RU217973U1 - Portable oxygen concentrator - Google Patents

Abstract

The utility model relates to adsorption devices for obtaining oxygen from atmospheric air by the adsorption method used to provide oxygen to people suffering from the negative effects of hypoxia. The portable oxygen concentrator consists of a housing 1 containing a filter 2, a compressor 3 with an adjustable air intake volume, an adsorption unit including adsorption zeolite columns 4 and 5, a receiver 6 and a dryer 7, a lithium-ion battery 8 with a built-in charging mechanism. The device also includes inlet 9 and outlet 10 valves, a control and monitoring unit 11, fitting 12. The device is equipped with a container 13 with a replaceable double 14 and tee 15, allowing you to connect oxygen masks (nasal cannulas) 16 and provide oxygen from one to three people at the same time. The technical result of the utility model is the ability to operate from various power sources to ensure uninterrupted operation of the device. 1 ill.

Description

The proposed utility model relates to adsorption devices for obtaining oxygen from atmospheric air by the adsorption method used to provide oxygen to people suffering from the negative effects of hypoxia.

A portable membrane-adsorption oxygen concentrator is known (RU No. 196293 U1, IPC B01D 53/047, A61M 16/10, publ. non-heating adsorption and a membrane enrichment unit based on the technology of membrane gas separation. Gas is supplied by the first stage of a two-stage vacuum compressor to a sorption unit consisting of three adsorbers, to one of the adsorbers, in which nitrogen is selectively sorbed and the gas mixture is enriched with oxygen. The oxygen-enriched gas enters the storage receiver, from which it is fed to the membrane module of the membrane unit for further enrichment with oxygen and purification from sorbent attrition products. The gas that has passed through the membrane is supplied to the consumer, and the gas that has not passed is returned to the sorption unit and enters another adsorber for regeneration of the sorbent by the countercurrent purge method and further filling of the adsorber. At the same moment, in the third adsorber, the exhaust gas present in it is discharged into the atmosphere, after which, using the second stage of a two-stage vacuum compressor, the remaining gas is pumped out of it - the adsorbent is vacuum regenerated. After some time, the adsorbers change their functions: the adsorber in which sorption occurred releases gas and is pumped out; After vacuum regeneration, the gas that has not passed through the membrane begins to be supplied to the adsorber for countercurrent purge and filling, and gas from the vacuum compressor enters the filled adsorber and the production of an oxygen-enriched mixture begins.

Despite the claimed increase in productivity, degree of extraction and concentration of oxygen in the resulting product, the description of the invention does not indicate the overall dimensions of the portable membrane adsorption concentrator.

A device and a method for separating oxygen (RU No. 2571132C2, IPC B01D 53/22, publ. 20.12.2015) from an oxygen-containing gas, containing a membrane unit and an electrode unit, is known. The membrane block contains a porous substrate, a dense membrane and at least one electrode. The porous substrate faces the electrode block, which includes at least one electrode containing at least one rotary electrode wing, which at least partially conducts electricity.

Although the device allows oxygen to be released with improved efficiency and greater comfort in terms of maintenance and noise, the size and cost of the device, which are the main indicators of known oxygen concentrators, are not indicated, since the high cost is associated with the production and operation of these devices.

An oxygen concentrator is known (RU No. 2117522 C1, IPC B01D 53/04, G05D 27/00, publ. 08/20/1998), containing a compressor, a pneumatic distributor and two adsorbers. The outputs of the adsorbers are connected to the outputs of the throttle and the inputs of the oxygen collection tank. The concentrator contains a control unit, the outputs of which are connected to the control inputs of the pneumatic distributor and normally closed pneumatic valve. Each adsorber is made in the form of a hollow cylindrical body and a hollow insert filled with a sorbent, with branch pipes located on one side.

The disadvantage of the known invention is the high metal and energy consumption of the production line, which is economically inefficient.

