JPH02263705A - Oxygen enriching device - Google Patents
Oxygen enriching deviceInfo
- Publication number
- JPH02263705A JPH02263705A JP1083449A JP8344989A JPH02263705A JP H02263705 A JPH02263705 A JP H02263705A JP 1083449 A JP1083449 A JP 1083449A JP 8344989 A JP8344989 A JP 8344989A JP H02263705 A JPH02263705 A JP H02263705A
- Authority
- JP
- Japan
- Prior art keywords
- oxygen
- enriched air
- pressure
- water
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000001301 oxygen Substances 0.000 title claims abstract description 72
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 72
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000012528 membrane Substances 0.000 claims abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 239000012466 permeate Substances 0.000 claims description 2
- 239000000284 extract Substances 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract description 13
- 230000005494 condensation Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 150000002926 oxygen Chemical class 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 208000024172 Cardiovascular disease Diseases 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002640 oxygen therapy Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0251—Physical processing only by making use of membranes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0043—Impurity removed
- C01B2210/0046—Nitrogen
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Drying Of Gases (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は酸素富化装置、特に酸素富化空気を得るととも
に、それから除湿する機能を有する酸素富化装置に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an oxygen enrichment device, and more particularly to an oxygen enrichment device having the function of obtaining oxygen-enriched air and dehumidifying it.
従来の技術
近年、種々の呼吸器疾患者や循環器疾患者の酸素療法に
用いられている医療用酸素は、深冷分離プラントで液体
酸素を作り、それを高圧ボシベに充填して、末端の医療
現場にまで運ぶという方法で供給されており、医療現場
では高圧ボンベに入れた状態で保存し、必要に応じて使
用使用されている。ところが、液体酸素が充填されてい
る高圧ボンベを診療所や家庭などに持ち込むことは、そ
の保管上の安全性や定期検査、さらには酸素の安全供給
の面で問題がある。そのため、液体酸素に代る小型の酸
素供給装置として、酸素富化装置のニーズが高まりつつ
ある。Conventional technology In recent years, medical oxygen has been used for oxygen therapy for patients with various respiratory and cardiovascular diseases. Liquid oxygen is produced in a cryogenic separation plant and then charged into a high-pressure vessel to be delivered to the end of the body. It is supplied by transporting it to medical sites, where it is stored in high-pressure cylinders and used as needed. However, bringing high-pressure cylinders filled with liquid oxygen into clinics or homes poses problems in terms of safe storage, periodic inspections, and the safe supply of oxygen. Therefore, there is a growing need for oxygen enrichment devices as small-sized oxygen supply devices that can replace liquid oxygen.
従来、このような方法を実現す・るための装置として、
たとえば第２図に示すような構成の膜量の酸素富化装置
が提案されている（特開昭６０−１１８６０４号公報）
。Conventionally, as a device for realizing such a method,
For example, an oxygen enrichment device with a film thickness as shown in Fig. 2 has been proposed (Japanese Patent Application Laid-open No. 118604/1983).
.
以下、この従来の装置について、第２図を用いて説明す
る。This conventional device will be explained below using FIG. 2.
第２図において、１は空気１．２はフィルター３はファ
ンで、フィルター２を通して空気１を選択透過膜モジュ
ール４に供給する。この選択透過膜モジュール４は窒素
より酸素を透過しやすい酸素富化膜を備えているもので
ある。In FIG. 2, 1 is air 1, 2 is a filter 3 is a fan, and air 1 is supplied to the selectively permeable membrane module 4 through the filter 2. This selectively permeable membrane module 4 is equipped with an oxygen-enriched membrane that allows oxygen to permeate more easily than nitrogen.
５は選択透過膜モジュール４によって生産される酸素富
化空気で、後述する種々の処理を受けながら酸素富化空
気取出口６より供給される。７は窒素富化空気で、酸素
富化空気５が生産されるときに副生産物として生産され
、真空ポンプ８や熱交換器９を冷却しながら窒素富化空
気排気口１０から排気される。真空ポンプ８は、選択透
過膜モジュール４の、選択透過膜で区画された酸素富化
空気取出口６側を減圧して、空気１より酸素富化空気５
を得るためのものである。１１は熱交換器９にて冷却さ
れた酸素富化空気で、冷却されたことによって一部凝縮
水を含んでいる。１２は調圧バルブ、１３は断熱膨張に
よって析出した凝縮水を酸素富化空気と分離除去するた
めの水分離器、１４は排水ラインで、１５はその排水口
である。Reference numeral 5 denotes oxygen-enriched air produced by the selectively permeable membrane module 4, which is supplied from the oxygen-enriched air outlet 6 while being subjected to various treatments described below. Nitrogen-enriched air 7 is produced as a by-product when the oxygen-enriched air 5 is produced, and is exhausted from the nitrogen-enriched air exhaust port 10 while cooling the vacuum pump 8 and heat exchanger 9. The vacuum pump 8 depressurizes the oxygen-enriched air outlet 6 side of the selectively permeable membrane module 4, which is partitioned by the selectively permeable membrane, and removes the oxygen-enriched air 5 from the air 1.
