WO2024105107A1 - Système de fourniture d'oxygène et procédé - Google Patents

Système de fourniture d'oxygène et procédé Download PDF

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Publication number
WO2024105107A1
WO2024105107A1 PCT/EP2023/081917 EP2023081917W WO2024105107A1 WO 2024105107 A1 WO2024105107 A1 WO 2024105107A1 EP 2023081917 W EP2023081917 W EP 2023081917W WO 2024105107 A1 WO2024105107 A1 WO 2024105107A1
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WO
WIPO (PCT)
Prior art keywords
oxygen
oxygen gas
supply system
generating device
gas
Prior art date
Application number
PCT/EP2023/081917
Other languages
German (de)
English (en)
Inventor
Harun Özkalp
Original Assignee
Oezkalp Harun
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
Priority claimed from EP22211367.2A external-priority patent/EP4371648A1/fr
Application filed by Oezkalp Harun filed Critical Oezkalp Harun
Publication of WO2024105107A1 publication Critical patent/WO2024105107A1/fr

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    • 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
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    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0051—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes with alarm devices
    • A—HUMAN NECESSITIES
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    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
    • A61M16/022—Control means therefor
    • A61M16/024—Control means therefor including calculation means, e.g. using a processor
    • A—HUMAN NECESSITIES
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    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; 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
    • 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
    • A—HUMAN NECESSITIES
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    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/01—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes specially adapted for anaesthetising
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    • A61M16/0666—Nasal cannulas or tubing
    • A61M16/0672—Nasal cannula assemblies for oxygen therapy
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    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
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    • A61M16/104—Preparation of respiratory gases or vapours specially adapted for anaesthetics
    • A—HUMAN NECESSITIES
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    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/105—Filters
    • A61M16/106—Filters in a path
    • A61M16/107—Filters in a path in the inspiratory path
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    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
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    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
    • A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/16—General characteristics of the apparatus with back-up system in case of failure
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3379—Masses, volumes, levels of fluids in reservoirs, flow rates
    • A61M2205/3389—Continuous level detection
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/35—Communication
    • A61M2205/3576—Communication with non implanted data transmission devices, e.g. using external transmitter or receiver
    • A61M2205/3592—Communication with non implanted data transmission devices, e.g. using external transmitter or receiver using telemetric means, e.g. radio or optical transmission
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/36—General characteristics of the apparatus related to heating or cooling
    • A61M2205/3606—General characteristics of the apparatus related to heating or cooling cooled
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/36—General characteristics of the apparatus related to heating or cooling
    • A61M2205/362—General characteristics of the apparatus related to heating or cooling by gas flow
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
    • A61M2205/581—Means for facilitating use, e.g. by people with impaired vision by audible feedback
    • A—HUMAN NECESSITIES
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    • A61M2205/00—General characteristics of the apparatus
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    • A—HUMAN NECESSITIES
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    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/75—General characteristics of the apparatus with filters
    • A61M2205/7536—General characteristics of the apparatus with filters allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/82—Internal energy supply devices
    • A61M2205/8206—Internal energy supply devices battery-operated
    • A—HUMAN NECESSITIES
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    • A61M2209/00—Ancillary equipment
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    • A61M2209/045—Tools for specific apparatus for filling, e.g. for filling reservoirs
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    • A61M2209/00—Ancillary equipment
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    • 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
    • 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
    • B01D2259/00—Type of treatment
    • B01D2259/45—Gas separation or purification devices adapted for specific applications
    • B01D2259/4541—Gas separation or purification devices adapted for specific applications for portable use, e.g. gas masks

Definitions

  • the present invention relates to an oxygen supply system with a portable oxygen gas generating device with which an oxygen gas, i.e. a gas with an increased oxygen content compared to the ambient air, can be provided, in particular for medical use. Furthermore, the invention relates to a method for providing oxygen gas.
  • an oxygen gas i.e. a gas with an increased oxygen content compared to the ambient air
  • Oxygen bottles can be used to provide oxygen gas on a mobile basis.
  • portable devices are also known for supplying individual patients, which generate the oxygen gas using pressure swing adsorption. Such devices are designed in particular to increase or improve the freedom of movement of individual patients.
  • DE 36 27 203 CI discloses a device comprising an oxygen enrichment and distribution system with a pressure swing adsorber for supplying a group of people in a shelter.
  • the present invention is based on the object of providing a technology with which the mobile provision of gas with a high oxygen content is facilitated in a particularly reliable manner even under difficult conditions, such as those that may arise due to a lack of infrastructure in remote areas (e.g. in Africa or Australia (outback)) or in the case of destroyed or severely damaged infrastructure after natural disasters or other accidents.
  • An oxygen supply system is transportable, i.e. designed for repeated transport and use at different locations.
  • the oxygen supply system comprises an oxygen gas generating device with at least one compressor which is designed to compress ambient air, in particular preferably to a pressure which is at least 1 bar, at least 1.5 bar or at least 2.4 bar above a respectively prevailing ambient pressure.
  • the oxygen gas generating device further comprises at least one adsorber device.
  • This is designed to generate a gas from the ambient air compressed by the compressor using pressure swing adsorption, which gas has a higher oxygen content than the ambient air; in the following, such a gas is also referred to as "oxygen gas".
