. Can be stored well.

前記液化ガス発生装置は、前記筐体の内部に設けられた張力発生機構をさらに具備してもよい。前記張力発生機構は、前記アーチ領域に設けられ前記ハンドルの引き出し方向とは逆の方向へ一定荷重を付与する第１の定荷重バネを有する。
これにより、引き出された送出配管の筐体内への収納が容易となる。 The liquefied gas generator may further include a tension generating mechanism provided inside the housing. The tension generating mechanism has a first constant load spring provided in the arch region and applying a constant load in a direction opposite to the pull-out direction of the handle.
This facilitates storage of the drawn delivery pipe in the housing.

前記張力発生機構は、前記垂下領域に設けられ前記ハンドルの引き出し方向へ一定の荷重を付与する第２の定荷重バネをさらに有してもよい。
これにより、送出配管の垂下領域の引き上げ力がアシストされるため、ハンドルの引き出し操作が容易となる。 The tension generating mechanism may further have a second constant load spring provided in the hanging region and applying a constant load in the pulling direction of the handle.
As a result, the pulling force of the hanging region of the delivery pipe is assisted, so that the handle can be easily pulled out.

前記操作部は、前記ハンドルを磁気的に吸着する保持部を有してもよい。
これにより、操作部に対するハンドルの着脱を容易に行うことができる。 The operation unit may have a holding unit that magnetically attracts the handle.
This makes it possible to easily attach / detach the handle to / from the operation unit.

前記送出配管は、真空断熱層を有する二重管フレキシブルホースで構成されてもよい。
これにより、送出配管内の液化ガスの気化を防止でき、送出配管の長尺化にも対応することが可能となる。 The delivery pipe may be composed of a double pipe flexible hose having a vacuum heat insulating layer.
This makes it possible to prevent the vaporization of the liquefied gas in the delivery pipe and to cope with the lengthening of the delivery pipe.

前記操作部は、前記取出口から送出される低温液化ガスを受容する容器を支持することが可能に構成された支持台を有してもよい。
これにより、簡便に低温液化ガスを取り出すことが可能となる。 The operation unit may have a support base configured to be able to support a container that receives the cryogenic liquefied gas delivered from the outlet.
This makes it possible to easily take out the low temperature liquefied gas.

以上述べたように、本発明によれば、装置の設置占有面積を低減することができるとともに、取出口の位置の変更も可能である。 As described above, according to the present invention, it is possible to reduce the installation occupied area of the device and also to change the position of the outlet.

本発明の一実施形態に係る低温液化ガス発生装置を示す全体斜視図である。It is an overall perspective view which shows the cryogenic liquefied gas generator which concerns on one Embodiment of this invention. 上記低温液化ガス発生装置の構成を概略的に示すブロック図である。It is a block diagram which shows schematic structure of the said low temperature liquefied gas generator. 上記低温液化ガス発生装置の要部の側断面図である。It is a side sectional view of the main part of the said low temperature liquefied gas generator. 図３におけるＡ－Ａ断面図である。FIG. 3 is a cross-sectional view taken along the line AA in FIG. 図４におけるＢ－Ｂ断面図である。FIG. 4 is a sectional view taken along the line BB in FIG. 上記低温液化ガス発生装置の機能ブロック図である。It is a functional block diagram of the said low temperature liquefied gas generator. 上記低温液化ガス発生装置における送出配管の要部側面図である。It is a side view of the main part of the delivery pipe in the said low temperature liquefied gas generator. 上記送出配管が引き出された状態を示す低温液化ガス発生装置の側断面図である。It is a side sectional view of the low temperature liquefied gas generator which shows the state which the said delivery pipe was pulled out.

以下、図面を参照しながら、本発明の実施形態を説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の一実施形態に係る低温液化ガス発生装置を示す全体斜視図である。図においてＸ軸、Ｙ軸及びＺ軸は、相互に直交する３軸方向を示しており、Ｚ軸は鉛直方向に相当する。
本実施形態では、低温液化ガス発生装置として、液体窒素発生装置を例に挙げて説明する。 FIG. 1 is an overall perspective view showing a cryogenic liquefied gas generator according to an embodiment of the present invention. In the figure, the X-axis, the Y-axis, and the Z-axis show triaxial directions orthogonal to each other, and the Z-axis corresponds to the vertical direction.
In the present embodiment, a liquid nitrogen generator will be described as an example of the cryogenic liquefied gas generator.

［低温液化ガス発生装置の全体構成］
本実施形態の液体窒素発生装置１００は、液体窒素を発生させ、貯留し、取り出すのに必要なすべての機器を収納する筐体１０を備える。
本実施形態において、筐体１０は、正面１１と、背面１２と、２つの側面１３と、天面１４とを有する縦長の直方体で構成される。筐体１０の正面１１には、液体窒素を外部へ取り出すための操作部２０が設けられる。 [Overall configuration of low temperature liquefied gas generator]
The liquid nitrogen generator 100 of the present embodiment includes a housing 10 that houses all the equipment necessary for generating, storing, and taking out liquid nitrogen.
In the present embodiment, the housing 10 is composed of a vertically long rectangular parallelepiped having a front surface 11, a back surface 12, two side surfaces 13, and a top surface 14. An operation unit 20 for taking out liquid nitrogen to the outside is provided on the front surface 11 of the housing 10.

以下、液体窒素発生装置１００の全体構成について説明する。図２は、液体窒素発生装置１００の構成を概略的に示すブロック図である。 Hereinafter, the overall configuration of the liquid nitrogen generator 100 will be described. FIG. 2 is a block diagram schematically showing the configuration of the liquid nitrogen generator 100.

