JPH084093Y2 - Gas concentrator - Google Patents
Gas concentratorInfo
- Publication number
- JPH084093Y2 JPH084093Y2 JP12486590U JP12486590U JPH084093Y2 JP H084093 Y2 JPH084093 Y2 JP H084093Y2 JP 12486590 U JP12486590 U JP 12486590U JP 12486590 U JP12486590 U JP 12486590U JP H084093 Y2 JPH084093 Y2 JP H084093Y2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- adsorbent
- adsorption tower
- oxygen
- component
- 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
Links
- 239000007789 gas Substances 0.000 claims description 61
- 238000001179 sorption measurement Methods 0.000 claims description 45
- 239000003463 adsorbent Substances 0.000 claims description 31
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- 239000001301 oxygen Substances 0.000 claims description 28
- 229910052760 oxygen Inorganic materials 0.000 claims description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 27
- 239000000126 substance Substances 0.000 claims description 23
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 230000008929 regeneration Effects 0.000 description 6
- 238000011069 regeneration method Methods 0.000 description 6
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 5
- 229910021536 Zeolite Inorganic materials 0.000 description 4
- 239000010457 zeolite Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Separation Of Gases By Adsorption (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、圧力スイング式の気体濃縮装置に係り、特
に酸素等の磁化率の高い気体を濃縮するための気体濃縮
装置に関する。TECHNICAL FIELD The present invention relates to a pressure swing type gas concentrator, and more particularly to a gas concentrator for concentrating a gas having a high magnetic susceptibility such as oxygen.
現在、気体濃縮手段としての圧力スイング式（PSA
式）の気体濃縮装置は、酸素、窒素の空気中からの濃
縮、水素の精製等に用いられている。この方法では、深
冷分離法などによる精製方法に比べて、純度を上げるこ
とは困難であるものの、安価にこれらの濃縮気体を提供
することができるため、深冷分離法ほどの高純度を必要
としない分野において広く用いられるようになってき
た。Currently, pressure swing type (PSA
The gas concentrator of the formula) is used for concentrating oxygen and nitrogen from the air, refining hydrogen, and the like. Compared with refining methods such as the cryogenic separation method, it is more difficult to increase the purity with this method, but since these concentrated gases can be provided at a low cost, the high purity required for the cryogenic separation method is required. It has become widely used in fields that do not.
第３図（ａ）〜（ｃ）はこの従来の圧力スイング式気
体濃縮装置で酸素濃縮気体を得る場合の一例を示す。こ
の気体濃縮装置は、吸着剤を収容する吸着剤11を備え、
この吸着塔11の底部から流入ライン12を通じて圧縮機
（コンプレッサ）13により圧縮空気を供給するようにな
っている。吸着剤としては、酸素よりも窒素の平衡吸着
量を多く示すゼオライト系吸着剤などが用いられてい
る。FIGS. 3 (a) to 3 (c) show an example of the case where an oxygen-enriched gas is obtained by this conventional pressure swing type gas concentrator. This gas concentrator includes an adsorbent 11 that contains an adsorbent,
Compressed air is supplied from the bottom of the adsorption tower 11 through an inflow line 12 by a compressor (compressor) 13. As the adsorbent, a zeolite-based adsorbent having a larger equilibrium adsorption amount of nitrogen than oxygen is used.
この気体濃縮装置においては、圧力スイングサイクル
の吸着期には、第３図（ａ）に示すように圧縮機13によ
り流入ライン12を通じて吸着塔11の底部から圧縮空気を
流入させる。吸着塔11内に導入された圧縮空気は吸着剤
によりその窒素成分が優先的に吸着され、その結果酸素
濃縮気体となる。この酸素濃縮気体は同図（ｂ）に示す
ように、流出ライン14を通じて取り出される。酸素濃縮
気体を取り出した後、吸着塔11の再生期には、２通りの
方法が実用化されている。１つは、同図（ｃ）示すよう
に、流出ライン15を通じて真空ポンプ16等の真空源を用
いて吸着剤に吸着している気体成分（窒素濃縮気体）を
脱着する方法であり、もう１つは、同図（ｄ）に示すよ
うに、流出ライン14および流出ライン17を通じて酸素濃
縮気体を吸着塔11内に流し、これにより吸着成分を洗い
流す方法である。再生された吸着塔11は、再び吸着期に
移行し、このサイクルを繰り返す。In this gas concentrator, during the adsorption period of the pressure swing cycle, compressed air is made to flow from the bottom of the adsorption tower 11 through the inflow line 12 by the compressor 13 as shown in FIG. 3 (a). The nitrogen component of the compressed air introduced into the adsorption tower 11 is preferentially adsorbed by the adsorbent, and as a result, it becomes an oxygen-enriched gas. This oxygen-enriched gas is taken out through the outflow line 14 as shown in FIG. In the regeneration period of the adsorption tower 11 after taking out the oxygen-enriched gas, two methods have been put into practical use. One is a method of desorbing a gas component (nitrogen-enriched gas) adsorbed on an adsorbent using a vacuum source such as a vacuum pump 16 through an outflow line 15 as shown in FIG. One is a method of flowing an oxygen-enriched gas into the adsorption tower 11 through the outflow line 14 and the outflow line 17, as shown in FIG. The regenerated adsorption tower 11 shifts to the adsorption period again, and this cycle is repeated.