It is intended to obtain. 11 is oxygen-enriched air cooled by the heat exchanger 9, and contains a portion of condensed water due to the cooling. 12 is a pressure regulating valve, 13 is a water separator for separating and removing condensed water precipitated by adiabatic expansion from oxygen-enriched air, 14 is a drainage line, and 15 is a drainage port thereof.
１６は排気ラインの高圧側、１７は排気ラインの低圧側
である。16 is the high pressure side of the exhaust line, and 17 is the low pressure side of the exhaust line.
この酸素富化装置の動作について説明すると、空気１が
ファン３によりフィルター２を通って選択透過膜モジュ
ール４に供給され、真空ポンプ８により酸素富化空気５
と窒素富化空気７とに分離される。この酸素富化空気５
は、真空ポンプ８を通過するときに温度の高い真空ポン
プ８との間で熱交換をするため、その温度が上昇する。To explain the operation of this oxygen enrichment device, air 1 is supplied to the selectively permeable membrane module 4 by a fan 3 through a filter 2, and oxygen enriched air 5 is supplied by a vacuum pump 8 to a selectively permeable membrane module 4.
and nitrogen-enriched air 7. This oxygen enriched air 5
When the air passes through the vacuum pump 8, it exchanges heat with the vacuum pump 8, which has a high temperature, so its temperature increases.
そこで、熱交換器９において、はぼ室温の窒素富化空気
７により室温程度まで冷却される。同時に、この酸素富
化空気５について、真空ポンプ８と調圧バルブ１２とに
より排気ラインの高圧側で圧力調整をする。また、調圧
バルブ１２によって酸素富化空気が断熱的に膨張するこ
とによって生じた凝縮水は、水分離器１３により酸素富
化空気から分離され、排水ライン１４を通って、排水口
１５より排出される。Therefore, in the heat exchanger 9, the nitrogen-enriched air 7 is cooled to about room temperature. At the same time, the pressure of this oxygen-enriched air 5 is adjusted on the high-pressure side of the exhaust line using the vacuum pump 8 and the pressure regulating valve 12. Further, condensed water generated by the adiabatic expansion of the oxygen-enriched air by the pressure regulating valve 12 is separated from the oxygen-enriched air by the water separator 13, passes through the drain line 14, and is discharged from the drain port 15. be done.
一方、断熱膨張により除湿された酸素富化空気は、排気
ラインの低圧側１７を通り、酸素富化空気酸素富化空気
取出口６から装置外に供給される。On the other hand, the oxygen-enriched air dehumidified by adiabatic expansion passes through the low-pressure side 17 of the exhaust line and is supplied to the outside of the apparatus from the oxygen-enriched air outlet 6.
発明が解決しようとする課題
しかしながら、上述の構成の装置では、室内空気の湿度
の高くなる梅雨期には、排気ラインの高圧側１６の圧力
をかなり高くしても、装置から供給される酸素濃縮空気
の湿度も上昇して、装置供給口と酸素マスクまたは鼻カ
ニユーラとの間のチューブ中で結露してしまい、その水
滴が患者の口や鼻に入る。また、ラインの高圧側１６の
圧力をあまり高くすると、真空ポンプ８が停止してしま
うおそれがある。Problems to be Solved by the Invention However, in the device configured as described above, even if the pressure on the high pressure side 16 of the exhaust line is considerably increased during the rainy season when indoor air humidity is high, the oxygen concentration supplied from the device is The humidity of the air also increases, causing condensation in the tubing between the device supply and the oxygen mask or nasal cannula, with droplets entering the patient's mouth and nose. Furthermore, if the pressure on the high pressure side 16 of the line is made too high, there is a risk that the vacuum pump 8 will stop.