図２に示すように、液体窒素発生装置１００は、液体窒素を貯留する貯留タンク３１と、貯留タンク３１へ液化すべきガス（本実施形態では窒素ガス）を導入するガス導入器３２と、貯留タンク３１へ導入された窒素ガスを冷却して液化させる冷凍機３３を含む冷凍回路と、液体窒素の取出口５１を先端部に有する送出配管５０等を備える。筐体１０は、これら貯留タンク３１、冷凍回路、ガス導入器３２、送出配管５０等を内部に収容する。 As shown in FIG. 2, the liquid nitrogen generator 100 includes a storage tank 31 for storing liquid nitrogen, a gas introducer 32 for introducing a gas to be liquefied (nitrogen gas in this embodiment) into the storage tank 31, and storage. A refrigerating circuit including a refrigerating machine 33 for cooling and liquefying the nitrogen gas introduced into the tank 31 and a delivery pipe 50 having a liquid nitrogen outlet 51 at the tip thereof are provided. The housing 10 houses the storage tank 31, the refrigerating circuit, the gas introducer 32, the delivery pipe 50, and the like.

貯留タンク３１は、上部に開口部３１０を有する断熱容器で構成される。開口部３１０には蓋３１１が気密に取り付けられている。貯留タンク３１は、液体窒素の貯留量を所定範囲に維持するための液面センサ３１２を有する。液面センサ３１２の構成は特に限定されず、液面の位置を図示するように２つのセンサを用いて検出する場合のほか、単一の棒状のセンサを用いて検出するようにしてもよい。 The storage tank 31 is composed of a heat insulating container having an opening 310 at the top. A lid 311 is airtightly attached to the opening 310. The storage tank 31 has a liquid level sensor 312 for maintaining the storage amount of liquid nitrogen within a predetermined range. The configuration of the liquid level sensor 312 is not particularly limited, and the position of the liquid level may be detected by using two sensors as shown in the figure or by using a single rod-shaped sensor.

ガス導入器３２は、蓋３１１を貫通して開口部３１０に連絡する導入配管４１を介して、窒素ガスを貯留タンク３１内に導入する。ガス導入器３２は、例えば、ＰＳＡ（Pressure Swing Adsorption）方式により、吸着剤に酸素ガスを吸着して加圧と減圧の操作を交互に繰り返しながら、空気から窒素ガスを取り出す空気分離装置で構成される。筐体１０の正面１１には、ガス導入器３２に取り込まれる空気が通過する通気部１１ａ（図１参照）が設けられる。 The gas introducer 32 introduces nitrogen gas into the storage tank 31 via an introduction pipe 41 that penetrates the lid 311 and communicates with the opening 310. The gas introducer 32 is composed of, for example, an air separation device that takes out nitrogen gas from air while adsorbing oxygen gas to an adsorbent and alternately repeating pressurization and depressurization operations by a PSA (Pressure Swing Adsorption) method. To. A ventilation portion 11a (see FIG. 1) through which air taken into the gas introducer 32 passes is provided on the front surface 11 of the housing 10.

冷凍機３３は、貯留タンク３１の蓋３１１に設置されるとともに、開口部３１０を介して貯留タンク３１内に突出するコールドヘッド３３ａを有する。冷凍機３３は、冷凍機３３とともに冷凍回路を構成する圧縮機ユニット３４から冷媒ガス（例えばヘリウム）の供給を受け、コールドヘッド３３ａを極低温（本例では液体窒素の沸点（７７Ｋ）以下の温度）に維持する。コールドヘッド３３ａは、導入配管４１を介して開口部３１０に導入された窒素ガスを冷却、液化させる。これにより液体窒素が発生し、貯留タンク３１に貯えられる。 The refrigerator 33 is installed on the lid 311 of the storage tank 31 and has a cold head 33a protruding into the storage tank 31 through the opening 310. The refrigerator 33 receives a refrigerant gas (for example, helium) from the compressor unit 34 constituting the refrigerating circuit together with the refrigerator 33, and lowers the cold head 33a to an extremely low temperature (in this example, a temperature equal to or lower than the boiling point (77K) of liquid nitrogen). ). The cold head 33a cools and liquefies the nitrogen gas introduced into the opening 310 via the introduction pipe 41. As a result, liquid nitrogen is generated and stored in the storage tank 31.

貯留タンク３１の蓋３１１には、貯留された液体窒素を取り出すための取出用配管４２と、貯留タンク３１内の上部ガスを排出するための排気用配管４３とが接続されている。
取出用配管４２は、液体窒素が取り出されるときに開放される開閉弁４２ｖを有する。取出用配管４２の一端は、貯留タンク３１の底部近傍（液体窒素の液面Ｌｓよりも低い位置）に配置され、他端は後述する送出配管５０に接続される。
排気用配管４３は、貯留タンク３１内の上部ガスを排出するときに開放される開閉弁４３ｖを有する。排気用配管４３の一端は、貯留タンク３１の開口部３１０の近傍（液体窒素の液面Ｌｓよりも高い位置）に配置され、他端は筐体１０の内部、あるいは筐体１０の外部に配置される。 The lid 311 of the storage tank 31 is connected to a take-out pipe 42 for taking out the stored liquid nitrogen and an exhaust pipe 43 for discharging the upper gas in the storage tank 31.
The take-out pipe 42 has an on-off valve 42v that is opened when liquid nitrogen is taken out. One end of the take-out pipe 42 is arranged near the bottom of the storage tank 31 (at a position lower than the liquid level Ls of liquid nitrogen), and the other end is connected to the delivery pipe 50 described later.
The exhaust pipe 43 has an on-off valve 43v that is opened when the upper gas in the storage tank 31 is discharged. One end of the exhaust pipe 43 is arranged in the vicinity of the opening 310 of the storage tank 31 (at a position higher than the liquid level Ls of liquid nitrogen), and the other end is arranged inside the housing 10 or outside the housing 10. Will be done.