しかしながら、従来の圧力スイング式気体濃縮装置に
あっては、再生期において、特に第３図（ｄ）に示した
酸素濃縮気体で吸着成分を洗い流す方法では、吸着成分
の十分な除去が困難であるという問題があった。However, in the conventional pressure swing type gas concentrator, it is difficult to sufficiently remove the adsorbed component during the regeneration period, especially by the method of flushing the adsorbed component with the oxygen concentrated gas shown in FIG. 3 (d). There was a problem.
本考案はかかる問題点に鑑みてなされたものであっ
て、その目的は、再生期において吸着気体の除去効率が
向上しうる気体濃縮装置を提供することを目的とする。The present invention has been made in view of the above problems, and an object of the present invention is to provide a gas concentrator that can improve the removal efficiency of adsorbed gas during the regeneration period.
本考案による気体濃縮装置は、吸着剤が収容される吸
着塔と、この吸着塔内に混合気体を供給する混合気体供
給手段と、前記吸着塔から特定成分が濃縮された非吸着
成分を取り出す非吸着成分取出し手段と、前記非吸着成
分を取り出した後に前記吸着塔内の吸着成分を除去する
吸着成分除去手段とを備えた気体濃縮装置において、前
記吸着塔内に吸着剤とともに磁性物質を分散させて配置
させたものである。The gas concentrator according to the present invention comprises an adsorption tower in which an adsorbent is housed, a mixed gas supply means for supplying a mixed gas into the adsorption tower, and a non-adsorbed component for extracting a non-adsorbed component in which a specific component is concentrated In a gas concentrating device equipped with an adsorbed component extraction means and an adsorbed component removal means for removing the adsorbed component in the adsorption tower after taking out the non-adsorbed component, a magnetic substance is dispersed in the adsorption tower together with an adsorbent. It was arranged.
吸着剤としては、たとえば空気から酸素濃縮気体を得
る場合には、窒素の吸着性を大きく示すゼオライト（ア
ルミノシリケート）系吸着剤が用いられる。As the adsorbent, for example, when an oxygen-enriched gas is obtained from air, a zeolite (aluminosilicate) -based adsorbent exhibiting a large nitrogen adsorbability is used.
磁性物質は磁場の影響下の置くことにより磁気を帯び
うる物質であり、この磁性物質よりたとえば酸素が吸引
されることは既に報告されている。この磁性物質として
は、たとえば酸化鉄、四酸化三鉄（マグネタイト）、金
属鉄、鉄含有合金等の鉄および鉄化合物、稀土類−コバ
ルト合金などの物質を挙げることができる。A magnetic substance is a substance which can be magnetized by being placed under the influence of a magnetic field, and it has been already reported that oxygen is absorbed from this magnetic substance. Examples of the magnetic substance include iron oxide, triiron tetroxide (magnetite), iron such as metallic iron and iron-containing alloys, iron compounds, and rare earth-cobalt alloys.
この磁性物質は吸着剤の間に均一に分散していること
が好ましく、また、この吸着剤と磁性物質とを一緒に燃
結したり、バインダを用いて一体化することがより好ま
しい。これにより磁性物質による効果が一層効果的に発
現される。It is preferable that the magnetic substance is uniformly dispersed between the adsorbents, and it is more preferable that the adsorbent and the magnetic substance are burnt together or integrated by using a binder. As a result, the effect of the magnetic substance is more effectively exhibited.