An autonomous complex for providing oxygen to the victims is known (RU No. 2261218 C1, IPC C01B 13/02, publ. 09/27/2005), including interconnected gases using a switch, permanently placed, or in a container body, or a van body anesthesiology-resuscitation-oxygenotherapy module, energy module, nitrous oxide cylinders and oxygen module. The latter includes a portable set of adsorption oxygen concentrator connected to work with artificial lung ventilation devices, oxygen inhalation devices, inhalation anesthesia. The latter are part of the anesthesiology-resuscitation-oxygen therapy module and are interconnected with the oxygen module and the power supply. Each thermochemical oxygen generator contains a safety valve connected through the first dust filter to the first outlet of the reactor, the second outlet of the reactor through the second dust filter is connected to the inlets of the pressure relief valve and the heat exchanger, the outlet of which is connected through the outlet fine filter with a check valve, the outlet of the check valve is connected to the oxygen regulator, high pressure outlet valve, dual alarm and oxygen cylinder. The gas switch includes their switches, indicators and signaling devices for the minimum pressure thresholds of all gases.

The disadvantages of the known device include the bulkiness and complexity of the autonomous complex. The maximum possible battery life of the oxygen concentrator included in the oxygen supply complex is not indicated.

An oxygen separator and a method for producing oxygen are known (RU No. 2631348 C2, IPC B01D 53/047, publ. 09/21/2017), including at least one oxygen separating device containing an oxygen separating sorbent for separating oxygen from an oxygen-containing gas. The oxygen separating device has a gas inlet on the primary side connected to the inlet pipeline for directing the flow of oxygen-containing gas to the oxygen separating device, and has a gas outlet on the secondary side connected to the outlet pipeline for directing the flow of oxygen-enriched gas from the oxygen separating device. The secondary side of the oxygen separating device is further connected to a source of purge gas for directing the purge gas through the oxygen separating device. The primary side of the oxygen separating device is connected to a bleed line for directing off-gas from the oxygen separator. The oxygen separator further includes a pressure regulating device for creating a pressure differential between the primary side and the secondary side of the oxygen separating device. A gas sensor is provided in the outlet conduit for detecting the concentration of at least one off-gas component.

Although the invention provides improved controllability, the description does not indicate the maximum operating time and overall dimensions of the prior art oxygen separator.

From the prior art, an ejector membrane-sorption device for separating gas mixtures (RU No. 139877 U1, IPC B01D 53/00, publ. 27.04.2014) is known, containing a compressor, to the outlet of which at least two adsorbers filled with a solid adsorbent are connected, and inlet of the ejection mixer. The outlet of the latter is connected through the first distribution valve to the inlet pipes of the adsorbers. The outlets of the adsorbers are equipped with control valves for venting gas from the adsorbers to the discharge pipeline and are connected through the second distribution valve to the membrane filter, one of the outlet pipes of which is connected to the consumer, and the second to the ejection mixer.

The main disadvantage of this device is the organization of the regeneration of the adsorbent used by the direct-flow pressure reduction method, which does not allow achieving deep regeneration of the adsorbent and, as a result, obtaining high oxygen concentrations. In addition, a complex ejection pumping system is implemented in the pressure reduction unit: the discharged gas first enters the receiver, and then the gas from the receiver through the ejector must entrain the gas from the adsorber, which is quite complicated.

Also known from the prior art is an ejector membrane-sorption device for separating gas mixtures (RU No. 2625983 C1, IPC B01D 53/047, publ. 07/20/2017), containing at least two adsorbers filled with a solid adsorbent, a compressor, an outlet pipe which is connected to the adsorbers through adjustable valves and to the inlet to the ejection mixer, the outlet of which is connected through the first distribution valve to the inlet nozzles of the adsorbers. The outlets of the adsorbers are equipped with control valves for venting gas from the adsorbers to the discharge pipeline and are connected through the second distribution valve to the membrane filter, one of the outlet pipes of which is connected to the consumer, and the second to the ejection mixer.

The main disadvantages of the known device are the use of an ejection device for regeneration of the adsorbent, fed by a part of the flow of the installation compressor, and a mixing ejection device, which, by virtue of its device, creates significant additional resistance to the flow leaving the compressor. Together, these two shortcomings lead to significant energy costs.

Also known from the prior art is an oxygen concentrator described in the patent (RU No. 149979 U1, IPC B01D 53/04, publ. into the body. In addition, each adsorber is equipped with a spring-loaded perforated disk inside.