図３は、筐体１０の内部構造を示す液体窒素発生装置１００の要部の側断面図、図４は、図３におけるＡ－Ａ断面図、図５は、図４におけるＢ－Ｂ断面図である。各図においては、各機器を接続する配管等の図示は省略している。 3 is a side sectional view of a main part of the liquid nitrogen generator 100 showing the internal structure of the housing 10, FIG. 4 is a sectional view taken along the line AA in FIG. 3, and FIG. 5 is a sectional view taken along the line BB in FIG. Is. In each figure, the piping for connecting each device is not shown.

筐体１０の内部は、仕切壁１７によって上下に区画された２つの室（第１の室１５及び第２の室１６）を有する。下側の第１の室１５には、ガス導入器３２、圧縮機ユニット３４等が配置され、上側の第２の室１６には貯留タンク３１、冷凍機３３等が配置されている。本実施形態において圧縮機ユニット３４は、第１の室１５に配置されるが、第２の室１６に配置されてもよい。 The inside of the housing 10 has two chambers (first chamber 15 and second chamber 16) vertically partitioned by a partition wall 17. A gas introducer 32, a compressor unit 34, etc. are arranged in the lower first chamber 15, and a storage tank 31, a refrigerator 33, etc. are arranged in the upper second chamber 16. In the present embodiment, the compressor unit 34 is arranged in the first chamber 15, but may be arranged in the second chamber 16.

図６は、液体窒素発生装置１００の機能ブロック図である。 FIG. 6 is a functional block diagram of the liquid nitrogen generator 100.

液体窒素発生装置１００は、ガス導入器３２、圧縮機ユニット３４、開閉弁４２ｖ，４３ｖ等を制御するコントローラ３５をさらに備える。コントローラ３５は、典型的にはコンピュータで構成される。コントローラ３５は、後述する操作部２０、液面センサ３１２等の出力に基づいて、ガス導入器３２、圧縮機ユニット３４、開閉弁４２ｖ，４３ｖ等を制御する。
コントローラ３５は、本実施形態では第２の室１６に設置されるが、これに限られず、第１の室１５に設置されてもよい。 The liquid nitrogen generator 100 further includes a controller 35 that controls a gas introducer 32, a compressor unit 34, on-off valves 42v, 43v, and the like. The controller 35 is typically composed of a computer. The controller 35 controls the gas introducer 32, the compressor unit 34, the on-off valves 42v, 43v, etc., based on the outputs of the operation unit 20, the liquid level sensor 312, etc., which will be described later.
The controller 35 is installed in the second chamber 16 in the present embodiment, but the present invention is not limited to this, and the controller 35 may be installed in the first chamber 15.

液体窒素発生装置１００は、液体窒素を外部へ取り出すための送出配管５０をさらに備える。送出配管５０は、筐体１０の正面１１に設けられた通孔１１ｗ（図３参照）を介して筐体１０の外側と内側との間にわたって引き回された長尺のフレキシブルホースで構成される。 The liquid nitrogen generator 100 further includes a delivery pipe 50 for taking out liquid nitrogen to the outside. The delivery pipe 50 is composed of a long flexible hose routed between the outside and the inside of the housing 10 through a through hole 11w (see FIG. 3) provided in the front surface 11 of the housing 10. ..

送出配管５０は、貯留タンク３１に連絡する基端部５０ａ（図４参照）と、液体窒素の取出口５１を有する先端部５０ｂ（図３参照）とを有する。送出配管５０の基端部５０ａは、筐体１０の内部に固定された支持金具１８を介して取出用配管４２（図２参照）に接続される。送出配管５０の先端部５０ｂは、筐体１０の外部に設けられた操作部２０に着脱可能に保持される。送出配管５０は、典型的には、真空断熱層を有する二重構造のフレキシブルホースで構成される。 The delivery pipe 50 has a base end portion 50a (see FIG. 4) communicating with the storage tank 31 and a tip end portion 50b (see FIG. 3) having a liquid nitrogen outlet 51. The base end portion 50a of the delivery pipe 50 is connected to the take-out pipe 42 (see FIG. 2) via a support metal fitting 18 fixed inside the housing 10. The tip portion 50b of the delivery pipe 50 is detachably held by an operation unit 20 provided outside the housing 10. The delivery pipe 50 is typically composed of a double-structured flexible hose with a vacuum insulation layer.

［操作部］
操作部２０は、図１及び図３に示すように、正面１１の概略中央部に設置される。操作部２０は、ケース部２１と、保持部２２と、支持台２３とを有する。 [Operation unit]
As shown in FIGS. 1 and 3, the operation unit 20 is installed at the substantially central portion of the front surface 11. The operation unit 20 has a case unit 21, a holding unit 22, and a support base 23.

ケース部２１は、下端が開放された縦長の箱体であり、送出配管５０の先端部５０ｂをケース部２１の直下から垂れ落とすガイド壁としての機能を有する。ケース部２１の前面には、液体窒素の取り出し及びその停止、取り出し量等を設定する複数の操作キーを備えた操作盤２４が設置される。 The case portion 21 is a vertically long box body having an open lower end, and has a function as a guide wall for hanging the tip portion 50b of the delivery pipe 50 from directly below the case portion 21. On the front surface of the case portion 21, an operation panel 24 having a plurality of operation keys for setting the removal, stop, removal amount, etc. of liquid nitrogen is installed.

保持部２２は、ケース部２１の下端から突出する送出配管５０の先端部５０ｂを着脱可能に保持する。本実施形態において送出配管５０の先端部５０ｂは、取出口５１の近傍位置に固定されたハンドル５２を有し、このハンドル５２を介して先端部５０ｂが保持部２２に保持される。そして、保持部２２は、上下方向に離間して配置された一対のマグネット部Ｍを有し、これらマグネット部Ｍを介してハンドル５２を磁気的に吸着し、取出口５１が下方に向いた姿勢でハンドル５２（送出配管５０）を保持する。 The holding portion 22 detachably holds the tip portion 50b of the delivery pipe 50 protruding from the lower end of the case portion 21. In the present embodiment, the tip portion 50b of the delivery pipe 50 has a handle 52 fixed in the vicinity of the take-out port 51, and the tip portion 50b is held by the holding portion 22 via the handle 52. The holding portion 22 has a pair of magnet portions M arranged apart from each other in the vertical direction, and the handle 52 is magnetically attracted through the magnet portions M so that the outlet 51 faces downward. Holds the handle 52 (delivery pipe 50).