本考案の気体濃縮装置は、吸着塔内の磁性物質に磁界
を作用させる磁界発生手段をさらに備えており、吸着成
分除去手段により吸着塔内の吸着成分を除去して再生を
行う際に、磁性物質に磁界を作用させるものである。The gas concentrator of the present invention is further provided with a magnetic field generating means for applying a magnetic field to the magnetic substance in the adsorption tower, and when the adsorption component removing means removes the adsorption component in the adsorption tower to regenerate the magnetic substance, A magnetic field is applied to a substance.
本考案の気体濃縮装置によれば、磁界により、吸着塔
内の磁性物質の周囲には磁場勾配が形成され、その結果
酸素等の磁化率の高い気体が選択的に吸着される。この
ため、吸着剤の表面からは磁界のない場合に比べて窒素
等の磁化率の低い吸着気体が脱着されやすくなり、吸着
気体の除去を効率的に行うことができる。したがって、
磁化率の高い酸素等の気体を濃縮する場合に用いて好適
となる。According to the gas concentrator of the present invention, a magnetic field forms a magnetic field gradient around the magnetic substance in the adsorption tower, and as a result, a gas having a high magnetic susceptibility such as oxygen is selectively adsorbed. Therefore, the adsorbed gas having a low magnetic susceptibility such as nitrogen is easily desorbed from the surface of the adsorbent as compared with the case where there is no magnetic field, and the adsorbed gas can be efficiently removed. Therefore,
It is suitable for use when concentrating a gas such as oxygen having a high magnetic susceptibility.
さらに、本考案の気体濃縮装置においては、吸着剤を
窒素を優先的に吸着する吸着剤とし、濃縮される気体を
酸素とすることにより、酸素濃縮気体を効率的に得るこ
とができ、特に医療用に用いて好適となる。Further, in the gas concentrator of the present invention, an oxygen-enriched gas can be efficiently obtained by using the adsorbent as an adsorbent that preferentially adsorbs nitrogen and oxygen as the gas to be concentrated. It is suitable for use.
以下、本考案の実施例を図面を参照して具体的に説明
する。Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
第１図は本考案の一実施例に係る圧力スイング式の気
体濃縮装置を示すもである。この気体濃縮装置は、吸着
剤を収容する吸着塔21と、この吸着塔21の外周部に配設
された磁界発生手段としての電磁コイル22を備えてい
る。吸着塔11の底部には圧縮機23によりバッファタンク
24を介して圧縮空気を供給するようになっている。バッ
ファタンク24と吸着塔21の底部との間の流入ライン25に
は開閉バルブ26が設けられている。また、吸着塔21の底
部には流出ライン27が設けられている。流出ライン27に
は開閉弁28が設けられている。吸着塔21の上部には流出
ライン29を介してバッファタンク30に連結され、このバ
ッファタンク30に濃縮気体を収容するようになってい
る。バッファタンク30の流入口側および流出口側にはそ
れぞれ開閉弁31、32が設けられている。FIG. 1 shows a pressure swing type gas concentrator according to an embodiment of the present invention. This gas concentrating device includes an adsorption tower 21 that contains an adsorbent, and an electromagnetic coil 22 as a magnetic field generating means that is arranged on the outer peripheral portion of the adsorption tower 21. A buffer tank is provided at the bottom of the adsorption tower 11 by a compressor 23.
Compressed air is supplied via 24. An open / close valve 26 is provided in an inflow line 25 between the buffer tank 24 and the bottom of the adsorption tower 21. An outflow line 27 is provided at the bottom of the adsorption tower 21. An on-off valve 28 is provided in the outflow line 27. An upper part of the adsorption tower 21 is connected to a buffer tank 30 through an outflow line 29, and the buffer tank 30 stores the concentrated gas. On-off valves 31 and 32 are provided on the inlet side and the outlet side of the buffer tank 30, respectively.
吸着塔21内には、吸着剤33とともに磁性物質34が収容
されている。吸着剤33としては、酸素濃縮気体を得る場
合には酸素より窒素の吸着量を多く示すゼオライト系吸
着剤が用いられる。In the adsorption tower 21, a magnetic substance 34 is housed together with an adsorbent 33. As the adsorbent 33, a zeolite-based adsorbent that exhibits a larger adsorption amount of nitrogen than oxygen when an oxygen-enriched gas is obtained is used.
磁性物質34としてはたとえば酸化鉄（FeO）が用いら
れる。As the magnetic substance 34, iron oxide (FeO) is used, for example.
