WO2024063041A1 - 酸素濃縮装置 - Google Patents

酸素濃縮装置 Download PDF

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Publication number
WO2024063041A1
WO2024063041A1 PCT/JP2023/033854 JP2023033854W WO2024063041A1 WO 2024063041 A1 WO2024063041 A1 WO 2024063041A1 JP 2023033854 W JP2023033854 W JP 2023033854W WO 2024063041 A1 WO2024063041 A1 WO 2024063041A1
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WO
WIPO (PCT)
Prior art keywords
adsorption
oxygen
product tank
pressure
oxygen concentrator
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.)
Ceased
Application number
PCT/JP2023/033854
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English (en)
French (fr)
Japanese (ja)
Inventor
裕太 森下
佳宏 室重
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Teijin Pharma Ltd
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Teijin Pharma Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Teijin Pharma Ltd filed Critical Teijin Pharma Ltd
Priority to JP2024548247A priority Critical patent/JPWO2024063041A1/ja
Priority to US19/113,018 priority patent/US20260097353A1/en
Priority to EP23868162.1A priority patent/EP4592243A4/en
Priority to KR1020257009394A priority patent/KR20250052439A/ko
Priority to CN202380067583.7A priority patent/CN119968336A/zh
Publication of WO2024063041A1 publication Critical patent/WO2024063041A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • C01B13/0259—Physical processing only by adsorption on solids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
    • A61M16/16—Devices to humidify the respiration air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/047—Pressure swing adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/047—Pressure swing adsorption
    • B01D53/053—Pressure swing adsorption with storage or buffer vessel
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1005—Preparation of respiratory gases or vapours with O2 features or with parameter measurement
    • A61M16/101—Preparation of respiratory gases or vapours with O2 features or with parameter measurement using an oxygen concentrator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/12—Oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/10—Single element gases other than halogens
    • B01D2257/102—Nitrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/06—Polluted air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40007—Controlling pressure or temperature swing adsorption
    • B01D2259/40009—Controlling pressure or temperature swing adsorption using sensors or gas analysers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/45—Gas separation or purification devices adapted for specific applications
    • B01D2259/4533—Gas separation or purification devices adapted for specific applications for medical purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/265—Drying gases or vapours by refrigeration (condensation)