図７は、ハンドル５２の構成を示す側面図である。ハンドル５２は、ユーザが把持可能な合成樹脂製のグリップ部５２１と、保持部２２の一対のマグネットＭに対応するようにグリップ部５２１の上下に配置された一対の磁性板５２２とを有する。グリップ部５２１の上下方向の両端には、金属製の補強板５２３が取り付けられている。グリップ部５２１の下端に取り付けられた補強板５２３は、取出口５１から流出する液体窒素の蒸気（冷気）からグリップ部５２１を保護する保護板としての機能をも有する。 FIG. 7 is a side view showing the configuration of the handle 52. The handle 52 has a grip portion 521 made of synthetic resin that can be gripped by the user, and a pair of magnetic plates 522 arranged above and below the grip portion 521 so as to correspond to the pair of magnets M of the holding portion 22. Metal reinforcing plates 523 are attached to both ends of the grip portion 521 in the vertical direction. The reinforcing plate 523 attached to the lower end of the grip portion 521 also has a function as a protective plate that protects the grip portion 521 from the vapor (cold air) of liquid nitrogen flowing out from the outlet 51.

グリップ部５２１は、ユーザが素手であるいはグローブ越しに把持可能な適宜の大きさ及び形状に形成される。グリップ部５２１の内部には、送出配管５０の真空断熱層５０ｃを真空に維持する閉止弁５０ｖが内蔵されている。グリップ部５２１から取出口５１までの送出配管５０の長さは特に限定されず、典型的には、１００ｍｍ前後である。本実施形態では送出配管５０として、内径９ｍｍ、外径３０ｍｍの二重管が用いられるが、径の大きさは勿論これに限られない。 The grip portion 521 is formed in an appropriate size and shape that can be gripped by the user with bare hands or through a glove. Inside the grip portion 521, a shutoff valve 50v for maintaining the vacuum heat insulating layer 50c of the delivery pipe 50 in a vacuum is built. The length of the delivery pipe 50 from the grip portion 521 to the take-out port 51 is not particularly limited, and is typically around 100 mm. In the present embodiment, a double pipe having an inner diameter of 9 mm and an outer diameter of 30 mm is used as the delivery pipe 50, but the size of the diameter is not limited to this, of course.

支持台２３は、保持部２２に保持された送出配管５０の取出口５１から送出される液体窒素を受容する容器１を支持することが可能に構成される。支持台２３は、筐体１０の正面の適宜の高さ位置に設けられる。支持台２３の床面からの高さは特に限定されず、典型的には、ユーザの腰の高さ（約６００ｍｍ～８００ｍｍ）に設定される。これにより、ユーザが立位姿勢で液体窒素を取り出すことができる。支持台２３は、金属製あるいは合成樹脂製であり、固定式であってもよいし、折り畳み式であってもよいし、液化ガスの飛散を防止するカバーを有していてもよい。 The support base 23 is configured to be able to support the container 1 that receives the liquid nitrogen delivered from the outlet 51 of the delivery pipe 50 held by the holding portion 22. The support base 23 is provided at an appropriate height position on the front surface of the housing 10. The height of the support base 23 from the floor surface is not particularly limited, and is typically set to the height of the user's waist (about 600 mm to 800 mm). This allows the user to take out liquid nitrogen in a standing position. The support base 23 is made of metal or synthetic resin, may be a fixed type, may be a foldable type, or may have a cover for preventing the scattering of liquefied gas.

操作部２０は、非常ボタン２５をさらに有する。非常ボタン２５は、液体窒素発生装置１００を緊急で停止させたいとき等に押圧操作される。非常ボタン２５は、本実施形態では、筐体１０の正面１１の適宜の位置に保持部２２と同等の高さで設置されるが、これに限られず、正面１１の上部付近に設置されてもよい。 The operation unit 20 further includes an emergency button 25. The emergency button 25 is pressed to stop the liquid nitrogen generator 100 in an emergency. In the present embodiment, the emergency button 25 is installed at an appropriate position on the front surface 11 of the housing 10 at the same height as the holding portion 22, but the emergency button 25 is not limited to this and may be installed near the upper portion of the front surface 11. good.

［引出し機構］
本実施形態において、送出配管５０は、ハンドル５２を介して操作部２０から筐体１０の外側へ引き出すことが可能に構成される。図８は、送出配管５０の先端部５０ｂ（ハンドル５２）を筐体１０の外部へ引き出した状態を示す側断面図である。以下、この送出配管５０の引出し機構について説明する。 [Drawer mechanism]
In the present embodiment, the delivery pipe 50 is configured to be able to be pulled out from the operation unit 20 to the outside of the housing 10 via the handle 52. FIG. 8 is a side sectional view showing a state in which the tip portion 50b (handle 52) of the delivery pipe 50 is pulled out to the outside of the housing 10. Hereinafter, the pull-out mechanism of the delivery pipe 50 will be described.

送出配管５０は、図３及び図４に示すような形態で引き回された状態で筐体１０の内部に収容される。より具体的に、送出配管５０は、筐体１０の正面１１と背面１２との間において貯留タンク３１の上部に架け渡されるアーチ領域５０１と、貯留タンク３１よりも背面１２側に位置し重力方向に垂下する垂下領域５０２とを有する。 The delivery pipe 50 is housed inside the housing 10 in a state of being routed in the form shown in FIGS. 3 and 4. More specifically, the delivery pipe 50 is located on the back surface 12 side of the storage tank 31 and the arch region 501 spanning the upper part of the storage tank 31 between the front surface 11 and the back surface 12 of the housing 10, and is located in the direction of gravity. It has a drooping area 502 and a drooping area 502.

