Oxygen concentration control device of intelligent type breathing machine

Abstract

The invention relates to an intelligent breathing machine oxygen concentration control device, which comprises an oxygen passage, an air passage, and a PLC control system. The oxygen passage and the air passage are respectively provided with a filter, a pressure maintaining valve, an air source pressure pickup, a holding valve, a ratio adjusting valve, and a flow sensor. The communicated mixed gas of the output end of the oxygen passage and the air passage is delivered into patients. A switching magnetic valve is arranged between the oxygen passage and the air passage which is provided with a Venturi. The control device controls the switching magnetic valve by the PLC control system to realize the switching work of the lower end and the high end of oxygen concentration, and replaces the work of an air compressor by the Venturi in the higher state of oxygen concentration or when the air compressor breaks down, thus avoiding the air compressor to be used for long time, prolonging the service life thereof, increasing the safety performance of the breathing machine and providing the safety control for patients.

Description

technical field [0001] The invention relates to a ventilator, in particular to an intelligent ventilator oxygen concentration control device. Background technique [0002] The oxygen concentration of the gas delivered by the ventilator is an important indicator for ventilating the patient. In the existing clinically used air-oxygen mixing ventilator, the oxygen concentration can be adjusted between 21%-100%. In order to correct the patient’s hypoxic condition as soon as possible, combined with treatment, the oxygen concentration needs to be adjusted to a certain level, relying on compressed air and high-pressure oxygen to adjust according to the ratio set by the ventilator. If one of the gas channels is interrupted, only the other gas can be output. . When the oxygen circuit is interrupted, it can only output the air of another route; when the air circuit is interrupted, it can only output 100% oxygen, which will cause the patient to inhale a large amount of pure oxygen an...

AI Technical Summary

Problems solved by technology

If the oxygen circuit is interrupted, only the other air can be output; if the air circuit is interrupted, only 100% oxygen can be output, which will cause the patient to inhale a large amount of pure oxygen and die of poisoning for a long time.

The reason why the ventilator cannot operate normally and the patient is poisoned by pure oxygen is generally due to the air compressor being used for a long time and easily damaged after frequent maintenance, and the air compressor is noisy, poor in reliability, and short in service life during use. Once the air compressor fails, it will cause harm to the patient, so that the safety performance of the ventilator cannot be guaranteed

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