Definitions

  • the present invention relates to a pressure fluctuation adsorption type oxygen concentrator that separates oxygen from air.
  • oxygen inhalation therapy involves having patients with respiratory diseases inhale oxygen gas or oxygen-enriched gas.
  • oxygen concentrators include oxygen concentrators, liquid oxygen, and oxygen gas cylinders, but oxygen concentrators are the mainstream for home oxygen therapy due to their ease of use and maintenance.
  • An oxygen concentrator is a device that separates and concentrates approximately 21% of the oxygen present in the air.
  • membrane type oxygen concentrators using membranes that selectively permeate oxygen and pressure fluctuation adsorption type oxygen concentrators using adsorbents that can preferentially adsorb nitrogen or oxygen are known.
  • pressure fluctuation adsorption type oxygen concentrators are mainly used as devices for home oxygen therapy because they can provide oxygen at a high concentration of 90% or more.
  • a pressure fluctuation adsorption type oxygen concentrator uses a compressor to compress nitrogen into an adsorption cylinder filled with molecular sieve zeolite such as 5A type, 13X type, and Li-X type, which is an adsorbent that selectively adsorbs nitrogen over oxygen.
  • a pressurization/adsorption step in which nitrogen is adsorbed on the adsorbent under pressurized conditions by supplying air to obtain unadsorbed oxygen, and the pressure inside the adsorption column is reduced to atmospheric pressure or lower to remove the adsorbent.
  • Highly concentrated oxygen-enriched gas can be continuously generated by alternately repeating the depressurization and desorption steps in which the adsorbent is regenerated by purging the nitrogen adsorbed by the adsorbent.
  • Oxygen concentrators that use a compressor as a source of pressurized air are equipped with a pressure sensor on the discharge side of the compressor to detect adsorption pressure, and also to detect pressure abnormalities due to compressor abnormalities and issue an alarm. It is equipped with a safety mechanism that reduces or stops the rotation speed. It is also equipped with a relief valve to ensure equipment safety.
  • an oxygen concentrator device that has a function of detecting abnormalities in intake valves and exhaust valves based on the detection result of compressor pressure.
  • the downstream side of the compressor becomes a high humidity environment under pressurized conditions. Therefore, there is a problem that condensation occurs in the tube that connects the pressure sensor, and as a solution, it is necessary to provide a dehumidifying function for the raw air or use an expensive anti-condensation tube for the connecting tube.
  • the downstream side of the adsorption cylinder of the oxygen concentrator is dehumidified by the adsorbent and is in a dry oxygen environment, so by detecting the pressure inside the product tank, such equipment for dehumidification is not required.
  • the pressure in the product tank fluctuates depending on the oxygen generation conditions and the timing of the adsorption/desorption process. It is difficult to detect which component upstream of a product tank is malfunctioning.
  • the oxygen concentrator adjusts the amount of oxygen generated according to the amount of oxygen supplied, the adsorption pressure and product tank pressure associated with the control of the compressor rotation speed will fluctuate greatly even under normal conditions.
  • the present inventor has discovered a method for detecting an abnormal location in an upstream flow path switching valve from the waveform of a pressure sensor provided in a product tank.
  • the present invention provides the following oxygen concentrator. 1. Multiple adsorption cylinders filled with an adsorbent that selectively adsorbs nitrogen over oxygen under pressurized conditions, a compressor that supplies pressurized air to the adsorption cylinder; a flow path switching valve equipped with a supply valve that supplies pressurized air to each adsorption cylinder and an exhaust valve that discharges exhaust gas from the adsorption cylinder to the outside of the system; A product tank that temporarily stores the oxygen generated from the adsorption column, Equipped with a pressure sensor that detects product tank pressure, In a pressure fluctuation adsorption type oxygen concentrator that continuously generates oxygen by sequentially switching and repeating an adsorption process in which each adsorption column generates oxygen under pressure, and a desorption process in which nitrogen is exhausted under reduced pressure, A monitoring means is provided to monitor the state of the flow path switching means based on the output of the pressure sensor, and when the detected value of the pressure sensor in the adsorption step and/or desorption step is out of
  • An oxygen concentrator characterized in that an abnormality in a flow path switching valve is detected when the side deviates from a predetermined range. 2.
  • the above method is characterized in that the monitoring means determines that there is an abnormality in the flow path switching valve when the difference or ratio between the adsorption process or the desorption process of the plurality of adsorption cylinders and the product tank pressure at a specific timing is larger than a predetermined threshold value. 1.
  • the oxygen concentrator according to 1. 3.
  • the product tank pressure at the end of the adsorption process in one adsorption cylinder among the plurality of adsorption cylinders is greater than a predetermined threshold value compared to the product tank pressure at the start of the adsorption process, and the product tank pressure at the end is greater than the product tank pressure at the start of the desorption process.
  • the oxygen concentrator according to item 1 wherein if the tank pressure is higher than a predetermined threshold value, the monitoring means determines that there is an abnormality in the supply valve that supplies pressurized air to the adsorption column. 5.
  • the product tank pressure at the end of the desorption process in one adsorption cylinder among the plurality of adsorption cylinders is smaller than a predetermined threshold value compared to the product tank pressure at the start of the adsorption process, and the product at the end is lower than the product tank pressure at the start of the adsorption process.