送出配管５０のアーチ領域５０１は、筐体１０の通孔１１ｗと配管ガイド６１との間に架け渡された配管部位である。配管ガイド６１は、筐体１０内部の背面１２側において通孔１１ｗよりも高い位置に設置される。配管ガイド６１は、例えば、筐体１０の第２の室１６に立設された支持壁部１９（図４，５参照）に設置されたガイド受け６２により支持される。 The arch region 501 of the delivery pipe 50 is a pipe portion bridged between the through hole 11w of the housing 10 and the pipe guide 61. The piping guide 61 is installed at a position higher than the through hole 11w on the back surface 12 side inside the housing 10. The piping guide 61 is supported by, for example, a guide receiver 62 installed on a support wall portion 19 (see FIGS. 4 and 5) erected in the second chamber 16 of the housing 10.

一方、送出配管５０の垂下領域５０２は、配管ガイド６１から支持金具１８（図４参照）との間で垂直方向に折り返された配管部位である。垂下領域５０２の配管長は、操作部２０から引き出されるハンドル５２の長さによって変化する（図８参照）。 On the other hand, the hanging region 502 of the delivery pipe 50 is a pipe portion that is vertically folded back from the pipe guide 61 to the support metal fitting 18 (see FIG. 4). The pipe length of the hanging region 502 varies depending on the length of the handle 52 pulled out from the operation unit 20 (see FIG. 8).

垂下領域５０２の所定位置には、ハンドル５２の引き出し長さを所定以下に制限するストッパ６３が取り付けられている。ストッパ６３は、ハンドル５２の引き出し操作に連動して上昇し、ガイド受け６２の下端部６２ａに当接する距離まで上昇した時点で、ハンドル５２の引き出し操作が制限される。ストッパ６３がガイド受け６２に当接するまでの上昇距離は、ハンドル５２の最大引き出し長さに相当する。 A stopper 63 that limits the pull-out length of the handle 52 to a predetermined position or less is attached to a predetermined position of the hanging region 502. The stopper 63 rises in conjunction with the pull-out operation of the handle 52, and when it rises to a distance of contact with the lower end portion 62a of the guide receiver 62, the pull-out operation of the handle 52 is restricted. The climbing distance until the stopper 63 comes into contact with the guide receiver 62 corresponds to the maximum pull-out length of the handle 52.

本実施形態において、ストッパ６３の上記上昇距離は、例えば６００～７００ｍｍであり、この場合の送出配管５０の取出口５１の床面からの高さ（Ｈ）は、例えば、２５０ｍｍ～３５０ｍｍとなるように保持部２２の位置が設定される。 In the present embodiment, the climbing distance of the stopper 63 is, for example, 600 to 700 mm, and the height (H) of the outlet 51 of the delivery pipe 50 from the floor surface in this case is, for example, 250 mm to 350 mm. The position of the holding portion 22 is set to.

本実施形態の液体窒素発生装置１００は、筐体１０の内部に設けられた張力発生機構７０をさらに備える。張力発生機構７０は、ハンドル５２の引き出し方向とは逆の方向へ一定荷重を付与する第１の定荷重バネ７１を有する。第１の定荷重バネ７１は、送出配管５０のアーチ領域５０１に設けられる。より具体的に、第１の定荷重バネ７１は、筐体１０の天面１４の内壁面に固定され、送出配管５０のアーチ領域５０１の所定位置に取り付けられた固定具７１２に一端が固定されたワイヤ７１１を有する。ワイヤ７１１は、配管ガイド６１の上部に設置された滑車７１３に支持される。 The liquid nitrogen generator 100 of the present embodiment further includes a tension generating mechanism 70 provided inside the housing 10. The tension generation mechanism 70 has a first constant load spring 71 that applies a constant load in a direction opposite to the pull-out direction of the handle 52. The first constant load spring 71 is provided in the arch region 501 of the delivery pipe 50. More specifically, the first constant load spring 71 is fixed to the inner wall surface of the top surface 14 of the housing 10, and one end thereof is fixed to the fixture 712 attached to a predetermined position of the arch region 501 of the delivery pipe 50. Has a wire 711. The wire 711 is supported by a pulley 713 installed on the upper part of the piping guide 61.

第１の定荷重バネ７１は、典型的には、巻取式のゼンマイバネで構成される。第１の定荷重バネ７１により、送出配管５０の引出し長に依存することなく一定の引出し力で送出配管５０を引き出すことができる。また、引き出された送出配管５０を、筐体１０の内部に向けて自動的に引き戻すことができる。 The first constant load spring 71 is typically composed of a winding type spring. With the first constant load spring 71, the delivery pipe 50 can be pulled out with a constant pull-out force without depending on the pull-out length of the delivery pipe 50. Further, the drawn delivery pipe 50 can be automatically pulled back toward the inside of the housing 10.

第１の定荷重バネ７１は、一方向回転機構部７１４（図５参照）をさらに有してもよい。一方向回転機構部７１４は、典型的には、ワイヤ７１１の繰り出し操作に連動して回転するラッチ歯を有し、所定の繰り出し単位長さでワイヤ７１１をその位置に保持することが可能に構成される。これにより、送出配管５０を任意の長さで引き出すことができる。一方向回転機構部７１４によるラッチ解除の機構は特に限定されず、送出配管５０に引き出し操作に連動して解除される機構、適宜のキー操作によって解除される機構等が採用可能である。 The first constant load spring 71 may further include a unidirectional rotation mechanism unit 714 (see FIG. 5). The one-way rotation mechanism unit 714 typically has a latch tooth that rotates in conjunction with the feeding operation of the wire 711, and is configured to be able to hold the wire 711 at that position with a predetermined feeding unit length. Will be done. As a result, the delivery pipe 50 can be pulled out at an arbitrary length. The mechanism for releasing the latch by the one-way rotation mechanism unit 714 is not particularly limited, and a mechanism for releasing the latch in conjunction with the withdrawal operation, a mechanism for releasing the latch by an appropriate key operation, or the like can be adopted for the delivery pipe 50.