  • the at least one adsorber device is therefore an oxygen concentrator. In the case of several adsorber devices, these can be operated individually (one after the other) and/or synchronously (i.e. in parallel), preferably at the user's discretion.
  • the at least one adsorber device can preferably be designed to generate oxygen gas which consists of at least 75 vol.%, at least 80 vol.% or even at least 90 vol.% oxygen.
  • the oxygen supply system further comprises at least one compressor for compressing the generated (oxygen) gas and at least one storage device which is designed to receive the compressed generated oxygen gas.
  • the generated gas can be discharged from the at least one storage device via at least one outlet of the oxygen gas generating device.
  • the oxygen gas generating device is preferably designed to discharge the generated gas at the outlet or at least one of the several outlets, while at the same time (by the at least one adsorber device) the pressure swing adsorption and thus gas generation is continued.
  • the oxygen supply system according to the invention thus represents a unit with which oxygen gas can be generated and provided from ambient air, in particular for medical but also for industrial use. It is preferably electrically operated. With an appropriate power supply (such as a power generator or a battery), which can be part of the oxygen supply system, it forms a self-sufficient device for supplying oxygen, which can therefore be used advantageously in particular in emergencies under the extreme conditions mentioned above.
  • the oxygen supply system according to the invention provides a mobile technology that reliably enables high-quality medical emergency oxygen care for patients even in impassable areas and in cases where the respective infrastructure makes it difficult or even impossible to transport liquid oxygen in O 2 cylinders, as is conventionally intended for emergencies.
  • the at least one storage device enables buffering of any power fluctuations or even power outages.
  • the upstream compression of the oxygen gas generated allows, on the one hand, a volume-saving design of the at least one storage device, which facilitates the transport of the oxygen supply system, and, on the other hand, it can ensure that the oxygen gas generated is released from the outlet or from at least one of the outlets at a pressure that is higher than the ambient pressure.
  • the at least one compressor is designed to compress the generated gas to a pressure of at least 1.5 bar, at least 2 bar, at least 2.5 bar, at least 5 bar, at least 5.5 bar, at least 6 bar or even at least 6.5 bar.
  • the oxygen gas generating device is preferably designed to deliver the generated gas at the outlet or at least at one of the (possibly existing) several outlets at a constant pressure, in particular at a (device-determined) maximum pressure.
  • the maximum pressure can preferably be at least 1.5 bar, at least 2 bar, at least 2.5 bar, at least 5 bar, at least 5.5 bar, at least 6 bar or even at least 6.5 bar. This can cover a correspondingly high demand for oxygen gas, in particular, for example, in medical emergencies when a number of patients can be cared for at the same time.
  • the outlet/at least one of the outlets comprises a pressure regulator for setting a respective delivery pressure of the generated gas (up to the maximum pressure).
  • a user of the oxygen supply system can adapt the respective pressure to a current situation, in the case of medical application, for example to a number of patients to be treated.
  • the outlet/at least one of the outlets of the oxygen gas generating device of an oxygen supply system according to the invention can preferably be connected via a respective screw, snap and/or medical standard connection to at least one medical device such as in particular a life-saving/life-sustaining anesthesia device or one or more (identical or different) medical devices for supporting or non-life-sustaining patient care with oxygen (e.g. ventilation mask(s), in particular to several identical or different medical devices at the same time.
  • the oxygen gas generation device can comprise a filling system for oxygen cylinders and/or can be connected to such a filling system via a respective screw, snap and/or medical standard connection.
  • the oxygen supply system can thus also be used to store oxygen at the user's discretion and/or make it possible to bridge larger spatial distances.
  • the at least one adsorber device - with respect to an orientation intended for use of the oxygen gas generating device - has at least one exhaust air outlet on its upper side; such an exhaust air outlet can, for example, in particular comprise a (respective) molecular sieve.
  • the adsorber device is preferably connected in an airtight manner (preferably detachably) to a cap which couples over the at least one exhaust air outlet.
  • the cap can, for example, be connected to the top of the adsorber device in a form-fitting and/or force-fitting manner, in particular screwed on.
  • a radial seal can be enclosed between the adsorber device and the cap to seal off air.
  • the cap thus encloses a space with at least part of the top into which exhaust air can flow from the at least one exhaust air outlet.
  • the cap has an opening with a moisture barrier through which the exhaust air can exit the space, but which prevents moisture (in particular moist ambient air from above the adsorber device) from penetrating.
  • the moisture barrier can, for example, comprise a moisture sieve and/or a backflow preventer, in particular a check valve.
  • the opening in the cap is arranged on the front side, in particular (with respect to the stated orientation of use) above the at least one exhaust air outlet. In this way, a particularly advantageous exhaust air duct can be realized, which can be used in particular for cooling, for example to device electronics arranged above the adsorber device, as described further below.
  • the at least one adsorber device of the oxygen gas generation device is designed as a multi-chamber adsorber device, which therefore has a plurality of adsorber chambers each containing at least one adsorbent (in particular at least one zeolite).
  • the adsorber chambers can be cylindrical or prism-shaped, for example.
  • the plurality can be at least 12 or at least 18, for example.