The main disadvantage of this device is the impossibility of organizing a constant pressure and value of the product flow of oxygen without the use of additional receivers. In addition, an additional filter is used to clean the product stream from sorbent attrition products.

Known installation for obtaining oxygen from atmospheric air, described in the patent (RU No. 101646 U1, IPC B01D 53/047, publ. 27.01.2011). This device consists of a compressed air supply unit, including an air compressor and an air dryer, a receiver, two adsorbers filled with sorbent, and a membrane gas separation module. The adsorber inlets are connected to the compressor and two parallel inlet pipelines connected to the discharge pipeline. Gas flow control valves are installed on the inlet pipelines, connected to their control unit for switching the flow from the compressor between the adsorbers and for venting air from the adsorbers through the discharge pipeline. Two parallel outlet pipelines connect the outlet valves of the canisters. The first outlet pipeline is connected to the inlet to the receiver and is equipped with check valves. The outlet of the receiver is connected by gas communication with the inlet of the membrane gas separation module, made in the form of two technological volumes of high and low pressure separated by a selective membrane. The outlet from the low pressure volume of which is connected to the consumer, and the outlet from the high pressure volume through the flow device is connected to the second outlet pipeline, on which two outlet gas flow control valves are installed to switch the gas flow between the gas separation module and adsorbers. A non-return valve is installed before the receiver inlet.

The main disadvantages of such an installation are, firstly, the impossibility of organizing a membrane module supply flow that is stationary in size and pressure, and secondly, the use of a flow enriched with the target component that has not passed through the membrane when the adsorbers are purged, which helps to reduce the recovery factor.

The closest in technical essence and the achieved result to the claimed utility model is an oxygen concentrator (RU No. 145367 U1, IPC B01D 3/04, publ. 09/20/2014), which works by separating atmospheric air by short-cycle non-heating adsorption on synthetic zeolites. The oxygen concentrator contains a compressor connected by pipelines with an inlet filter, two devices for dividing the air flow, made in the form of zeolite columns, a receiver, a control unit. The compressor at the outlet is connected to the condenser through a dehumidification valve and to the zeolite columns through a block of solenoid valves, alternating the sequence of supplying the dried air flow to the zeolite columns, with the possibility of ensuring their operation in antiphase. The operation of the solenoid valves is controlled by feedback, depending on the inlet pressure at the inlet from the zeolite columns, which are connected to the receiver through two check valves with different throughput depending on the direction of the air flow pressure. The device is equipped with a receiver and a reducer to obtain a pressure of 0.36÷0.4 MPa.

The disadvantages of the known device include the lack of information about the maximum duration of operation and overall dimensions of the device, which does not allow to fully evaluate the effectiveness of the utility model.

The technical objective of the utility model is the development of a portable oxygen concentrator as a small-sized autonomous unit in a pandemic and crisis situations with medical ventilators.

The technical result of the utility model is the ability to operate from various power sources to ensure uninterrupted operation of the device.

The specified technical result is achieved by the fact that in the created portable oxygen concentrator, including a housing in which a filter is located, a compressor with an adjustable air intake volume, an adsorption unit, including adsorption zeolite columns, a receiver and a dehumidifier, an accumulator, inlet and outlet valves, a control unit and control, fitting, according to the useful one, they use a filter for multi-stage purification of incoming air and a lithium-ion battery with a built-in charging mechanism, while the fitting is equipped with a replaceable double and tee.

The use of a lithium-ion battery and equipping the fitting with a replaceable twin and tee ensures the ability to work from various power sources to ensure uninterrupted operation of the device - charging the battery from solar panels, 220 V, 12 V, Power-Bank, provide oxygen with a concentration of 70-97 % 1-3 people at the same time by using a double or tee connection to the fitting.

The analysis of the prior art carried out by the applicant, including searching through patent and scientific and technical sources of information and identifying sources containing information about analogues of the utility model, made it possible to establish that the applicant did not find a source characterized by features identical to all essential features of the claimed utility model. The definition from the list of identified analogues of the prototype, as the analogue closest in terms of set of features, made it possible to establish a set of distinctive features that are significant in relation to the technical result considered by the applicant in the claimed device, set forth in the formula of the utility model.