張力発生機構７０はさらに、ハンドル５２の引き出し方向へ一定の荷重を付与する第２の定荷重バネ７２を有する。第２の定荷重バネ７２は、送出配管５０の垂下領域５０２に設けられる。より具体的に、第２の定荷重バネ７２は、筐体１０の天面１４の内壁面に固定され、送出配管５０の垂下領域５０２の所定位置に取り付けられた固定具（本実施形態ではストッパ６３）に一端が固定されたワイヤ７２１を有する。 The tension generating mechanism 70 further has a second constant load spring 72 that applies a constant load in the pulling direction of the handle 52. The second constant load spring 72 is provided in the hanging region 502 of the delivery pipe 50. More specifically, the second constant load spring 72 is fixed to the inner wall surface of the top surface 14 of the housing 10 and is attached to a predetermined position of the hanging region 502 of the delivery pipe 50 (stopper in this embodiment). It has a wire 721 with one end fixed to 63).

第１の定荷重バネ７２は、第１の定荷重バネ７１と同様に、巻取式のゼンマイバネで構成される。第２の定荷重バネ７２により、送出配管５０の垂下領域５０２の引き上げ力がアシストされるため、ハンドル５２の引き出し操作が容易となる。 Like the first constant load spring 71, the first constant load spring 72 is composed of a winding type spring. Since the second constant load spring 72 assists the pulling force of the hanging region 502 of the delivery pipe 50, the pull-out operation of the handle 52 becomes easy.

第１の定荷重バネ７１及び第２の定荷重バネ７２のバネ力は特に限定されず、これらの間の大小関係も問われない。例えば、垂下領域５０２の長さが大きいほど、ハンドル５２を操作部２０側へ引き戻す力が強くなる。この場合は、第１の定荷重バネ７１は、第２の定荷重バネ７２よりもバネ力を小さくすることができる。 The spring force of the first constant load spring 71 and the second constant load spring 72 is not particularly limited, and the magnitude relationship between them does not matter. For example, the larger the length of the hanging region 502, the stronger the force for pulling the handle 52 back to the operation unit 20 side. In this case, the first constant load spring 71 can have a smaller spring force than the second constant load spring 72.

［低温液化ガス発生装置の動作］
次に、本実施形態の液体窒素発生装置１００の典型的な動作について説明する。 [Operation of low temperature liquefied gas generator]
Next, a typical operation of the liquid nitrogen generator 100 of the present embodiment will be described.

液体窒素発生装置１００においては、ガス導入器３２によって貯留タンク３１へ窒素ガスが導入される。このとき、取出用配管４２の開閉弁４２ｖは閉じられ、排気用配管４３の開閉弁４３ｖは開放される。貯留タンク３１へ導入された窒素ガスは、コールドヘッド３３ａによって冷却、液化し、貯留タンク３１内へ貯留される。液化されずに残留するガスは、排気用配管４３を介して貯留タンク３１の外部へ排気される。液体窒素の貯留量が所定以上になったことを液面センサ３１２によって検出されると、冷凍機３３は停止する。このとき、圧縮機ユニット３４及びガス導入器３２は停止してもよい。 In the liquid nitrogen generator 100, nitrogen gas is introduced into the storage tank 31 by the gas introducer 32. At this time, the on-off valve 42v of the take-out pipe 42 is closed, and the on-off valve 43v of the exhaust pipe 43 is opened. The nitrogen gas introduced into the storage tank 31 is cooled and liquefied by the cold head 33a, and is stored in the storage tank 31. The gas remaining without being liquefied is exhausted to the outside of the storage tank 31 via the exhaust pipe 43. When the liquid level sensor 312 detects that the amount of liquid nitrogen stored has exceeded a predetermined level, the refrigerator 33 is stopped. At this time, the compressor unit 34 and the gas introducer 32 may be stopped.

操作盤２４上の液体窒素取出し用の操作キーが入力されると、取出用配管４２の開閉弁４２ｖは開放され、排気用配管４３の開閉弁４３ｖが閉じられる。これにより、ガス導入器３２から供給される窒素ガスで貯留タンク３１の内圧が上昇し、液体窒素が取出用配管４２及び送出配管５０を介して取出口５１に向けて送出される。液体窒素取出し停止用の操作キーが入力されると、取出用配管４２の開閉弁４２ｖは閉じられ、排気用配管４３の開閉弁４３ｖが開放されることで、液体窒素の取出しが停止する。 When the operation key for taking out liquid nitrogen on the operation panel 24 is input, the on-off valve 42v of the taking-out pipe 42 is opened, and the on-off valve 43v of the exhaust pipe 43 is closed. As a result, the internal pressure of the storage tank 31 rises due to the nitrogen gas supplied from the gas introducer 32, and liquid nitrogen is sent out to the take-out port 51 via the take-out pipe 42 and the take-out pipe 50. When the operation key for stopping the removal of liquid nitrogen is input, the on-off valve 42v of the take-out pipe 42 is closed, and the on-off valve 43v of the exhaust pipe 43 is opened, so that the take-out of liquid nitrogen is stopped.