  • the number, size and/or shape of the adsorber chambers and/or the adsorbent contained in each one is/are preferably selected such that at a temperature of 25 °C, a relative humidity of 60% and an ambient pressure of 1.013 bar, at least 1 liter of gas can be generated from at least 12 liters of sucked-in air using the oxygen gas generation device.
  • the multi-chamber adsorber device(s) has/have a closing device which is designed to successively open respective inlets of the plurality of adsorber chambers for pressurization/filling with compressed ambient air and to open or close respective outlets of the adsorber chambers depending on a respective adsorbent saturation.
  • a closing device can comprise a stepper motor.
  • the closing device can be designed to open a respective outlet for the oxygen gas (as a light gas) for two (alternating) thirds of the adsorber chambers, while at the same time an outlet for the residual gas (as a heavy gas or exhaust air) is opened for the respective third third of the adsorber chambers.
  • the cap can preferably also couple over the closing device.
  • It preferably has at least one airtight passage for a power supply line through which the locking device is to be operated.
  • connection the cap with the at least one adsorber device must be designed with such an airtight passage.
  • the oxygen gas generating device has an exhaust air duct for exhaust air generated during pressure swing adsorption.
  • the exhaust air duct directs the exhaust air into an interior of the oxygen gas generating device and/or to at least one device electronics of the oxygen gas generating device, in particular it can be designed in such a way that such device electronics are at least partially washed around by the exhaust air.
  • the exhaust air can be used for cooling, so that further cooling devices are dispensable or can be made smaller.
  • the exhaust air duct can in particular comprise a pipe at least in some areas and/or be formed at least in some areas by at least one intermediate space in the oxygen gas generating device, for example between at least one housing section of the oxygen gas generating device and at least one component (such as in particular the at least one adsorber device or at least one compressor of the oxygen gas generating device).
  • the device electronics can be arranged, for example, above the at least one adsorber device, in particular in a (preferably hinged) housing cover of the oxygen gas generating device.
  • An exhaust air duct can thus be implemented that directs exhaust air exiting from an upper outlet of the at least one adsorber device directly to the device electronics.
  • the device electronics can, for example, form at least part of a computer unit (in particular the computer unit described below), for example for controlling, regulating and/or monitoring the at least one adsorber device and/or the compressor and/or an input and/or output device possibly included in the oxygen gas generation device.
  • a computer unit in particular the computer unit described below
  • the device electronics can, for example, form at least part of a computer unit (in particular the computer unit described below), for example for controlling, regulating and/or monitoring the at least one adsorber device and/or the compressor and/or an input and/or output device possibly included in the oxygen gas generation device.
  • the exhaust air duct can comprise at least one fan for discharging the exhaust air from the interior of the device into an environment of the oxygen gas generating device. This allows an exhaust air flow to be extended or accelerated, which results in particularly efficient cooling.
  • the at least one storage device comprises a pipe coil for receiving the generated gas.
  • the pipe coil can in particular be a pipe coil arranged in a plane running turn and/or at least one three-dimensional winding (for example along a helix). In this way, a compact form of the storage unit and at the same time a relatively high volume for gas absorption can be achieved.
  • the pipe coil can be made at least partially of copper.
  • the pipe coil is arranged within an insulation of the storage tank. This can prevent or at least reduce the formation of condensate, which is problematic in relation to the dew point, also in view of the cooling of the ambient air that accompanies compression.
  • At least one inlet of the oxygen gas generating device comprises an intake port. This allows a particularly advantageous air flow to be generated to the at least one adsorber device or - in corresponding embodiments - to the at least one compressor.
  • the at least one inlet for the ambient air can comprise at least one HEPA filter and/or at least one ABC filter. This can prevent the gas generated from containing toxic substances in particularly problematic environments.
  • the oxygen gas generating device can preferably have a housing, which can in particular comprise a hinged housing cover (as mentioned above). In this way, the various components of the oxygen gas generating device can be protected on the one hand, but on the other hand remain accessible, for example for repairs.
  • the housing can preferably consist partially or completely of a light metal such as aluminum and/or one or more light metal alloys such as aluminum alloys.
  • the oxygen gas generating device has at least one input and/or output means, such as at least one rotary knob, at least one switch and/or at least one - preferably touch-sensitive - display field (in particular a screen) for displaying and/or adjusting at least one operating parameter and/or a function of the oxygen gas generating device.
  • a display field can in particular be darkened in such a way that a night vision device is required to recognize the information displayed. This can prevent the oxygen supply system and thus its user from being undesirably noticed, for example when used in a military context.
  • the oxygen gas generating device comprises at least one computer unit.
  • the computer unit can comprise a wireless and/or wired connection port for one-way or two-way communication with an external computer unit (which then preferably has corresponding input and/or output means).
  • an external computer unit which then preferably has corresponding input and/or output means.
  • the computer unit can serve, for example, to control, regulate and/or monitor at least one component of the oxygen gas generation device, for example the at least one adsorber device and/or the compressor.
  • the oxygen gas generating device comprises at least one control unit for monitoring at least one function of the oxygen gas generating device and/or for measuring an oxygen content and/or CO measurement in the generated gas during its continued generation (or multiplication) and/or during its release.
