Electronic air oxygen mixer and control method thereof

The gas mixing, regulation, heating, and monitoring system of the electronic air-oxygen mixer enables precise control of oxygen concentration and temperature, solving the problems of inaccurate oxygen concentration and condensation formation in ECMO systems, and improving the safety and efficiency of the system.

CN122399604APending Publication Date: 2026-07-17THE FIRST AFFILIATED HOSPITAL OF JINAN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
THE FIRST AFFILIATED HOSPITAL OF JINAN UNIV
Filing Date
2026-05-25
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing air-oxygen mixers in ECMO systems have low precision in oxygen concentration control and a high probability of condensation formation, which affects the effective working state of the oxygenator and patient safety.

Method used

An electronic air-oxygen mixer is used, which includes a gas mixing system, a gas conditioning system, a gas heating system, a gas monitoring system, and a control system. It mixes a single compressed oxygen source with an active air extraction component, monitors the mixture in real time using the gas monitoring system, and performs joint closed-loop control through the control system to ensure precise regulation and heating of oxygen concentration, flow rate, and temperature.

Benefits of technology

It improves the accuracy of oxygen concentration control, reduces the probability of condensation in the gas path, keeps the gas path unobstructed, improves carbon dioxide removal efficiency and oxygen diffusion efficiency, and ensures the safe and stable operation of the ECMO system.

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Abstract

The present application relates to an electronic air-oxygen mixer and a control method thereof, comprising a shell and a gas mixing system, a gas adjusting system, a gas heating system, a gas monitoring system and a control system arranged in the shell; the gas mixing system comprises an oxygen input assembly, a driven air suction assembly and a mixing cavity; the gas adjusting system is electrically connected with the control system and is used for adjusting the oxygen concentration and the total flow of the output mixed gas; the gas heating system is arranged between the gas output end of the shell and the oxygenator gas inlet, is electrically connected with the control system and is used for heating the mixed gas; the gas monitoring system is electrically connected with the control system and is used for monitoring the actual oxygen concentration, the actual flow and the actual temperature of the mixed gas; the control system is used for performing joint closed-loop control on the actual oxygen concentration, the actual flow and the actual temperature according to the first deviation value, the second deviation value and the third deviation value, so that the oxygen concentration control accuracy can be improved and the condensation probability of the gas circuit can be reduced.
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