本発明はかかる課題を解決し、水分が適切な壷金まれて
いる酸素富化空気を使用者に供給できる、酸素富化装置
を提供しようとするものである。The present invention aims to solve this problem and provide an oxygen enrichment device that can supply oxygen enriched air containing an appropriate amount of water to a user.
課題を解決するための手段
この目的を達成するために、本発明の酸素富化装置は、
真空ポンプの排気側に接続されている排気ラインより取
り出される酸素富化空気を、圧力容器内のトラップ内の
水の中を通過させるとともに、この圧力容器内の圧力が
高められるよう加圧手段を備えているものである。Means for Solving the Problems To achieve this object, the oxygen enrichment device of the present invention comprises:
Oxygen-enriched air taken out from an exhaust line connected to the exhaust side of the vacuum pump is passed through water in a trap in the pressure vessel, and a pressurizing means is provided to increase the pressure in the pressure vessel. This is what we have in place.
作 用
この構成によって、室内空気の湿度の高くなる梅雨期で
も、酸素富化酸素富化空気取出口と酸素マスクあるいは
鼻カニユーラ・との間のチニーブの中で結露しな（なる
。This structure prevents condensation from condensing in the chinibu between the oxygen-enriched air intake and the oxygen mask or nasal cannula, even during the rainy season when indoor air humidity is high.
実施例
以下、本発明にかかる酸素富化装置の一実施例について
、第１図を参照して詳細に説明する。なお、本実施例で
、第２図に示した従来の装置の構成要素と同じ機能をも
つ要素には同じ符号を付している。EXAMPLE Hereinafter, an example of the oxygen enrichment device according to the present invention will be described in detail with reference to FIG. In this embodiment, elements having the same functions as those of the conventional apparatus shown in FIG. 2 are given the same reference numerals.
図において、１８は圧力容器トラップで、内部に水１９
が一定量入れられており、水面上の位置には圧力容器ト
ラップ１８の内部圧力を高めるための調圧バルブ２０が
、下部には水１９が真空ポンプ８側へ逆流することを防
止するための逆止弁２１がそれぞれ設けられている。In the figure, 18 is a pressure vessel trap with water 19 inside.
A pressure regulating valve 20 is placed above the water surface to increase the internal pressure of the pressure vessel trap 18, and a pressure regulating valve 20 is placed at the bottom to prevent water 19 from flowing back toward the vacuum pump 8. A check valve 21 is provided respectively.
本実施例において、第１図に示した従来の装置と同様に
して、熱交換器９により室温程度まで冷却された酸素富
化空気１１が得られる。この酸素富化空気１１は、逆止
弁２１から圧力容器（トラップ）１８内に導入され、水
１９中を通りさらに調圧バルブ２０を通って酸素富化空
気取出口６から取り出される。In this embodiment, oxygen-enriched air 11 cooled to about room temperature is obtained by heat exchanger 9 in the same manner as the conventional apparatus shown in FIG. This oxygen-enriched air 11 is introduced into a pressure vessel (trap) 18 through a check valve 21, passes through water 19, passes through a pressure regulating valve 20, and is taken out from an oxygen-enriched air outlet 6.
熱交換器９を通った直後の酸素富化空気１１においては
、相対湿度が１００％以上になっているが、圧力容器１
８内の水１９を通過した後には、その相対湿度は１００
％になっている。つまり、酸素富化空気１１を水１９の
中に通すことにより、それより後の径路内には水滴がた
まらなくなる。The oxygen-enriched air 11 immediately after passing through the heat exchanger 9 has a relative humidity of 100% or more, but the pressure vessel 1
After passing through water 19 in 8, its relative humidity is 100
%It has become. That is, by passing the oxygen-enriched air 11 through the water 19, water droplets will not accumulate in the subsequent path.
しかしながら、相対湿度１００％の酸素富化空気では、
少しの外気温度の変化で酸素富化空気取出口６に結露水
が出るおそれがある。However, in oxygen-enriched air with 100% relative humidity,
There is a possibility that condensed water may come out at the oxygen-enriched air outlet 6 due to a slight change in the outside temperature.
ところが、本実施例では調圧バルブ２０の作用で圧力容
器１８内の圧力が高められ、それによって酸素富化空気
が断熱圧縮されて、酸素富化空気取出口６に結露水が出
なくなる。これは次の理由による。However, in the present embodiment, the pressure within the pressure vessel 18 is increased by the action of the pressure regulating valve 20, whereby the oxygen-enriched air is adiabatically compressed, and no condensed water is produced at the oxygen-enriched air outlet 6. This is due to the following reason.