  • a control unit can in particular comprise at least one sensor.
  • the sensor(s) can be connected to a computer unit (in particular the above-mentioned computer unit), which can be set up to evaluate and/or output recorded parameters and/or to transmit them to an external unit.
  • the oxygen gas generating device has a designated footprint with dimensions of at most 1000mm*700mm, more preferably at most 900mm*600mm.
  • a height of the oxygen gas generating device in its intended orientation for use and in a state intended for use, in the above-mentioned embodiments with a hinged lid, in particular in the closed state) can preferably be at most 900mm, more preferably at most 800mm.
  • Such design variants form particularly compact oxygen gas generating devices, which can therefore be easily transported using simple means and which can also be used in confined conditions.
  • the oxygen supply system also comprises a reserve supply unit with a housing that is separate from the oxygen gas generating device, in particular a separate housing, and a gas inlet that is or can be detachably connected (via a gas line) to the at least one outlet of the oxygen gas generating device.
  • the reserve supply unit can thus receive oxygen gas generated by the oxygen gas generating device via its gas inlet.
  • the reserve supply unit has at least one gas outlet to which at least one output device can be connected.
  • the reserve supply unit can preferably comprise at least one such gas outlet standardized according to DIN and/or at least one according to NIST.
  • the oxygen gas supply system is designed to output oxygen gas, which was taken up by the reserve supply unit via the gas inlet, i.e. generated by the oxygen gas generating device, at at least the gas outlet of the reserve supply unit on the one hand (in a first operating mode), and on the other hand (alternatively or additionally, in particular simultaneously or thereafter, or in a second operating mode of the reserve supply unit) to output oxygen gas which comes from at least one oxygen cylinder arranged or to be arranged in or on the housing of the reserve supply unit.
  • the oxygen gas generating device can have only one outlet for discharging the oxygen gas (from the at least one storage device), which is designed to be connected to the reserve supply unit.
  • the separate design of the oxygen gas generating device on the one hand and the reserve supply unit on the other hand allows these two devices to be arranged in different rooms.
  • the low-noise reserve supply unit can be arranged in a hospital room, while the louder oxygen gas generating device that at least partially supplies it is housed in another room. In this way, a low level of noise pollution can be achieved.
  • the at least one oxygen bottle serves in particular as a fail-safe for the oxygen gas generating device.
  • even several (preferably two) oxygen bottles are arranged or to be arranged on or in the housing of the reserve supply unit and the The oxygen gas supply system is also designed to sequentially or simultaneously deliver oxygen gas from the plurality of oxygen cylinders to at least one gas outlet of the reserve supply unit.
  • the oxygen gas supply system can preferably be designed to automatically switch from the first operating mode of the reserve supply unit, in which oxygen gas generated by the oxygen gas generating device taken in via the gas inlet is output at at least one gas outlet, to the second operating mode, in which (as a substitute or supplementary measure) oxygen gas from the at least one oxygen cylinder is output at at least one gas outlet.
  • the oxygen gas supply system can preferably be designed in the second operating mode of the reserve supply unit to dispense oxygen gas from a first of the oxygen cylinders and to automatically switch to a third operating mode in which (as a substitute or supplementary measure) oxygen gas is supplied from a second of the oxygen cylinders, different from the first.
  • the oxygen supply system can be set up to carry out the switching based on a supply capacity of oxygen gas by the oxygen gas generating device or (in the case of several oxygen bottles) by the first of the oxygen bottles, in particular by means of a control unit that can be included in the reserve supply unit.
  • the reserve supply unit can, for example, include at least one flow sensor and/or a pressure gauge for detecting a volume flow or a pressure of the oxygen gas taken in by the oxygen gas generating device via the gas inlet, and the switching can then be based on their respective detected, current values.
  • the oxygen gas generating device can be set up to transmit data on the current volume flow or pressure occurring at the outlet of the oxygen gas generating device to the reserve supply unit, for example via an establishable (wireless or wired) data connection.
  • the switching mentioned can then take place based on the respective values.
  • the switching can be carried out by means of a control unit, which can be included in the reserve supply unit. Alternatively or additionally, the switching can be carried out by means of a computer unit of the oxygen gas generation device, for example a Computer unit as described above.
  • the reserve supply unit is then preferably connected or to be connected to the oxygen gas generation device or its computer unit by means of a (wireless or wired) control line.
  • the reserve supply unit is preferably portable, i.e. designed for transport and use in different locations. In particular, it is preferably transportable separately from the oxygen gas generation device.
  • its housing In an orientation intended for its use, its housing preferably has a base area which lies within a rectangle of at most 50cm * 50cm or even at most 35cm * 45cm.
  • a height of the housing in said orientation is preferably at most 50cm or at most 40cm.
  • the reserve supply unit preferably has a power connection for connection to the oxygen gas generation device.
  • it is preferably suitable for being operated with electrical energy obtained via such a power connection.
  • the reserve supply unit comprises an alarm monitor.
  • Such an alarm monitor can preferably be optionally mounted or removed.
  • the reserve supply unit is preferably designed to be operated optionally with or without the alarm monitor.