  • the oxygen concentrator according to item 1 wherein when the tank pressure is higher than a predetermined threshold value, the monitoring means determines that there is an abnormality in the exhaust valve that discharges the exhaust gas from the adsorption cylinder to the outside of the system. 6.
  • the monitoring means determines that the flow path switching valve is abnormal when the difference or ratio between the maximum pressure and the minimum pressure of the product tank in the adsorption step or desorption step of each adsorption column is larger than a predetermined threshold.
  • oxygen concentrator 8.
  • the predetermined threshold value is a value determined based on a product tank pressure set according to oxygen supply conditions of the oxygen concentrator. 9. 8.
  • the pressure sensor for detecting adsorption pressure can be provided in the product tank that stores dry oxygen-concentrated gas, instead of being provided on the compressor discharge side that contains a large amount of water vapor.
  • abnormalities in equipment upstream of the product tank are detected, and abnormalities in flow path switching valves such as supply valves and exhaust valves are detected based on the relationship between fluctuations in the pressure waveform of the product tank and switching timing of the adsorption/desorption process. be able to.
  • FIG. 1 shows a configuration diagram of an oxygen concentrator of the present invention.
  • Fig. 3 shows fluctuations in product tank pressure of the oxygen concentrator of the present invention.
  • 3 shows fluctuations in product tank pressure when a supply valve abnormality occurs in the oxygen concentrator of the present invention.
  • 3 shows fluctuations in product tank pressure when an exhaust valve abnormality occurs in the oxygen concentrator of the present invention.
  • FIG. 1 is a schematic device configuration diagram illustrating a pressure fluctuation adsorption type oxygen concentrator that is an embodiment of the present invention.
  • the pressure fluctuation adsorption type oxygen concentrator of the present invention includes a compressor 101 that supplies raw air, an adsorption cylinder 102 filled with an adsorbent that selectively adsorbs nitrogen over oxygen, and a flow path switching means that switches between adsorption and desorption processes. It is equipped with a supply valve 103, an exhaust valve 104, and a pressure equalization valve 105, and after adjusting the oxygen enriched gas separated and generated from raw air to a predetermined flow rate with a pressure regulating valve 108 and a control valve 109, which are flow rate setting devices, a water humidifier 110 is provided. After humidification, it is supplied to the user using the cannula 111.
  • Normal air contains about 21% oxygen gas, about 77% nitrogen gas, 0.8% argon gas, and 1.2% carbon dioxide and other gases.
  • a supply valve 103 and an exhaust valve 104 are opened and closed on an adsorption column filled with an adsorbent made of zeolite or the like that selectively adsorbs nitrogen molecules rather than oxygen molecules.
  • pressurized air is sequentially supplied from the compressor 101, and the approximately This is done by selectively adsorbing and removing 77% of nitrogen gas.
  • the adsorption cylinder described above is composed of a cylindrical container filled with an adsorbent that selectively adsorbs nitrogen over oxygen.
  • the number of adsorption cylinders is determined in relation to the amount of oxygen produced, and in order to continuously and efficiently produce oxygen-enriched gas from raw air, a two-cylinder or multi-cylinder adsorption cylinder as shown in Figure 1 is used. It is preferable to do so.
  • the oxygen-enriched gas which is mainly composed of oxygen that has not been adsorbed in the adsorption cylinder, flows into the product tank 107 through a check valve 106 provided to prevent it from flowing back into the adsorption cylinder, and is temporarily stored therein.
  • the supply valve is closed and the exhaust valve is opened to connect the adsorption cylinder to the exhaust line, switch the pressurized adsorption cylinder to the atmosphere, and desorb the nitrogen that was adsorbed under pressure. Regenerate the adsorbent.
  • the operation of the two adsorption cylinders is controlled by shifting each process, so that when one adsorption cylinder is performing the adsorption process and generating oxygen, the other adsorption cylinder performs the desorption process to regenerate the adsorbent. Oxygen is continuously generated by switching each process.
  • Compressor 101 supplies pressurized air to adsorption tube 102(a) via supply valve 103(a), and the adsorption process in which nitrogen is adsorbed to generate oxygen is repeated alternately.
  • the other adsorption tube 102(b) is depressurized to desorb the adsorbed nitrogen, and the adsorption process is exhausted to the outside of the system via exhaust valve 104(b). By repeating these processes alternately, unadsorbed oxygen is continuously generated.
  • the adsorption and desorption processes are repeated while incorporating a pressure equalization process in which the pressure between the adsorption tubes is equalized via a pressure equalization valve, and a purging process in which oxygen is generated while flowing some of it to the other adsorption tube to increase regeneration efficiency, thereby generating oxygen-enriched gas.
  • Oxygen-enriched gas is produced from raw air and temporarily stored in the product tank.
  • the oxygen enriched gas stored in this product tank contains a high concentration of oxygen enriched gas, for example 95%, and its supply flow rate and pressure are controlled by flow rate setting devices such as pressure regulating valves and control valves and sent to the humidifier.
  • the supplied and humidified oxygen enriched gas is delivered to the patient.
  • a humidifier a bubbling type humidifier or a surface evaporation type humidifier using water as a humidification source can be used.
