CN109012047B - Low oxygen generation system capable of simulating high primary oxygen concentration - Google Patents

Low oxygen generation system capable of simulating high primary oxygen concentration Download PDF

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Publication number
CN109012047B
CN109012047B CN201810903934.4A CN201810903934A CN109012047B CN 109012047 B CN109012047 B CN 109012047B CN 201810903934 A CN201810903934 A CN 201810903934A CN 109012047 B CN109012047 B CN 109012047B
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oxygen concentration
oxygen
value
opening
analyzer
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CN109012047A (en
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何丰
修凯
毕胜利
李福顺
欧阳群
路士庆
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Handan Peric Gas Equipment Co ltd
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Handan Peric Gas Equipment Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/22Separation 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 diffusion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/30Controlling by gas-analysis apparatus
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/22Separation 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 diffusion
    • B01D2053/221Devices
    • B01D2053/223Devices with hollow tubes
    • B01D2053/224Devices with hollow tubes with hollow fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2256/00Main component in the product gas stream after treatment
    • B01D2256/12Oxygen

Abstract

The invention provides a low oxygen generating system and a control method capable of simulating plateau oxygen concentration, which can simulate the plateau oxygen concentration. The method comprises the following steps: the device comprises a compressed air module, a hollow fiber membrane module and a low-oxygen gas buffer tank which are sequentially connected through a pipeline; an oxygen concentration control module is arranged on a pipeline between the hollow fiber membrane module and the low-oxygen gas buffer tank; the oxygen concentration control module includes: the device comprises a control unit, an oxygen concentration analyzer, a gas shunt joint A connected with a hollow fiber membrane component, a gas shunt joint B connected with a low-oxygen gas buffer tank, and more than three branches arranged between two gas shunt joints in parallel, wherein one branch is provided with an electric flow regulating valve, and each of the rest branches is provided with an electromagnetic valve; when the oxygen concentration of the hypoxic air is given, the control unit controls the opening degree of the electric flow regulating valve and the opening and closing of the more than two electromagnetic valves, so that the oxygen concentration value detected by the oxygen analyzer is consistent with the given oxygen concentration value.

Description

Low oxygen generation system capable of simulating high primary oxygen concentration
Technical Field
The invention relates to a low oxygen generating system, in particular to a low oxygen generating system capable of simulating high primary oxygen concentration.
Background
In recent years, researches prove that the weight is reduced under the hypoxia environment, exercise can achieve the effects of reducing the weight, improving the blood fat metabolism, improving the heart and lung functions and the like by increasing energy consumption, the athletic performance of athletes is improved, and in addition, the weight-losing effect of the hypoxia exercise is superior to that of the normoxic exercise.
Prior published patent CN 102491277A: the control provides an oxygen concentration control technology, an electric control valve is mainly arranged in front of a hollow fiber membrane, and the opening of the electric control valve is adjusted according to information transmitted by an oxygen partial pressure detector behind the hollow fiber membrane so as to adjust the pressure in the membrane, thereby achieving the purpose of controlling the oxygen partial pressure behind the membrane. The technical disadvantage is that the oxygen concentration adjusting speed is slow; the system can cause great pressure change in the membrane and great fluctuation of air supply concentration due to the change of the respiratory capacity and the frequency of a breathing person.
Disclosure of Invention
In view of this, the invention provides a hypoxia generating system capable of simulating the plateau oxygen concentration, which can intelligently adjust the oxygen concentration according to the altitude, quickly and accurately reach the oxygen concentration corresponding to the set altitude, and the oxygen concentration can be continuously adjusted and controlled.