次に、本実施例の気体濃縮装置により酸素濃縮気体を
得る場合の工程を第２図（ａ）〜（ｃ）を参照して説明
する。なお、この場合には吸着剤としてゼオライト系吸
着剤を用いる。Next, steps for obtaining an oxygen-enriched gas by the gas concentrator of this embodiment will be described with reference to FIGS. 2 (a) to (c). In this case, a zeolite-based adsorbent is used as the adsorbent.
まず、圧力スイングサイクルの吸着期には、開閉弁26
を開成状態、開閉弁28、32をそれぞれ閉成状態とする。
続いて、第２図（ａ）に示すように圧縮機23により流出
ライン25を通じて吸着塔21の底部から圧縮空気を吸着塔
21内に流入させる。圧縮空気が吸着塔21内に流入する
と、その窒素成分が吸着剤33の吸着力により吸着され
る。なお、このとき電磁石22には通電せず、磁性物質34
に対しては磁界をかけない。したがって、吸着塔21から
第２図（ｂ）に示すように流出ライン29を通じて酸素濃
縮気体が流出し、バッファタンク30内に収容される。バ
ッファタンク30内の酸素濃度が基準値に達すると、開閉
弁31を閉成状態とする。First, during the adsorption phase of the pressure swing cycle, the on-off valve 26
Is opened and the on-off valves 28 and 32 are closed.
Then, as shown in FIG. 2A, compressed air is adsorbed from the bottom of the adsorption tower 21 by the compressor 23 through the outflow line 25.
Inflow into 21. When the compressed air flows into the adsorption tower 21, the nitrogen component thereof is adsorbed by the adsorption force of the adsorbent 33. At this time, the electromagnet 22 is not energized, and the magnetic substance 34
No magnetic field is applied to. Therefore, as shown in FIG. 2B, the oxygen-enriched gas flows out from the adsorption tower 21 through the outflow line 29 and is stored in the buffer tank 30. When the oxygen concentration in the buffer tank 30 reaches the reference value, the open / close valve 31 is closed.
吸着塔21を再生を行う場合には、開閉弁26を閉成状態
とし、開閉弁28を開成状態とする。また、同時に電磁石
22に通電し、吸着塔21内の磁性物質34に磁界をかける。
この状態で、第２図（ｃ）に示すように塔頂より塔底方
向に吸着塔21内の洗い流しを行う。このとき磁界により
吸着塔21内の磁性物質34の周囲には磁場勾配が形成さ
れ、その結果磁化率の高い酸素が選択的に吸着される。
このため、吸着剤33の表面からは磁界のない場合に比べ
て窒素が脱着されやすくなり、効率的に洗い流しが行わ
れる。When the adsorption tower 21 is regenerated, the open / close valve 26 is closed and the open / close valve 28 is opened. Also at the same time electromagnet
A current is applied to 22 to apply a magnetic field to the magnetic substance 34 in the adsorption tower 21.
In this state, as shown in FIG. 2 (c), the inside of the adsorption tower 21 is flushed from the tower top toward the tower bottom. At this time, a magnetic field forms a magnetic field gradient around the magnetic substance 34 in the adsorption tower 21, and as a result, oxygen having a high magnetic susceptibility is selectively adsorbed.
Therefore, nitrogen is more easily desorbed from the surface of the adsorbent 33 as compared with the case where there is no magnetic field, and the flushing is efficiently performed.
このように本実施例の気体濃縮装置では、磁化率の高
い酸素濃縮気体を得る場合に、その再生効率が向上す
る。As described above, in the gas concentrating device of the present embodiment, the regeneration efficiency of the oxygen concentrating gas having a high magnetic susceptibility is improved.
なお、上記実施例においては、濃縮対象気体を空気中の
酸素または窒素として説明したが、本考案はこれに限定
するものではなく、その他たとえば各種の化学反応装置
や化学処理装置から取り出された混合気体から酸素また
は窒素を濃縮する場合にも適用できることは勿論であ
る。また、酸素以外のたとえば二酸化窒素、一酸化窒素
などの磁化率の高い気体にも適用可能である。In the above embodiments, the gas to be concentrated was described as oxygen or nitrogen in the air, but the present invention is not limited to this, and for example, a mixture taken out from various chemical reaction devices or chemical treatment devices. Of course, it can be applied to the case of concentrating oxygen or nitrogen from a gas. Further, it is also applicable to gases having a high magnetic susceptibility such as nitrogen dioxide and nitric oxide other than oxygen.