  • the flow rate and oxygen concentration of the oxygen-enriched gas supplied to the user are detected by an ultrasonic oxygen concentration/flow sensor, and the compressor speed and the opening and closing time of the flow path switching valve are feedback-controlled based on the oxygen concentration detection value and oxygen supply flow rate value, making it possible to control oxygen generation.
  • Molecular sieve zeolite such as Na-X type, Li-X type, and MD-X type, is used as an adsorbent filled in the adsorption column to selectively adsorb nitrogen over oxygen. Since the water is also adsorbed, the oxygen-enriched gas produced is separated as an almost completely dry gas.
  • humidifying water is placed in the middle of the piping connecting the product tank that primarily stores the generated oxygen-enriched gas and the cannula that supplies oxygen to the patient.
  • a water humidifier that humidifies oxygen-enriched gas by bubbling or a non-water humidifier using a hollow fiber membrane that selectively permeates water vapor in the air can be installed as necessary.
  • FIG. 2 shows the pressure waveform of the pressure sensor 112 installed in the product tank 107.
  • the compressor pressure which is the adsorption pressure
  • the sequence of the adsorption/desorption process are controlled so that the amount of oxygen generated and the amount of oxygen supplied are constant.
  • a slight drop in product tank pressure was observed during the pressure equalization process when switching between adsorption and desorption processes. Although the steady pressure varies depending on the supply flow rate, the product tank pressure is maintained at a substantially constant value.
  • Figure 3 shows the pressure waveform in the product tank when an abnormality occurs in the supply valves and one of the supply valves does not open.
  • the solenoid valves used for supply valves, exhaust valves, etc. are open when the power is turned on and closed when the power is turned off, in order to close the supply path to the adsorption cylinder when the system is stopped and prevent moisture absorption and deterioration of the adsorbent. This often results in an abnormality in which the solenoid valve does not open even when voltage is applied, but the opposite may also occur.
  • Figure 4 shows the pressure waveform in the product tank when an abnormality occurs in the exhaust valve and one exhaust valve remains closed. If an exhaust valve malfunctions and is permanently closed, it becomes impossible to exhaust desorbed nitrogen and barge gas during the desorption process of the corresponding adsorption cylinder. Of the oxygen gas generated in the adsorption process in the adsorption cylinder on the opposite side, a large amount of the oxygen gas is generated to be purged and exhausted, so the product tank pressure gradually increases.
  • the pressure fluctuation adsorption type oxygen concentrator of the present invention includes a monitoring means for monitoring the state of the flow path switching means based on the output of the pressure sensor of the product tank, and includes an adsorption process and/or a desorption process that involves switching the flow path switching means.
  • a monitoring means for monitoring the state of the flow path switching means based on the output of the pressure sensor of the product tank, and includes an adsorption process and/or a desorption process that involves switching the flow path switching means.
  • This predetermined threshold value is a value determined based on the product tank pressure set according to the oxygen supply conditions of the oxygen concentrator, such as the set flow rate, supply mode such as continuous supply or breathing synchronized supply, and the accompanying compressor rotation speed. be.
  • the adsorption process of multiple adsorption cylinders that is, the product tank pressure at a specific timing of the adsorption process of adsorption cylinder (a) and the product tank pressure at the same timing of the subsequent adsorption process of adsorption cylinder (b) should normally be the same pressure.
  • the monitoring means determines that the flow path switching valve is abnormal. It is preferable that such specific timing is set at a predetermined time before the end of the adsorption step or desorption step, such as 10 seconds or 5 seconds before the end, when the value of the product tank pressure becomes stable.
  • the monitoring means can determine that the flow path switching valve is abnormal.
  • the monitoring means of the flow path switching means monitors the adsorption/desorption process sequence and the product tank pressure, and as shown in the product tank pressure waveform of FIG.
  • the product tank pressure (3f) at the end of the adsorption process is greater than the predetermined threshold (differential pressure between 3b and 3c) with respect to the product tank pressure (3e) at the start of the adsorption process, and the product tank pressure (3d) at the start of the desorption process is If the product tank pressure (3e) at the end of the process is greater than a predetermined threshold, the monitoring means can determine that there is an abnormality in the supply valve 103(a) that supplies pressurized air to the adsorption cylinder 102(a).
  • the monitoring means can determine that there is an abnormality in the exhaust valve 104(a), which releases exhaust gas from the adsorption tube to the outside of the system.
  • the oxygen concentrator of the present invention can be used as a safe medical device for home oxygen inhalation therapy, which supplies oxygen to patients with chronic respiratory diseases.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Emergency Medicine (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hematology (AREA)
  • Veterinary Medicine (AREA)
  • Pulmonology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation Of Gases By Adsorption (AREA)
PCT/JP2023/033854 2022-09-22 2023-09-19 酸素濃縮装置 Ceased WO2024063041A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2024548247A JPWO2024063041A1 (https=) 2022-09-22 2023-09-19
US19/113,018 US20260097353A1 (en) 2022-09-22 2023-09-19 Oxygen concentrator
EP23868162.1A EP4592243A4 (en) 2022-09-22 2023-09-19 OXYGEN CONCENTRATION DEVICE
KR1020257009394A KR20250052439A (ko) 2022-09-22 2023-09-19 산소 농축 장치
CN202380067583.7A CN119968336A (zh) 2022-09-22 2023-09-19 氧浓缩装置