The hypoxia generating system capable of simulating high primary oxygen concentration comprises: the device comprises a compressed air module, a hollow fiber membrane module and a low-oxygen gas buffer tank which are sequentially connected through a pipeline; an oxygen concentration control module is arranged on a pipeline between the hollow fiber membrane module and the low-oxygen gas buffer tank;
the compressed air module is used for providing compressed air for the hollow fiber membrane module;
the hollow fiber membrane component is used for separating oxygen in the compressed air, and the separated low-oxygen air passes through the oxygen concentration control module and then is input into the low-oxygen gas buffer tank for a later-stage user terminal to use;
the oxygen concentration control module includes: the device comprises a control unit, an oxygen concentration analyzer, a gas shunt joint A connected with the hollow fiber membrane component through a pipeline, a gas shunt joint B connected with the low-oxygen gas buffer tank through a pipeline, and more than three branches arranged between the two gas shunt joints in parallel, wherein an electric flow regulating valve is arranged on one branch, and an electromagnetic valve is arranged on each of the rest branches; the oxygen concentration analyzer is arranged on a pipeline between the gas shunt joint B and the low-oxygen gas buffer tank;
the electric flow regulating valve and the electromagnetic valve are controlled by a control unit, and the oxygen concentration analyzer is used for monitoring the oxygen concentration regulated and controlled by the oxygen concentration control module in real time and feeding back the detected oxygen concentration value to the control unit;
when the oxygen concentration of the required hypoxic air is given, the control unit controls the opening degree of the electric flow regulating valve and the opening and closing of the more than two electromagnetic valves, so that the oxygen concentration value detected by the oxygen analyzer is consistent with the given oxygen concentration value.
The control unit is preset with a curve equation of the oxygen concentration corresponding to the altitude within a set range, when the altitude value is given, the control unit converts the altitude value into a corresponding oxygen concentration value according to the curve equation, and then controls the opening of the electric flow regulating valve and the opening and closing of the two or more electromagnetic valves, so that the oxygen concentration value detected by the oxygen analyzer is consistent with the oxygen concentration value corresponding to the given altitude value.
A branch provided with a manual throttle valve is also connected in parallel between the two gas shunt joints; the fixed opening of the manual throttle valve enables the oxygen concentration value detected by the oxygen analyzer to be consistent with the oxygen concentration value corresponding to the minimum altitude in the curve equation.
The flow diameter of at least one of the two or more electromagnetic valves is different from the flow diameter of the other electromagnetic valves.
In addition, the invention also provides a control method of the hypoxia generating system capable of simulating the high primary oxygen concentration, the number of the electromagnetic valves is N, and the corresponding oxygen concentration of the altitude in the set range is divided into N +2 intervals; the N +2 intervals are sequentially ordered from low to high in oxygen concentration value;
when the oxygen-containing concentration corresponding to the input height value is in a first interval, the electric flow regulating valve and the N electromagnetic valves are not opened, the opening degree of the manual throttle valve is regulated, so that the oxygen content of the gas separated by the hollow fiber membrane module is consistent with the oxygen-containing concentration corresponding to the input height value, and then the opening degree is used as the fixed opening degree of the manual throttle valve;
when the oxygen concentration corresponding to the input height value is in a second interval, the manual throttle valve keeps a fixed opening, the N electromagnetic valves are not opened, and the control unit adjusts the opening of the electric flow regulating valve to enable the oxygen concentration value detected by the oxygen concentration analyzer to be consistent with the oxygen concentration corresponding to the input height value;
when the oxygen concentration corresponding to the input height value is in the 2+ i interval, i is an integer greater than or equal to 1, the manual throttle valve keeps a fixed opening, the single chip microcomputer controller controls the opening of the i electromagnetic valves and simultaneously adjusts the opening of the electric flow regulating valve, so that the oxygen concentration value detected by the oxygen concentration analyzer is consistent with the oxygen concentration corresponding to the input height value;
when the oxygen concentration corresponding to the input height value is in the (N + 2) th interval, the manual throttle valve keeps a fixed opening, the single-chip microcomputer controller controls all the electromagnetic valves to be opened, and meanwhile, the opening of the electric flow regulating valve is adjusted, so that the oxygen concentration value detected by the oxygen concentration analyzer is consistent with the oxygen concentration corresponding to the input height value.