以上説明したように本考案の気体濃縮装置によれば、
吸着塔内に吸着剤とともに磁性物質を分散させて配置
し、さらに磁界発生手段を設け、吸着塔の再生期に磁界
を発生するようにしたので、酸素等の磁化率の高い気体
が選択的に吸引され、窒素等の吸着気体が脱着されやす
くなり、吸着気体の除去を容易に行うことができ、再生
効率が向上する。As described above, according to the gas concentrator of the present invention,
A magnetic substance is dispersed and placed together with an adsorbent in the adsorption tower, and a magnetic field generation means is further provided to generate a magnetic field during the regeneration period of the adsorption tower, so that a gas with a high magnetic susceptibility such as oxygen is selectively The adsorbed gas such as nitrogen is easily desorbed and desorbed, the adsorbed gas can be easily removed, and the regeneration efficiency is improved.
第１図は本考案の一実施例に係る気体濃縮装置の概略構
成を示す図、第２図（ａ）〜（ｃ）はそれぞれ第１図の
気体濃縮装置により酸素濃縮気体を得る場合の動作を説
明するための工程図、第３図（ａ）〜（ｄ）はそれぞれ
従来の気体濃縮装置の圧力スイングサイクルの動作を説
明するための工程図である。 21……吸着塔 22……電磁石 23……圧縮機 24、30……バッファタンク 26、28、31、32……開閉弁 33……吸着剤 34……磁性物質FIG. 1 is a diagram showing a schematic configuration of a gas concentrator according to an embodiment of the present invention, and FIGS. 2 (a) to 2 (c) are operations when obtaining an oxygen concentrated gas by the gas concentrator of FIG. 1, respectively. FIGS. 3 (a) to 3 (d) are process diagrams for explaining the operation of the pressure swing cycle of the conventional gas concentrator, respectively. 21 …… Adsorption tower 22 …… Electromagnet 23 …… Compressor 24,30 …… Buffer tank 26,28,31,32 …… Open / close valve 33 …… Adsorbent 34 …… Magnetic substance
Claims (4)
と、 前記吸着塔から特定成分が濃縮された非吸着成分を取り
出す非吸着成分取出し手段と、 前記非吸着成分を取り出した後に前記吸着塔内の吸着成
分を除去する吸着成分除去手段とを備えた気体濃縮装置
において、 前記吸着塔内に吸着剤とともに磁性物質を分散させて配
置したことを特徴とする気体濃縮装置。1. An adsorption tower for accommodating an adsorbent, a mixed gas supply means for supplying a mixed gas into the adsorption tower, and a non-adsorbed component extraction for extracting a non-adsorbed component in which a specific component is concentrated from the adsorption tower. In the gas concentrating device equipped with a means and an adsorbed component removing means for removing the adsorbed component in the adsorption tower after the non-adsorbed component is taken out, a magnetic substance is placed together with an adsorbent in the adsorbent tower. A gas concentrator, characterized in that
散、配置してなる請求項１記載の気体濃縮装置。2. The gas concentrating device according to claim 1, wherein the magnetic substance and the adsorbent are integrally dispersed and arranged.
着成分を除去する際に、前記吸着塔内の磁性物質に磁界
を作用させる磁界発生手段をさらに備えてなる請求項１
または２に記載の気体濃縮装置。3. A magnetic field generating means for causing a magnetic field to act on a magnetic substance in the adsorption tower when the adsorption component is removed by the adsorption component removing means.
Or the gas concentrator according to 2.
し、濃縮される気体を酸素としてなる請求項３に記載の
気体濃縮装置。4. The gas concentrating device according to claim 3, wherein the adsorbent is an adsorbent that preferentially adsorbs nitrogen, and the gas to be concentrated is oxygen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12486590U JPH084093Y2 (en) | 1990-11-27 | 1990-11-27 | Gas concentrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12486590U JPH084093Y2 (en) | 1990-11-27 | 1990-11-27 | Gas concentrator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0481628U JPH0481628U (en) | 1992-07-16 |
| JPH084093Y2 true JPH084093Y2 (en) | 1996-02-07 |
Family
ID=31872494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12486590U Expired - Lifetime JPH084093Y2 (en) | 1990-11-27 | 1990-11-27 | Gas concentrator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084093Y2 (en) |
-
1990
- 1990-11-27 JP JP12486590U patent/JPH084093Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0481628U (en) | 1992-07-16 |
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