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Application Number Priority Date Filing Date Title
JP2022150827 2022-09-22
JP2022-150827 2022-09-22

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WO2024063041A1 true WO2024063041A1 (ja) 2024-03-28

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EP (1) EP4592243A4 (https=)
JP (1) JPWO2024063041A1 (https=)
KR (1) KR20250052439A (https=)
CN (1) CN119968336A (https=)
WO (1) WO2024063041A1 (https=)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6487502A (en) * 1987-09-30 1989-03-31 Teijin Ltd Oxygen concentrating apparatus
JP2005046254A (ja) * 2003-07-31 2005-02-24 Fukuda Denshi Co Ltd 酸素濃縮器
JP2007190314A (ja) * 2006-01-23 2007-08-02 Teijin Pharma Ltd 医療用酸素濃縮装置
JP2018175542A (ja) * 2017-04-17 2018-11-15 日本特殊陶業株式会社 酸素濃縮器
WO2022015907A1 (en) * 2020-07-16 2022-01-20 Invacare Corporation System and method for concentrating gas

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7708802B1 (en) * 2005-05-23 2010-05-04 Inogen, Inc. Gas fractionalization apparatus with built-in administrative and self-diagnostic functions

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6487502A (en) * 1987-09-30 1989-03-31 Teijin Ltd Oxygen concentrating apparatus
JP2005046254A (ja) * 2003-07-31 2005-02-24 Fukuda Denshi Co Ltd 酸素濃縮器
JP2007190314A (ja) * 2006-01-23 2007-08-02 Teijin Pharma Ltd 医療用酸素濃縮装置
JP2018175542A (ja) * 2017-04-17 2018-11-15 日本特殊陶業株式会社 酸素濃縮器
WO2022015907A1 (en) * 2020-07-16 2022-01-20 Invacare Corporation System and method for concentrating gas

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4592243A4 *

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EP4592243A4 (en) 2026-03-04
KR20250052439A (ko) 2025-04-18
EP4592243A1 (en) 2025-07-30
US20260097353A1 (en) 2026-04-09
CN119968336A (zh) 2025-05-09
JPWO2024063041A1 (https=) 2024-03-28

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