ここで、図１及び図３に示すように、送出配管５０のハンドル５２が保持部２２に保持されている場合、取出口５１から流出した液体窒素は、支持台２３に載置された容器１に受容される。この場合、容器１の容量が既知の場合、液体窒素の送出量が容器１を充填する程度の所定値に達した時点で液体窒素の取出し操作が自動的に終了するように構成されてもよい。 Here, as shown in FIGS. 1 and 3, when the handle 52 of the delivery pipe 50 is held by the holding portion 22, the liquid nitrogen flowing out from the outlet 51 is placed in the container 1 placed on the support base 23. Is accepted by. In this case, if the capacity of the container 1 is known, the liquid nitrogen extraction operation may be automatically terminated when the delivery amount of the liquid nitrogen reaches a predetermined value sufficient to fill the container 1. ..

一方、図７に示すようにハンドル５２を介して送出配管５０を操作部２０から引き出して、取出口５１の位置や高さを変更することができる。例えば、液体窒素を受容する容器が支持台２３に設置できないほど大型である場合などは、送出配管５０の取出口５１を床面に向けて引き出すことで、床面上に載置した容器に向けて液体窒素が供給される。 On the other hand, as shown in FIG. 7, the delivery pipe 50 can be pulled out from the operation unit 20 via the handle 52, and the position and height of the outlet 51 can be changed. For example, when the container that receives liquid nitrogen is too large to be installed on the support base 23, the outlet 51 of the delivery pipe 50 is pulled out toward the floor so that the container is placed on the floor. Liquid nitrogen is supplied.

本実施形態の液体窒素発生装置１００によれば、貯留タンク３１、冷凍機３３及び圧縮機ユニット３４を含む冷凍回路、ガス導入器３２及び送出配管５０がそれぞれ共通の筐体１０に収容されているため、装置全体のコンパクト化と設置面積の低減を図ることができる。特に、これらが筐体１０の上下に区画された第１及び第２の室１５，１６に３次元的に配置されているため、筐体１０内への収納効率が高まり、設置スペースの低減に貢献することができる。 According to the liquid nitrogen generator 100 of the present embodiment, the storage tank 31, the refrigerator 33 including the refrigerator 33 and the compressor unit 34, the gas introducer 32, and the delivery pipe 50 are housed in a common housing 10. Therefore, the entire device can be made compact and the installation area can be reduced. In particular, since these are three-dimensionally arranged in the first and second chambers 15 and 16 partitioned above and below the housing 10, the storage efficiency in the housing 10 is improved and the installation space is reduced. Can contribute.

また、筐体１０の正面に設けられた操作部２０に送出配管５０の先端部５０ｂが着脱可能に構成されているため、液体窒素の取出口５１の位置の変更が可能となる。特に、送出配管５０が筐体１０から引き出し可能に構成されているため、別途の接続用ホースを必要とすることなく、容器の種類や大きさに応じて液体窒素の取出口５１の高さ位置を容易に調整することができる。 Further, since the tip portion 50b of the delivery pipe 50 is detachably configured on the operation portion 20 provided on the front surface of the housing 10, the position of the liquid nitrogen outlet 51 can be changed. In particular, since the delivery pipe 50 is configured to be able to be pulled out from the housing 10, the height position of the liquid nitrogen outlet 51 according to the type and size of the container without the need for a separate connection hose. Can be easily adjusted.

さらに本実施形態によれば、送出配管５０がアーチ領域５０１と垂下領域５０２とを有するため、送出配管５０が比較的長尺の場合であっても、筐体１０内の限られたスペースに効率よく送出配管５０を収納することができる。 Further, according to the present embodiment, since the delivery pipe 50 has an arch region 501 and a hanging region 502, even if the delivery pipe 50 is relatively long, it is efficient in a limited space in the housing 10. The delivery pipe 50 can be well stored.

そして、張力発生機構７０（第１の定荷重バネ７１、第２の定荷重バネ７２）により、送出配管５０の各部に所定方向へ適宜の張力が付与されているため、送出配管５０が比較的長尺の場合であっても、送出配管５０の自重（及びその内部の液体窒素の重量）による取り扱い性の低下を抑えて、送出配管５０の引き出し操作及び引き戻し操作を容易に行うことができる。 Then, since an appropriate tension is applied to each part of the delivery pipe 50 in a predetermined direction by the tension generation mechanism 70 (first constant load spring 71, second constant load spring 72), the delivery pipe 50 is relatively relatively. Even in the case of a long length, it is possible to easily perform the pull-out operation and the pull-back operation of the delivery pipe 50 while suppressing the deterioration of the handleability due to the own weight of the delivery pipe 50 (and the weight of the liquid nitrogen inside the delivery pipe 50).

しかも、送出配管５０が真空断熱層５０ｃを有する二重配管のフレキシブルホースで構成されているため、送出配管５０が比較的長尺の場合であっても、貯留タンク３１から取出口５１までの間での送出配管５０内における液体窒素の気化を抑えて、液体窒素を安定に供給することができる。 Moreover, since the delivery pipe 50 is composed of a flexible hose of a double pipe having a vacuum heat insulating layer 50c, even if the delivery pipe 50 is relatively long, it is between the storage tank 31 and the outlet 51. It is possible to suppress the vaporization of liquid nitrogen in the delivery pipe 50 in the above and stably supply the liquid nitrogen.

以上、本発明の実施形態について説明したが、本発明は上述の実施形態にのみ限定されるものではなく種々変更を加え得ることは勿論である。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made.

例えば以上の実施形態では、低温液化ガス発生装置として、液体窒素発生装置１００を例に挙げて説明したが、これに限られず、液体酸素、液体空気等の他の低温液化ガス発生装置にも本発明は適用可能である。 For example, in the above embodiment, the liquid nitrogen generator 100 has been described as an example of the low temperature liquefied gas generator, but the present invention is not limited to this, and other low temperature liquefied gas generators such as liquid oxygen and liquid air can also be used. The invention is applicable.