Has the advantages that:
(1) the oxygen concentration can be intelligently adjusted according to the simulated plateau oxygen concentration by adopting the hypoxia generation system, namely according to the given altitude, and the hypoxia generation system can be continuously and freely set in the set altitude range, and the hypoxia generation system can simulate the oxygen content (about 10.6-18.8%) at the altitude of 1000-5500 m.
(2) The hypoxia generation system adopts the technology of sectional regulation and precise regulation, ensures that the oxygen concentration can be continuously regulated and controlled, and can quickly and accurately reach the oxygen concentration corresponding to the set altitude. The electromagnetic valve is adopted to be quickly turned off so that the oxygen concentration can quickly reach the vicinity of the oxygen concentration corresponding to the set altitude; the electric regulating valve has a small regulating range, can accurately control the oxygen concentration, and has the oxygen content fluctuation less than or equal to 0.1 percent; therefore, the hypoxic air corresponding to any altitude in the altitude range of 1000 m-5500 m can be rapidly output through the matching control of the electric regulating valve and the electromagnetic valve.
Drawings
FIG. 1 is a schematic view of a hypoxia generation system of the present invention;
FIG. 2 is a schematic diagram of an oxygen concentration control module.
Wherein: the system comprises a 1-compressed air module, a 2-pipeline, a 3-hollow fiber membrane module, a 4-oxygen concentration control module, a 4-1-gas shunt joint A, a 4-2-electric flow regulating valve, a 4-3-solenoid valve A, a 4-4-solenoid valve B, a 4-5-solenoid valve C, a 4-6-manual throttle valve, a 5-oxygen concentration analyzer, a 6-low-oxygen gas buffer tank, a 7-oxygen-enriched gas buffer tank, an 8-single chip microcomputer controller, and a 9-touch screen
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The embodiment provides a hypoxia generation system capable of simulating high primary oxygen concentration, which adopts a segmented regulation and control technology and an accurate regulation technology, so that a hypoxia environment (corresponding to oxygen concentration of 10.6% -18.8%) corresponding to an altitude range of 1000 m-5500 m can be simulated, and the oxygen content of the set altitude can be quickly and accurately reached.
As shown in fig. 1, the hypoxia generation system includes: the device comprises a compressed air module 1, a hollow fiber membrane module 3, an oxygen concentration control module 4 and a low-oxygen gas buffer tank 6. Wherein the compressed air module 1 is used for providing clean compressed air, and the gas pressure range of the provided compressed air is as follows: 0.2Mpa to 0.7 Mpa; the compressed air module 1 is connected with the hollow fiber membrane module 3 through the pipeline 2, so that the compressed air flows to the hollow fiber membrane module 3 through the pipeline 2, the hollow fiber membrane module 3 has the function of separating oxygen in the compressed air, and the separated oxygen-enriched air (the oxygen content: 21-35%) flows into the oxygen-enriched air buffer tank 7 for the use of a later-stage user terminal; the separated air with low oxygen content, namely hypoxic air (the oxygen content is 10.6% -18.8%), flows through the oxygen concentration control module 4 and then enters the hypoxic gas buffer tank 6 for the use of the subsequent user terminal. An oxygen concentration analyzer 5 is arranged on a pipeline between the oxygen concentration control module 4 and the low-oxygen gas buffer tank 6, and the oxygen concentration analyzer 5 is used for monitoring the oxygen concentration regulated and controlled by the oxygen concentration control module 4 in real time.