室温２０℃での飽和水蒸気圧は１９ｍｌ（ｇである。The saturated water vapor pressure at room temperature 20° C. is 19 ml (g).
今、圧力容器１８の酸素富化空気の温度が２０℃である
場合、水蒸気圧は１９＋ｎＩＩ＋Ｈｇである。このとき
、圧力容器１８の内部を調圧バルブ２０で９１０ｍｍＨ
ｇに加圧した場合、酸素富化空気取出口６より取り出さ
れる酸素富化空気の水蒸気圧はこのように、真空ポンプ
８により温められた酸素富化空気を、熱交換器９により
外気温まで冷却した後、水１９の中を通すことによりそ
の相対湿度を１００％とし、さらに調圧バルブ２０によ
り加圧することで、得られる酸素富化空気の相対湿度を
低下させて酸素富化空気取出口６より結露水が出ないよ
うにすることができる。Now, when the temperature of the oxygen-enriched air in the pressure vessel 18 is 20° C., the water vapor pressure is 19+nII+Hg. At this time, the inside of the pressure vessel 18 is adjusted to 910 mmH using the pressure regulating valve 20.
g, the water vapor pressure of the oxygen-enriched air taken out from the oxygen-enriched air outlet 6 is as follows. After cooling, the relative humidity of the oxygen-enriched air is made 100% by passing it through the water 19, and the relative humidity of the obtained oxygen-enriched air is lowered by pressurizing it with the pressure regulating valve 20. 6, it is possible to prevent condensation water from coming out.
なお、本発明では熱交換器９を使用して酸素富化空気を
室温まで低下させているけれども、それに代えて他の冷
却手段を設けたり、経路長を十分に長くしたりしてもよ
い。Although the present invention uses the heat exchanger 9 to lower the oxygen-enriched air to room temperature, other cooling means may be provided instead, or the path length may be made sufficiently long.
また、梅雨期になり外気中の相対湿度が高くなっても、
酸素富化空気を水１９の中を通すことでその相対湿度を
１００％とすることができ、十分に水取りをすることが
できる。Also, even if the relative humidity in the outside air increases during the rainy season,
By passing oxygen-enriched air through the water 19, its relative humidity can be brought to 100%, allowing for sufficient water removal.
ただし、使用する人の好みに応じて湿度を調整できるよ
う、調圧バルブ２０は圧力調整自在とするのが望ま曝い
。また、圧力調整容器１８をカートリッジ式にして、水
を交換できるようにしておいてもよい。However, it is desirable that the pressure regulating valve 20 be able to freely adjust the pressure so that the humidity can be adjusted according to the preference of the user. Further, the pressure regulating container 18 may be of a cartridge type so that the water can be exchanged.
発明の効果
以上のように、本発明の酸素富化装置は、酸素富化空気
が水の中を通る構造であり、しかも水の中を通った後の
酸素富化空気を断熱圧縮させているので、空気の湿度が
高くなる梅雨期でも、酸素富化酸素富化空気取出口と酸
素マスクあるいは鼻カニユーラとの間のチューブ中で結
露を生じるおそれがなくなる。Effects of the Invention As described above, the oxygen enrichment device of the present invention has a structure in which oxygen-enriched air passes through water, and furthermore, the oxygen-enriched air is adiabatically compressed after passing through the water. Therefore, even during the rainy season when air humidity is high, there is no risk of condensation forming in the tube between the oxygen-enriched air outlet and the oxygen mask or nasal cannula.
第１図は本発明の一実施例における酸素富化装置の構成
を示す図、第２図は従来の酸素富化装置の構成の一例を
示す図である。
４・・・・・・選択透過選択透過膜モジュール、８・・
・・・・真空ポンプ、９・・・・・・熱交換器、１８・
・・・・・圧力容器（トラップ）、１９・・・・・・水
、２０・・・・・・調圧バルブ。。
代理人の氏名 弁理士 粟野重孝 ほか１名４−ＩＩゼ
（１ｈ謂じ；−ル
＋ｓ−Ｘ、刀寥、遅、（１＝ラツブノ
ｔｑ・−弓（
２０−−−４周ＦＬバルブFIG. 1 is a diagram showing the configuration of an oxygen enrichment device according to an embodiment of the present invention, and FIG. 2 is a diagram showing an example of the configuration of a conventional oxygen enrichment device. 4...Selective permselective membrane module, 8...