  • the alarm monitor can preferably be used to display at least one functional parameter of the oxygen gas generating device, at least one operating parameter of the reserve supply unit, at least one alarm condition, a gas flow through the gas inlet and/or through the at least one gas outlet and/or at least one property of the oxygen gas generated or emitted (for example a current pressure and/or a current oxygen content) and/or to issue a visual and/or acoustic alarm if predetermined limits for the above-mentioned values are exceeded or not reached.
  • the alarm monitor is preferably connected to at least one corresponding sensor.
  • the alarm monitor thus serves to reliably automatically monitor the reserve supply unit and thus the provision of oxygen gas by the oxygen supply system as a whole.
  • the reserve supply unit preferably has at least one connection point as a gas outlet, which is designed to be connected to a life-saving/life-sustaining medical device, for example in the form of an anesthesia machine or an active ventilation device (which can each be included in the oxygen supply system).
  • the reserve supply unit can comprise at least one extraction point as a gas outlet for connecting one or more supporting ventilation devices, each of which can be composed of several components such as a flow meter with a connected ventilation mask and/or nasal cannula (and/or which can each be included in the oxygen supply system).
  • an extraction point can be designed, for example, as a plug arrangement, in particular a plug strip, which comprises several slots (preferably each standardized according to DIN or NIST) for connecting a respective supporting ventilation device.
  • the flow meter serves, in appropriate embodiments, as it were, as an external flow regulator. This makes it possible to individually dose the oxygen gas for the patients supplied with the oxygen supply system.
  • At least one filter module for filtering out impurities (such as particles, moisture, viruses, bacteria, fungal spores and/or oil residues) from the oxygen gas to be emitted can preferably be arranged on at least one outlet of the oxygen gas generation device and/or - in embodiments with a reserve supply unit - on its at least one gas outlet.
  • no functional component of the oxygen supply system is interposed between the filter mode and the respective outlet or gas outlet (following an intended flow direction of the oxygen gas). In this way, biocompatibility of the gas paths (i.e. of the entire pneumatic circuit in the system), as required by standards and in the pharmacopoeia, can be ensured while avoiding control of individual components.
  • an oxygen supply system comprises a transport box in which the oxygen gas generating device is arranged or can be arranged, which in particular forms a receiving space for at least part of the oxygen gas generating device.
  • the oxygen gas generating device When the oxygen gas generating device is arranged in the receiving space, the oxygen gas generating device preferably rests on opposite sides on a respective wall of the transport box. In this way, the risk of the oxygen gas generating device slipping within the receiving space and thus of damage to the oxygen gas generating device during transport can be reduced.
  • the transport box can in particular comprise a lower part and a removable and/or foldable lid.
  • the lid can then preferably be fixed to the lower part.
  • the transport box is preferably airtight and/or sand-tight and/or splash-proof or even watertight.
  • An oxygen gas generating device arranged in the transport box can thus be particularly well protected and its transport can thus be made easier.
  • the transport box can be designed to float in water together with the oxygen gas generating device arranged in it.
  • the transport box consists entirely or partially of plastic, in particular polyester fiber. This makes it possible to achieve particularly good durability and at the same time a relatively low mass of the transport box.
  • the (empty) transport box preferably has a mass of at most 35 kg, more preferably at most 30 kg.
  • the transport box can be designed in particular according to military standards, for example certified according to 15MIL-Spec and/or MIL-STD 810. It is preferably at least partially lined with an elastic material for shock absorption; in this way, particularly good protection of the oxygen gas generation system can be ensured during transport.
  • the inside of the transport box can be at least partially lined with a material for sound insulation or soundproofing. In this way, noise emissions from the oxygen gas generation device can be kept particularly low when it is operated in the (possibly open) transport box (or in the lower part of the box).
  • the transport box has a cuboid-like basic shape. This makes it easy to stack and store and can be arranged in a space-saving manner, in particular together with other transport boxes, for example for transport.
  • the transport box preferably has at least two handles.
  • the handles can be arranged on the lid and/or the base.
  • the handles have a movable suspension, in particular can be pivoted (relative to the lid and/or base), are particularly advantageous.
  • When used to lift or carry the transport box (possibly with an oxygen gas generating device arranged therein), they can be folded down from one wall of the transport box for improved grip and, on the other hand, placed against the wall if the oxygen supply system is to be stowed away in a particularly compact manner.
  • an oxygen supply system has at least one roller, by means of which the oxygen gas generating device can be moved and thus repositioned.
  • the at least one roller can be designed to enable the movement (repositioning) in an unraised state of the oxygen gas generating device and/or in a partially raised state, for example on one side.
  • At least one such roller can be arranged on the oxygen gas generating device, in particular on a housing thereof. This makes it easier to reposition the oxygen gas generating device. If the oxygen supply system has a transport box as described above, at least one roller can be arranged on the transport box (alternatively or additionally). This makes it easier to reposition the transport box with the oxygen gas generating device arranged therein.
  • the at least one roller can have an adjustable, in particular fold-out suspension, for example an axis that can be pivoted relative to the oxygen gas generation device or the transport box. In this way, the oxygen supply system can be given a particularly compact shape for storage.