The oxygen concentration control module 4 mainly performs the functions of fast adjustment and accurate control of the oxygen concentration in the hypoxic air, as shown in fig. 2, the oxygen concentration control module 4 includes: the gas flow control valve comprises a singlechip controller 8, a gas shunt joint A4-1, a gas shunt joint B4-2 and five branches arranged between the two gas shunt joints in parallel, wherein the five branches are respectively provided with a manual throttle valve 4-6, an electric flow control valve 4-2, an electromagnetic valve A4-3, an electromagnetic valve B4-4 and an electromagnetic valve C4-5. Wherein the hollow fiber membrane component 3 is connected with a gas tap A4-1 through a pipeline, and a gas tap B4-2 is connected with a low-oxygen gas buffer tank 6 through a pipeline; the flow diameter of the electromagnetic valve A4-3 is 1 +/-0.5 mm, the flow diameter of the electromagnetic valve B4-4 is 1.6 +/-0.5 mm, the flow diameter of the electromagnetic valve C4-5 is 1.6 +/-0.5 mm, and the maximum flow diameter of the electric regulating valve 4-2 is 1.6 +/-0.5 mm.
The electric flow regulating valve 4-2, the electromagnetic valve A4-3, the electromagnetic valve B4-4 and the electromagnetic valve C4-5 are all controlled by the single chip microcomputer controller 8, and curve equations of oxygen concentration corresponding to different altitudes are preset in the single chip microcomputer controller 8. The oxygen concentration analyzer 5 is connected with the single chip microcomputer controller 8 and is used for feeding back the detected oxygen concentration value to the single chip microcomputer controller 8.
The rapid realization process for simulating the oxygen concentration at different altitudes in the plateau by adopting the hypoxia generation system comprises the following steps:
according to the characteristic that the hypoxic air with different concentrations can be separated under different flow rates and pressures of the air in the hollow fiber membrane, an oxygen concentration control module 4 and an oxygen concentration analyzer 5 are arranged behind the hollow fiber membrane module 3, and curve equations of the oxygen concentration corresponding to different altitudes are preset in a single chip microcomputer controller 8. When a user inputs any height in the touch screen 9, the singlechip controller 8 converts the input height value into a corresponding oxygen concentration value according to a curve equation of oxygen concentration corresponding to different preset altitudes in the singlechip controller, then opens the electromagnetic valve according to a preset control scheme, and controls the opening of the electric flow regulating valve 4-2 to complete pressure and flow control, thereby achieving the control of the oxygen concentration of the outlet gas. The control scheme refers to the opening and closing state of the electric flow control valve 4-2 and the opening degree of the electric flow control valve 4-2, which are set according to the electric flow control valve 4-2 and the flow diameter of each electromagnetic valve.
The control scheme set in the embodiment is as follows:
when the oxygen-containing concentration C corresponding to the input height value is less than or equal to 10%, the electric flow regulating valve and the three electromagnetic valves are not opened, the opening degree of the manual throttle valve 4-6 is manually regulated, so that the oxygen content of the gas separated from the hollow fiber membrane component 3 is about 10% (detected by an oxygen concentration analyzer 5), and then the opening degree is used as the fixed opening degree of the manual throttle valve 4-6.
When the input height value corresponds to the oxygen concentration: when C is more than 10% and less than or equal to 13.5%, the manual throttle valve 4-6 keeps a fixed opening, the three electromagnetic valves are not opened, the single-chip microcomputer controller 8 adjusts the opening of the electric flow regulating valve 4-2 through a PID (proportion integration differentiation) regulating technology, so that the oxygen concentration value detected by the oxygen concentration analyzer 5 is consistent with the oxygen concentration corresponding to the input height value, and the basis of the PID regulating valve opening is the comparison difference value between the oxygen concentration corresponding to the input height value and the actual oxygen concentration detected by the oxygen analyzer 5.
When the input height value corresponds to the oxygen concentration: when C is more than 13.5% and less than or equal to 16%, the manual throttle valve 4-6 keeps a fixed opening, the single chip microcomputer controller 8 controls the electromagnetic valve A4-3 to be opened, meanwhile, the single chip microcomputer controller 8 adjusts the opening of the electric flow regulating valve 4-2 through a PID (proportion integration differentiation) adjusting technology, so that the oxygen concentration value detected by the oxygen concentration analyzer 5 is consistent with the oxygen concentration corresponding to the input height value, and the basis of the opening of the PID adjusting valve is the comparison difference value between the oxygen concentration corresponding to the input height value and the actual oxygen concentration detected by the oxygen analyzer 5.