...Vacuum pump, 9...Heat exchanger, 18.
...Pressure vessel (trap), 19 ...Water, 20 ...Pressure regulating valve. . Name of agent: Patent attorney Shigetaka Awano and one other person
Claims (3)
選択透過膜モジュールと、この選択透過膜モジュールの
酸素富化膜を通して酸素富化空気を取り出し、圧送する
真空ポンプと、この真空ポンプの排気側に接続されてい
る排気ラインと、この排気ラインから取り出される酸素
富化空気を内部の水の中を通過させる圧力容器と、この
圧力容器内の圧力を高める加圧手段とを備えていること
を特徴とする酸素富化装置。(1) A selectively permeable membrane module having an oxidation-enriched membrane that allows oxygen to permeate more easily than nitrogen; a vacuum pump that extracts and pumps oxygen-enriched air through the oxygen-enriched membrane of the selectively permeable membrane module; It includes an exhaust line connected to the exhaust side, a pressure vessel that allows oxygen-enriched air taken out from the exhaust line to pass through water therein, and pressurizing means for increasing the pressure inside the pressure vessel. An oxygen enrichment device characterized by:
）記載の酸素富化装置。(2) Claim (1) that the pressure means is adjustable
) described oxygen enrichment device.
却するための冷却手段が設けられていることを特徴とす
る請求項（１）記載の酸素富化装置。(3) The oxygen enrichment device according to claim (1), further comprising a cooling means for cooling the oxygen-enriched air between the vacuum pump and the pressure vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1083449A JPH02263705A (en) | 1989-03-31 | 1989-03-31 | Oxygen enriching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1083449A JPH02263705A (en) | 1989-03-31 | 1989-03-31 | Oxygen enriching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02263705A true JPH02263705A (en) | 1990-10-26 |
Family
ID=13802750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1083449A Pending JPH02263705A (en) | 1989-03-31 | 1989-03-31 | Oxygen enriching device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02263705A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6755898B2 (en) * | 2002-07-26 | 2004-06-29 | Daewoo Electronics Corporation | Oxygen-enriched air supplying apparatus |
| JP2007212083A (en) * | 2006-02-10 | 2007-08-23 | Takao Hara | Cooling device, water forming device and air conditioning system |
-
1989
- 1989-03-31 JP JP1083449A patent/JPH02263705A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6755898B2 (en) * | 2002-07-26 | 2004-06-29 | Daewoo Electronics Corporation | Oxygen-enriched air supplying apparatus |
| JP2007212083A (en) * | 2006-02-10 | 2007-08-23 | Takao Hara | Cooling device, water forming device and air conditioning system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3592191A (en) | Recovery of anesthetic agents | |
| US4174955A (en) | Membrane oxygen enricher apparatus | |
| US4648395A (en) | Synchronized feed type oxygen concentrator for use in an open breathing system | |
| US5924419A (en) | Apparatus for passive hypoxic training and therapy | |
| US4120300A (en) | Breathing apparatus | |
| JP2002085567A (en) | Oxygen condenser, controller and recording medium therefor | |
| JPH02257966A (en) | Aspirator for supplying suction gas to user | |
| JPH02263705A (en) | Oxygen enriching device | |
| JPH02145402A (en) | Oxygen-enriching device | |
| JPS60118604A (en) | Oxygen concentrator | |
| JPH05113227A (en) | Air conditioner with oxygen enriching function | |
| JPS6247371A (en) | Gas purifier and oxygen enriched gas feeder | |
| JP2000037458A (en) | Medical oxygen concentrator | |
| CN111686355A (en) | Face guard with air feed gasbag | |
| US3366109A (en) | Respiration method and apparatus of continuous positive pressure flow of air | |
| JP2001252358A (en) | Method and device for anesthesia using xenon | |
| JPH03293012A (en) | Low-purity oxygen feeder | |
| RU2385742C2 (en) | Intermittent normobaric hyperoxi- and hypoxitherapy apparatus | |
| JPH0626894U (en) | Medical oxygen enriched gas supply device | |
| CN216319311U (en) | Novel breathe internal medicine atomizing system oxygen device | |
| JPS62216904A (en) | Pressure type medical oxygen concentrator | |
| JP3246560U (en) | Portable oxygen respirator | |
| JPH06105873A (en) | Oxygen tent | |
| JP2001000553A (en) | Oxygen thickening device for oxygen therapy | |
| JPS61101405A (en) | Oxygen enricher |