The proposed portable oxygen concentrator is illustrated in the drawing, which shows a schematic diagram of a device for producing oxygen.

A portable oxygen concentrator is a device for separating oxygen from an oxygen-containing gas, consisting of a housing 1, in which there is a filter 2 for multi-stage purification of incoming air, a compressor 3 with an adjustable air intake volume, an adsorption unit, including adsorption zeolite columns 4 and 5, a receiver 6 and dehumidifier 7, lithium-ion battery 8 with built-in solar charging mechanism, 220 V mains, 12 V mains, Power-Bank. The device also includes an inlet 9 and outlet 10 valves, a control and monitoring unit 11, a fitting 12. The device is equipped with a container 13 with a replaceable double 14 and a tee 15, allowing you to connect oxygen masks (nasal cannulas) 16 and provide oxygen from one to three people at the same time.

The claimed device according to the scheme operates as follows.

The compressor 3, supported by the accumulator 8, sucks in atmospheric air, which is an oxygen-containing gas mixture, through the inlet valve 9 into the filter 2 and pumps it into the dryer 7, where the water vapor contained in the gas mixture is condensed. Filter 2, compressor 3, adsorption unit and control unit 11 are interconnected by an electric cable, air and oxygen hoses. Then the dried gas mixture enters the first zeolite column 4, where nitrogen is sorbed by the zeolite, and the gas mixture with an increased oxygen content is sent to the receiver 6. Part of this mixture is supplied to the consumer through the fitting 12, and part is sent to the second zeolite column 5 for desorption of nitrogen and its output to the atmosphere through the exhaust valve 10. The control and monitoring unit 11, the pipelines of which connect the adsorbers with the receiver, compressor, oxygen consumers and between them, controls the power supply of the compressor 3 and the switching system of the solenoid valves of both adsorbers to alternate the operation of the columns in such a way that that every 15 minutes of operation there was a change in the operation of columns 4 and 5. The control and monitoring unit 11 also contains oxygen valves, adsorption-desorption electropneumatic valves and check valves. The device allows you to receive oxygen at a rate of 1 l / min with a maximum concentration of 97%. Battery 8 with a built-in charging mechanism allows you to charge the device from solar panels, 220 V, 12 V, Power-Bank, which ensures uninterrupted operation of the device. Equipping the fitting with a replaceable double and tee allows you to connect 2 and 3 oxygen masks (nasal cannulas), respectively, and provide oxygen from one to three people at the same time.

A practical test of the operation of a portable oxygen concentrator was carried out on the basis of OOO MIP BaikalEcoProduct of the East Siberian State University of Technology and Management.

The proposed portable oxygen concentrator is suitable for use both in medical institutions and for private use by citizens as a portable mobile device for supplying oxygen to people in megacities during smog, for military personnel serving in the highlands, for mountaineers, in heavy smoke and forest fires, smokers with experience. The device is universal.

The advantages of the proposed oxygen concentrator:

- Maximum oxygen concentration 97%;

- Low noise;

- Mobile;

- Allows you to receive both dry and humidified oxygen, depending on the purpose;

- Charging from solar panels, 220 V network, 12 V network, from Power-Bank;

- The operating time is not limited (unlike devices from other manufacturers, the operating time of which is limited to 5 hours);

- Providing oxygen at the same time to 3 people.

The small size of the proposed utility model allows the use of an oxygen concentrator in hospitals and at home to provide emergency care or long-term oxygen therapy for pulmonary, heart diseases, COPD, etc., residents of megacities to compensate for hypoxia during smog, smokers to reduce the negative effects of tobacco smoke on the body, mountain climbers and military personnel serving in the highlands, to saturate the body with oxygen, during heavy smoke and forest fires, during chemical man-made disasters, for children to strengthen immunity, increase physical and mental activity.

Claims (1)

Portable oxygen concentrator, including a housing in which a filter is located, a compressor with an adjustable air intake volume, an adsorption unit, including adsorption zeolite columns, a receiver and a dryer, an accumulator, inlet and outlet valves, a control and monitoring unit, a fitting, characterized in that they are used a filter for multi-stage cleaning of the incoming air and a lithium-ion battery with a built-in charging mechanism, while the fitting is equipped with a replaceable twin and tee.

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