  • a method according to the invention serves to provide an oxygen gas which has a higher oxygen content than the ambient air, for example consists of at least 75 vol.%, at least 80 vol.% or even at least 90 vol.% oxygen.
  • the method includes operating an oxygen supply system according to an embodiment of the present invention.
  • the method can comprise ventilating a plurality of patients (e.g. each using a breathing mask or nasal cannula) who are connected to the oxygen gas generating device or - in corresponding embodiments - to the reserve supply unit of the oxygen supply system.
  • the reserve supply unit can preferably be arranged in a different room than the oxygen gas generating device during ventilation.
  • the plurality can each comprise, for example, five or more patients.
  • Fig. 1 a schematic representation of an oxygen gas generating device of a first exemplary embodiment of an oxygen supply system according to the invention
  • Fig. 2 a schematic representation of an oxygen gas generating device of a second exemplary embodiment of an oxygen supply system according to the invention
  • Fig. 3 a part of an adsorber device of an embodiment of an oxygen supply system according to the invention.
  • Fig. 4 a schematic representation of a third exemplary embodiment of an oxygen supply system according to the invention.
  • Fig. 5 a transport box of an exemplary embodiment of an inventive
  • Figure 1 shows a schematic diagram of a first embodiment of a mobile
  • Oxygen gas generating device 1 of an oxygen supply system according to the invention illustrates the sequence of an exemplary embodiment of a method according to the invention.
  • the oxygen gas generating device 1 has a mass of at most 90 kg or at most 80 kg.
  • the oxygen gas generating device 1 comprises a housing 17 with an inlet 11 for ambient air L. From the inlet 11, the incoming ambient air L is led to a compressor 12, which preferably compresses it to a pressure that is at least 1 bar, at least 1.5 bar or at least 2.4 bar above the prevailing ambient pressure.
  • the air compressed in this way is then fed to an (in this case single) adsorber device 10, which uses pressure swing adsorption to produce a gas S that consists of at least 90% oxygen by volume.
  • the adsorber device 10 is preferably designed as a multi-chamber adsorber device with a plurality of adsorber chambers, each containing at least one adsorbent (in particular at least one zeolite); in particular, it can have a closing device, as described above.
  • the (oxygen) gas S produced is compressed in a compressor 13, preferably to a pressure of at least 1.5 bar, at least 2 bar, at least 2.5 bar, at least 5 bar, at least 5.5 bar, at least 6 bar or at least 6.5 bar.
  • the compressed gas produced is then stored in (in this case a single) storage unit, which preferably comprises at least one pipe coil for receiving the gas S produced and from which it can be discharged via (in this case two) outlets 15.
  • One of the outlets 15 in this case has a pressure regulator 16, which is designed to set a desired discharge pressure for the oxygen gas S produced.
  • At least one of the outlets 15 can preferably be connected to a filling system for oxygen bottles and/or to a medical device (such as in particular an anesthesia machine and/or a ventilation mask) (not shown). Control by the pressure regulator 16 can then take place (automatically or set by a user) depending on a number and/or type of connected devices.
  • a medical device such as in particular an anesthesia machine and/or a ventilation mask
  • the housing of the oxygen gas generating device 1 shown schematically in Figure 1 surrounds the compressor 12, the adsorber device 10, the compressor 13 and the storage device 14 as well as device electronics 18 of the oxygen gas generating device 1 arranged in the device interior I.
  • Such device electronics 18 can (if necessary together with at least one further electronic component) in particular form at least part of a computer unit which can be used, for example, to control, regulate and/or monitor the adsorber device 10, the compressor 12, the condenser 13, the accumulator 14 and/or the pressure regulator 16 and/or to communicate with a user via an input and/or output unit (not shown).
  • exhaust air A generated in the adsorber device 11 during pressure swing adsorption is led into the interior of the device I, in particular to the device electronics 18, which in this case is surrounded by the exhaust air A and is thereby cooled.
  • the exhaust air A is then discharged through an outlet of the housing 17 into an environment of the oxygen gas generation device 1, conveyed by at least one fan 19.
  • FIG. 2 shows a schematic structural diagram of a second embodiment of an oxygen gas generating device 1' of an oxygen supply system according to the invention.
  • the oxygen gas generating device 1' has two adsorber devices 10', which are preferably designed to work individually (one after the other) or synchronously.
  • at least one of the adsorber devices 10' is designed as a multi-chamber adsorber device with a plurality of adsorber chambers each containing at least one adsorbent (in particular at least one zeolite); in particular, it can have a closing device, as described above.
  • the adsorber devices 10' are each supplied with ambient air which has entered a respective compressor 12' through a respective inlet 11' and which has then preferably been compressed by the compressor to a pressure which is at least 1 bar, at least 1.5 bar or at least 2.4 bar above a respective prevailing ambient pressure.
  • the (oxygen) gas S produced by the adsorber devices 12' is in this case fed to a common compressor 14', which compresses it according to the above preferably to a pressure of at least 1.5 bar, at least 2 bar, at least 2.5 bar, at least 5 bar, at least 5.5 bar, at least 6 bar or at least 6.5 bar before it is stored in the storage device 14'.
  • the gas produced can be discharged according to the above via (in this case two) outlets 15', one of which in this case has a pressure regulator 16' for setting a desired discharge pressure for the oxygen gas S produced.