When the input height value corresponds to the oxygen concentration: when C is more than 16% and less than or equal to 17.5%, the manual throttle valve 4-6 keeps a fixed opening, the single-chip microcomputer controller 8 controls the electromagnetic valve 4-3 and the electromagnetic valve 4-4 to be opened, meanwhile, the single-chip microcomputer controller 8 adjusts the opening of the electric flow regulating valve 4-2 through a PID (proportion integration differentiation) regulating technology, so that the oxygen concentration value detected by the oxygen concentration analyzer 5 is consistent with the oxygen concentration corresponding to the input height value, and the basis of the opening of the PID regulating valve is the comparison difference value between the oxygen concentration corresponding to the input height value and the actual oxygen concentration detected by the oxygen analyzer 5.
When the input height value corresponds to the oxygen concentration: when C is greater than 17.5%, the manual throttle valve 4-6 is kept at a fixed opening, the single chip microcomputer controller 8 controls the electromagnetic valve A4-3, the electromagnetic valve B4-4 and the electromagnetic valve C4-5 to be opened, meanwhile, the single chip microcomputer controller 8 adjusts the opening of the electric flow regulating valve 4-2 through a PID (proportion integration differentiation) adjusting technology, so that the oxygen concentration value detected by the oxygen concentration analyzer 5 is consistent with the oxygen concentration corresponding to the input height value, and the basis of the opening of the PID regulating valve is the comparison difference value between the oxygen concentration corresponding to the input height value and the actual oxygen concentration detected by the oxygen analyzer 5.
The control method adopts three electromagnetic valves to carry out sectional control, and utilizes an electric regulating valve to carry out accurate regulation in sectional concentration.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (2)

1. Can simulate high primary oxygen concentration's hypoxemia system of taking place, its characterized in that includes: the device comprises a compressed air module (1), a hollow fiber membrane module (3) and a low-oxygen gas buffer tank (6) which are connected in sequence through pipelines; an oxygen concentration control module (4) is arranged on a pipeline between the hollow fiber membrane module (3) and the low-oxygen gas buffer tank (6);
the compressed air module (1) is used for providing compressed air to the hollow fiber membrane module (3);
the hollow fiber membrane component (3) is used for separating oxygen in compressed air, and the separated low-oxygen air passes through the oxygen concentration control module (4) and then is input into the low-oxygen gas buffer tank (6) for use by a rear-stage user terminal;
the oxygen concentration control module (4) includes: the device comprises a control unit, an oxygen concentration analyzer (5), a gas shunt joint A (4-1) connected with the hollow fiber membrane component (3) through a pipeline, a gas shunt joint B (4-2) connected with the low-oxygen gas buffer tank (6) through a pipeline, and more than three branches arranged between the two gas shunt joints in parallel, wherein one branch is provided with an electric flow regulating valve, and each of the rest branches is provided with an electromagnetic valve; the oxygen concentration analyzer (5) is arranged on a pipeline between the gas shunt joint B (4-2) and the low-oxygen gas buffer tank (6);
a branch provided with a manual throttle valve (4-6) is also connected in parallel between the two gas shunt joints; the fixed opening of the manual throttle valve enables the oxygen concentration value detected by the oxygen analyzer (5) to be consistent with the oxygen concentration value corresponding to the minimum altitude in a curve equation;
the electric flow regulating valve and the electromagnetic valve are controlled by a control unit, and the oxygen concentration analyzer (5) is used for monitoring the oxygen concentration regulated and controlled by the oxygen concentration control module (4) in real time and feeding back the detected oxygen concentration value to the control unit;
when the oxygen concentration of the required hypoxic air is given, the control unit controls the opening degree of the electric flow regulating valve and the opening and closing of more than two electromagnetic valves, so that the oxygen concentration value detected by the oxygen analyzer (5) is consistent with the given oxygen concentration value;