また、送出配管５０の引き出し長を検出可能なセンサ、あるいは、ハンドル５２が保持部２２に保持された収納位置にあるかどうかを検出可能なセンサが備えられてもよい。この場合、ハンドル５２が上記収納位置にあるときとないときとで、液体窒素の取出し量を自動的に調整することが可能である。また、支持台２３上の容器１の有無を検出するセンサがさらに備えられてもよい。 Further, a sensor capable of detecting the pull-out length of the delivery pipe 50 or a sensor capable of detecting whether or not the handle 52 is in the storage position held by the holding portion 22 may be provided. In this case, it is possible to automatically adjust the amount of liquid nitrogen taken out depending on whether the handle 52 is in the storage position or not. Further, a sensor for detecting the presence / absence of the container 1 on the support base 23 may be further provided.

１０…筐体
２０…操作部
２２…保持部
２３…支持台
３１…貯留タンク
３２…ガス導入器
３３…冷凍機
３４…圧縮機ユニット
５０…送出配管
５０１…アーチ領域
５０２…垂下領域
５０ｂ…先端部
５１…取出口
５２…ハンドル
７０…張力発生機構
７１…第１の定荷重バネ
７２…第２の定荷重バネ
１００…液体窒素発生装置（低温液化ガス発生装置） 10 ... Housing 20 ... Operation unit 22 ... Holding unit 23 ... Support stand 31 ... Storage tank 32 ... Gas introducer 33 ... Refrigerator 34 ... Compressor unit 50 ... Delivery pipe 501 ... Arch area 502 ... Hanging area 50b ... Tip 51 ... Outlet 52 ... Handle 70 ... Tension generation mechanism 71 ... First constant load spring 72 ... Second constant load spring 100 ... Liquid nitrogen generator (low temperature liquefied gas generator)

Claims (6)

液化ガスを貯留する貯留タンクと、
前記貯留タンクへ液化すべきガスを導入するガス導入器と、
前記貯留タンクに導入されたガスを冷却して液化する冷凍機を含む冷凍回路と、
前記貯留タンクに連絡し、液化ガスの取出口を先端部に有する送出配管と、
前記送出配管の先端部を着脱可能に保持可能な操作部を有し、前記貯留タンク、前記冷凍回路、前記ガス導入器及び前記送出配管を収容する筐体と
を具備し、
前記送出配管の先端部は、前記取出口の近傍に固定されたハンドルを含み、
前記送出配管は、前記ハンドルを介して前記操作部から前記筐体の外側へ引き出すことが可能に構成され、
前記筐体は、前記操作部を有する正面と、前記正面に対向する背面とを有する縦長の直方体で構成され、
前記送出配管は、前記正面と前記背面との間において前記貯留タンクの上部に架け渡されるアーチ領域と、前記貯留タンクよりも前記背面側に位置し重力方向に垂下する垂下領域とを有する
低温液化ガス発生装置。 A storage tank that stores liquefied gas and
A gas introducer that introduces gas to be liquefied into the storage tank,
A refrigerating circuit including a refrigerator that cools and liquefies the gas introduced into the storage tank, and
A delivery pipe that contacts the storage tank and has an outlet for liquefied gas at the tip.
It has an operation unit that can detachably hold the tip of the delivery pipe, and includes the storage tank, the refrigeration circuit, the gas introducer, and a housing that accommodates the delivery pipe .
The tip of the delivery pipe includes a handle fixed in the vicinity of the outlet.
The delivery pipe is configured to be able to be pulled out from the operation unit to the outside of the housing via the handle.
The housing is composed of a vertically long rectangular parallelepiped having a front surface having the operation unit and a back surface facing the front surface.
The delivery pipe has an arch region extending over the upper part of the storage tank between the front surface and the back surface, and a hanging region located on the back surface side of the storage tank and hanging in the direction of gravity.
Cryogenic liquefied gas generator. 請求項１に記載の低温液化ガス発生装置であって、
前記筐体の内部に設けられた張力発生機構をさらに具備し、
前記張力発生機構は、前記アーチ領域に設けられ前記ハンドルの引き出し方向とは逆の方向へ一定荷重を付与する第１の定荷重バネを有する
低温液化ガス発生装置。 The cryogenic liquefied gas generator according to claim 1 .
Further equipped with a tension generating mechanism provided inside the housing,
The tension generation mechanism is a low-temperature liquefied gas generator provided in the arch region and having a first constant load spring that applies a constant load in a direction opposite to the pull-out direction of the handle. 請求項２に記載の低温液化ガス発生装置であって、
前記張力発生機構は、前記垂下領域に設けられ前記ハンドルの引き出し方向へ一定の荷重を付与する第２の定荷重バネをさらに有する
低温液化ガス発生装置。 The cryogenic liquefied gas generator according to claim 2 .
The tension generating mechanism is a low temperature liquefied gas generator further provided with a second constant load spring provided in the hanging region and applying a constant load in the pulling direction of the handle. 請求項１～３のいずれか１つに記載の低温液化ガス発生装置であって、
前記操作部は、前記ハンドルを磁気的に吸着する保持部を有する
低温液化ガス発生装置。 The cryogenic liquefied gas generator according to any one of claims 1 to 3 .
The operation unit is a cryogenic liquefied gas generator having a holding unit that magnetically attracts the handle. 請求項１～４のいずれか１つに記載の低温液化ガス発生装置であって、
前記送出配管は、真空断熱層を有する二重構造のフレキシブルホースで構成される
低温液化ガス発生装置。 The cryogenic liquefied gas generator according to any one of claims 1 to 4 .
The delivery pipe is a cryogenic liquefied gas generator composed of a double-structured flexible hose having a vacuum heat insulating layer. 請求項１～５のいずれか１つに記載の低温液化ガス発生装置であって、
前記操作部は、前記取出口から送出される低温液化ガスを受容する容器を支持することが可能に構成された支持台を有する
低温液化ガス発生装置。 The cryogenic liquefied gas generator according to any one of claims 1 to 5 .
The operation unit is a low-temperature liquefied gas generator having a support base configured to support a container that receives the low-temperature liquefied gas sent from the outlet.
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