Closed-loop system oxygenator and flow/concentration regulating closed-loop control system thereof

Abstract

The invention discloses a closed-loop system oxygenator. The closed-loop system oxygenator comprises an oxygen production module assembly, wherein the oxygen production module assembly comprises an initial gas source delivery device, a main gas pipe and a high-concentration oxygen preparation device; the output end of the high-concentration oxygen preparation device is connected with an oxygen flow / concentration control device; the oxygen flow / concentration control device is electrically connected with a control module; the output end of the oxygen flow / concentration device is connected with an oxygen outlet through a total flow output pipe; an oxygen flow / concentration sensor is mounted on the total flow output pipe between the output end of the oxygen flow / concentration control device and the oxygen outlet; the sensor is electrically connected with a control module. The invention further provides a flow / concentration regulating closed-loop control system of the closed-loop system oxygenator. The oxygenator disclosed by the invention is controlled by the closed loop system, and has the advantages of being high in intelligent extent, capable of automatically and accurately regulating parameters of oxygen output, low in cost, long in service life, and good in user experience.

Description

technical field [0001] The invention belongs to the technical field of oxygen generators, and in particular relates to a closed-loop system oxygen generator and a flow / concentration adjustment closed-loop control system thereof. Background technique [0002] Oxygen generators currently on the market are generally composed of oxygen generator system components, control devices, and monitoring devices. The gas flow adjustment of the oxygen production system is controlled by glass rotameter or small hole fixed value of solenoid valve. [0003] The use of glass rotameter control has the following disadvantages: [0004] 1: The rotameter flowmeter must be manually rotated to adjust the flow rate, and must be installed vertically, so electric control cannot be realized, and remote control and intelligent remote control cannot be used. [0005] 2: The readings displayed by the floating ball, the control accuracy and the display accuracy are very poor, and the float will vibrate o...

AI Technical Summary

Problems solved by technology

[0004] 1: The rotameter must be manually rotated to adjust the flow rate, and must be installed vertically, so it cannot be electronically controlled, and cannot be controlled by remote control or intelligent remote control.

[0005] 2: The readings displayed by the float, the control accuracy and the display accuracy are very poor, and the float will vibrate or even produce abnormal noise due to the unstable output gas volume

[0006] 3: The oxygen concentration of the gas cannot be adjusted actively, and the oxygen concentration can only be changed passively with the flow change

[0007] 4: When the output gas volume exceeds the oxygen volume of the oxygen generator, the service life of the molecular sieve of the oxygen generator will be greatly reduced

[0008] 5: Adding the atomization function requires an additional interface, and using the atomization function will reduce the service life of the molecular sieve of the oxygen generator

[0010] 1: The fixed value of the solenoid valve microhole controls the flow rate, which requires a set of solenoid valves to realize, which is expensive and has a complex gas path structure

[0011] 2: The adjustment range is small, each additional solenoid valve can increase a gear, and precise adjustment between gears cannot be achieved

[0012] 3: Through a group of parallel solenoid valves to close the corresponding small holes in the air path to control the flow, the control accuracy and display accuracy are very poor

[0013] 4: The oxygen concentration of the gas cannot be adjusted actively, and the oxygen concentration can only be changed passively with the change of the flow rate

[0014] 5: The displayed data are all preset values, there is no feedback correction system, the actual output is often inconsistent with the adjusted display data

[0015] 6: Adding the atomization function requires an additional interface, and using the atomization function will reduce the service life of the molecular sieve of the oxygen generator

[0016] At the same time, although some oxygen generators are equipped with monitoring devices, the monitoring information is only displayed on the display panel for users to know, and is not fed back to the control device for data processing and parameter adjustment. Oxygen machines are all open-loop systems, and cannot automatically calibrate and adjust various oxygen parameters. The intelligence is low and the user experience is not good.

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