the flow diameter of at least one of the two or more electromagnetic valves is different from the flow diameter of the other electromagnetic valves;
the number of the electromagnetic valves is N, and the corresponding oxygen concentration of the altitude in the set range is divided into N +2 intervals; the N +2 intervals are sequentially ordered from low to high in oxygen concentration value;
when the oxygen-containing concentration corresponding to the input height value is in a first interval, the electric flow regulating valve and the N electromagnetic valves are not opened, the opening degree of the manual throttle valve (4-6) is regulated, so that the oxygen content of the gas separated by the hollow fiber membrane component (3) is consistent with the oxygen-containing concentration corresponding to the input height value, and then the opening degree is used as the fixed opening degree of the manual throttle valve (4-6);
when the oxygen concentration corresponding to the input height value is in a second interval, the manual throttle valve (4-6) keeps a fixed opening, the N electromagnetic valves are not opened, and the control unit adjusts the opening of the electric flow regulating valve (4-2) to enable the oxygen concentration value detected by the oxygen concentration analyzer (5) to be consistent with the oxygen concentration corresponding to the input height value;
when the oxygen concentration corresponding to the input height value is in the 2+ i-th interval, i is an integer greater than or equal to 1, the manual throttle valve (4-6) keeps a fixed opening, the single-chip microcomputer controller controls the opening of the i electromagnetic valves and adjusts the opening of the electric flow regulating valve (4-2) at the same time, so that the oxygen concentration value detected by the oxygen concentration analyzer (5) is consistent with the oxygen concentration corresponding to the input height value;
when the oxygen concentration corresponding to the input height value is in the (N + 2) th interval, the manual throttle valve (4-6) keeps a fixed opening, the single-chip microcomputer controller controls all the electromagnetic valves to be opened, and meanwhile, the opening of the electric flow regulating valve (4-2) is adjusted, so that the oxygen concentration value detected by the oxygen concentration analyzer (5) is consistent with the oxygen concentration corresponding to the input height value.
2. A hypoxia generation system capable of mimicking high pro-oxygen concentration as in claim 1, wherein: a curve equation of the oxygen concentration corresponding to the altitude within a set range is preset in the control unit, when the altitude value is given, the control unit converts the altitude value into a corresponding oxygen concentration value according to the curve equation, and then controls the opening of the electric flow regulating valve and the opening and closing of the two or more electromagnetic valves, so that the oxygen concentration value detected by the oxygen analyzer (5) is consistent with the oxygen concentration value corresponding to the given altitude value.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5988161A (en) * 1997-09-11 1999-11-23 Kroll; Mark W. Altitude adjustment method and apparatus
CN102491277A (en) * 2011-12-22 2012-06-13 合肥恒诚智能技术有限公司 Intelligent low-oxygen generating device system and control method
CN102895746A (en) * 2012-10-25 2013-01-30 北京超思电子技术股份有限公司 Auxiliary respiring equipment
CN205999012U (en) * 2016-08-24 2017-03-08 广东欧格斯科技有限公司 Oxygenerator flow control assembly and oxygenerator
CN206096977U (en) * 2016-07-19 2017-04-12 西藏营成环境科技有限公司 Control system of plateau disperse oxygenerator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5988161A (en) * 1997-09-11 1999-11-23 Kroll; Mark W. Altitude adjustment method and apparatus
CN102491277A (en) * 2011-12-22 2012-06-13 合肥恒诚智能技术有限公司 Intelligent low-oxygen generating device system and control method
CN102895746A (en) * 2012-10-25 2013-01-30 北京超思电子技术股份有限公司 Auxiliary respiring equipment
CN206096977U (en) * 2016-07-19 2017-04-12 西藏营成环境科技有限公司 Control system of plateau disperse oxygenerator
CN205999012U (en) * 2016-08-24 2017-03-08 广东欧格斯科技有限公司 Oxygenerator flow control assembly and oxygenerator

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