  • a housing 17' surrounds the compressors 12', the adsorber devices 10', the compressor 13' and the storage 14'
  • Exhaust air A emitted by the adsorber devices 10' is guided into the interior I' of the oxygen gas generating device 1' and emitted by means of at least one fan 19' through an outlet in the housing 17'.
  • an exhaust air stream of the exhaust air A that is created thereby leads past a device electronics and thus cools them; for reasons of clarity, the device electronics are not shown in Figure 2.
  • FIG 3 schematically shows an adsorber device 10" of an oxygen gas generating device of an oxygen supply system according to the invention in an orientation intended for use; the adsorber device 10" can in particular correspond to the adsorber device 10 shown in Figure 1 and/or to the adsorber device 10' shown in Figure 2.
  • the adsorber device 10 is designed here as a multi-chamber adsorber device which has a plurality of exhaust air outlets 10ia, 10ib and a closing device 10 2 on its upper side.
  • the closing device 10 2 can in particular comprise a stepper motor. It is designed to open or close respective outlets of the adsorber chambers and in particular the exhaust air outlets 10ia, 10ib depending on a respective adsorbent saturation.
  • the adsorber device 10" is here connected in an airtight manner to a cap IO3 on its upper side, including a radial seal IO4, whereby a space P is enclosed by the upper side and the cap IO3.
  • the cap IO3 couples both the exhaust air outlets 10ia, 10ib and also the closing device 10 2 .
  • the cap IO3 has an opening ⁇ in which a moisture barrier 10s is arranged. As is schematically illustrated in Figure 3, this moisture barrier 10s allows exhaust air A to escape from the room P, but prevents moisture F from penetrating into the room P from outside. This protects the adsorber device 10" and extends the duration and reliability of its functionality, particularly when the device is not in operation or is being stored.
  • FIG 4 schematically shows an embodiment of a transportable oxygen supply system 100 according to the invention with an oxygen gas generating device 1" and a reserve supply unit 2; the oxygen gas generating device 1" has an inlet 11" and an outlet 15" and can otherwise be designed like the oxygen gas generating device 1 of Figure 1 or the oxygen gas generating device 1' of Figure 2; details of the oxygen gas generating device 1" are therefore not shown again in Figure 4.
  • the oxygen gas generating device 1" and the reserve supply unit 2 have separate housings 17" and 20 respectively and are detachably connected in the illustrated state by a gas line 21i, a control line 22i and a power line 23.
  • the gas line 21i connects an outlet 15" of the oxygen gas generating device 1" to a gas inlet 24 of the reserve supply unit 2.
  • the oxygen gas generating device 1" and the reserve supply unit 2 can be transported separately from one another.
  • the reserve supply unit 2 is supplied with energy via the power line 23 by or through the oxygen gas generating device 1", for example by means of a power generator included in or connected to the latter and/or by means of a battery included in or connected to the oxygen gas generating device 1", as mentioned above.
  • the gas line 21i opens at the gas inlet 24 of the reserve supply unit 2 into a gas line system 21, which in the present case comprises three check valves 212a, 212b, 212C and leads in particular from the gas inlet 24 to gas outlets 26a, 26b.
  • a gas line system 21 which in the present case comprises three check valves 212a, 212b, 212C and leads in particular from the gas inlet 24 to gas outlets 26a, 26b.
  • an anesthesia device 4 is connected to the gas outlet 26a; alternatively, an active ventilator 5 can also be connected here.
  • the gas outlet 26b is designed as a withdrawal point for connecting several supporting ventilation devices; in the embodiment shown, two output devices in the form of nasal cannulas 6 and ventilation masks 7 are connected to the gas outlet 26, each including an associated flow regulator 8.
  • respective filter modules 27a, 27b are arranged at the gas outlets 26a, 26b, with which the required biocompatibility of the oxygen gas provided to the patients through the entire gas path in the oxygen supply system can be ensured, while avoiding complex testing and verification for individual components.
  • a release of oxygen gas at the gas outlets 26a, 26b can be controlled via a control line system 22 of the reserve supply unit 2 (shown in Figure 4 by dashed lines), into which the control line 22i opens.
  • the reserve supply unit 2 in the present case further comprises two oxygen bottles 25a, 25b, which are connected to the gas line system 21 and which can also be controlled via the control line system 22 of the reserve supply unit 2.
  • the oxygen gas supply system 100 is designed to automatically switch from a first operating mode of the reserve supply unit 2, in which the gas outlets 26a, 26b are supplied exclusively with oxygen gas generated by the oxygen gas generating device 1" and taken in via the gas line 21i, to a second operating mode of the reserve supply unit 2, in which the gas outlets 26a, 26b are at least partially supplied with oxygen gas that comes from a first of the oxygen bottles 25a.
  • the switching can take place in particular on the basis of a supply capacity of oxygen gas by the oxygen gas generating device; the supply capacity can be determined, for example, by measuring a volume flow or pressure at the outlet of the oxygen gas generating device and/or in the gas line system 21.
  • oxygen gas generation device does not provide sufficient oxygen gas, as may occur, for example, as a result of a malfunction, oxygen gas from the first oxygen cylinder 25a can be temporarily used.
  • the oxygen gas supply system 100 is also configured to automatically switch from the second operating mode of the reserve supply unit 2 to a third operating mode in which the oxygen bottle 25b is used to provide oxygen gas as an alternative or in addition to the first oxygen bottle 25a.
  • the switching can be carried out, for example, on the basis of a volume flow or pressure in the gas line system 21 and/or based on a (calculated or measured) fill level of the first oxygen bottle 25a.
  • the reserve supply unit 2 of the oxygen supply system 100 shown in Figure 4 also has an alarm monitor 28.
  • At least one functional parameter of the oxygen gas generation device 1", at least one operating parameter of the reserve supply unit 2, a gas flow through the gas inlet 24 and/or through the at least one gas outlet 26a, 26b and/or at least one property of the oxygen gas generated or emitted can be displayed on it.
  • a visual and/or an acoustic alarm can be issued by means of the alarm monitor 28.
  • the alarm monitor 28 is arranged removably on the outside of the housing 20, wherein oxygen can be discharged via the at least one gas outlet 26a, 26b even when the alarm monitor 28 is removed.
  • FIG. 5 shows a transport box 3 of an oxygen supply system according to the invention in accordance with an embodiment.
  • the transport box 3 has a cuboid-like basic shape and comprises a lower part 30 and a cover 31 that can be completely removed from the lower part.
  • the cover 31 can be fixed to the lower part 30 by means of clamps 32a and associated clamping recesses 32b (of which only two are provided with reference numerals in Figure 5 for reasons of clarity) when it is placed on the lower part 30.
  • the transport box 3 closed in this way is preferably airtight and/or sand-tight and/or splash-proof (or even waterproof).
  • the transport box 3 forms a receiving space R for an oxygen gas generating device of the oxygen supply system (not shown in Figure 5); when the oxygen gas generating device is arranged in the receiving space R, the oxygen gas generating device preferably rests on at least two opposite sides on a respective wall of the transport box 3, which in the present case is lined with an elastic material 33 for shock absorption; the elastic material 33 preferably also serves as sound insulation or soundproofing.
  • the transport box 3 also has four rollers 34, of which only two are visible in Figure 5 due to the perspective.
  • the rollers preferably have an adjustable suspension so that they can be lowered into a transport box wall for stowing the transport box or the oxygen supply system and can be completely or partially removed from their recess for use. can be moved. The lowering can prevent unwanted rolling and also allows the oxygen supply system to be stowed away in a particularly space-saving manner.
  • the transport box can be moved on all four rollers and/or (in a one-sided raised position) on only two of the rollers.
  • handles 35 are pivotably arranged on both the lower part 30 and the lid 31, by which the transport box with an oxygen gas generating device to be arranged therein can preferably be lifted and carried and/or pulled when rolling.
  • the handles 35 are recessed into a respective outer wall of the lower part 30 or lid 31, so that they do not protrude and thus do not hinder the transport box when being stowed away.
  • a transportable oxygen supply system 100 with an oxygen gas generating device 1, 1', 1" is disclosed.
  • the oxygen gas generating device 1, 1', 1" comprises at least one compressor 12, 12' for compressing ambient air L and at least one adsorber device 10, 10', 10", which is designed to generate an oxygen gas S with an increased oxygen content from ambient air L compressed by at least one compressor 12, 12' by means of pressure swing adsorption.
  • the oxygen gas generating device 1, 1', 1" comprises at least one compressor 13, 13' for compressing the generated gas S, at least one storage device 14, 14' for receiving the gas compressed by the at least one compressor and one or more outlets 15, 15' for discharging the generated gas from the at least one storage device 14, 14'.

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Abstract

L'invention concerne un système transportable de fourniture d'oxygène (100) comportant un appareil de production d'oxygène gazeux (1, 1 ', 1 "). L'invention concerne un appareil de production d'oxygène gazeux (1, 1', 1'') comprenant au moins un compresseur (12, 12') pour comprimer de l'air ambiant (L) ainsi qu'au moins un dispositif d'adsorption (10, 10', 10'') qui est conçu pour produire, par adsorption modulée en pression, un gaz d'oxygène (S) à teneur accrue en oxygène à partir d'air ambiant (L) comprimé par le ou les compresseurs (12, 12'). En outre, l'appareil de production d'oxygène gazeux (1, 1', 1'') comprend au moins un compresseur (13, 13') pour comprimer le gaz (S) produit, au moins un réservoir (14, 14') pour recevoir le gaz comprimé par le ou les compresseurs et une ou plusieurs sorties (15, 15') pour distribuer le gaz produit à partir du ou des réservoirs (14, 14'). Cette invention concerne en outre un procédé de fourniture d'oxygène gazeux (S), ce procédé consistant notamment à faire fonctionner un système de fourniture d'oxygène (100).
PCT/EP2023/081917 2022-11-16 2023-11-15 Système de fourniture d'oxygène et procédé WO2024105107A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102022130305.5 2022-11-16
DE102022130305 2022-11-16
EP22211367.2A EP4371648A1 (fr) 2022-11-16 2022-12-05 Système et procédé de fourniture d'oxygène
EP22211367.2 2022-12-05

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