Air-oxygen mixed control breathing machine and control method

Abstract

The invention relates to an air-oxygen mixed control breathing machine and a control method. The breathing machine comprises an oxygen path, an air path and an oxygen and air mixing chamber. The oxygen path and the air path are connected to the oxygen and air mixing chamber. A gas outlet of the oxygen and air mixing chamber is provided with a gas outlet pressure sensor. An oxygen flow regulating valve, an oxygen flow sensor and an oxygen closure member are arranged on the oxygen path. The oxygen path is further provided with a core controller and a driving circuit. The core controller, the driving circuit, the oxygen flow regulating valve and the oxygen flow sensor are connected in sequence to form a loop. The oxygen flow sensor and the driving circuit can feed back oxygen flow and voltage to the core controller respectively, and a double-closed-loop control system based on flow and voltage feedback can be formed. A draught fan, an air pressure regulating valve, an air flow sensor and an air closure member are arranged on the air path. According to the air-oxygen mixed control breathing machine and the control method, an oxygen valve is controlled through the double-closed-loop control system based on oxygen flow and voltage, the regulating speed is high, and precision is high.

Description

technical field

[0001] The invention relates to an air-oxygen mixing controlled ventilator and a control method, belonging to the technical field of ventilators. Background technique

[0002] In modern clinical medicine, the ventilator, as an effective means of artificially replacing the spontaneous ventilation function, has been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support treatment and emergency resuscitation. It occupies a very important position in the field of modern medicine. Ventilator is a vital medical equipment that can prevent and treat respiratory failure, reduce complications, save and prolong the life of patients.

[0003] During the use of the ventilator, the patient must be mechanically ventilated. For the patient being treated, the control of the ventilation volume and the adjustment of the oxygen concentration are very important, especially for infants and critical...

Examples

Embodiment 2

[0134] The difference between this embodiment and embodiment 1 is:

[0135] In this embodiment, the core controller processes the feedback actual oxygen flow rate F1 and the feedback voltage u1 as follows:

[0136] When the patient starts to inhale and the deviation between the actual oxygen flow F1 and the target oxygen flow f1 is greater than the allowable range, the output oxygen flow will be adjusted;

[0137] First, the real-time detected voltage feedback U s , when U s with U s-1 When the deviation is large, the output of the core controller d(k)=c×(U s -U s-1 ), where c is the adjustment coefficient; where: U s-1 It is the feedback voltage value recorded when the actual oxygen flow F1 and the target oxygen flow F1 are stable within the deviation range within the last inspiratory time;

[0138] After the above adjustments, when U s with U s-1 When the deviation is within the allowable range, record the output at this time as D s ; At this time, the output of the...

technical field

[0001] The invention relates to an air-oxygen mixing controlled ventilator and a control method, belonging to the technical field of ventilators. Background technique

[0002] In modern clinical medicine, the ventilator, as an effective means of artificially replacing the spontaneous ventilation function, has been widely used in respiratory failure caused by various reasons, anesthesia respiratory management during major surgery, respiratory support treatment and emergency resuscitation. It occupies a very important position in the field of modern medicine. Ventilator is a vital medical equipment that can prevent and treat respiratory failure, reduce complications, save and prolong the life of patients.

[0003] During the use of the ventilator, the patient must be mechanically ventilated. For the patient being treated, the control of the ventilation volume and the adjustment of the oxygen concentration are very important, especially for infants and critical...

Examples

Embodiment 2

[0134] The difference between this embodiment and embodiment 1 is:

[0135] In this embodiment, the core controller processes the feedback actual oxygen flow rate F1 and the feedback voltage u1 as follows:

[0136] When the patient starts to inhale and the deviation between the actual oxygen flow F1 and the target oxygen flow f1 is greater than the allowable range, the output oxygen flow will be adjusted;

[0137] First, the real-time detected voltage feedback U s , when U s with U s-1 When the deviation is large, the output of the core controller d(k)=c×(U s -U s-1 ), where c is the adjustment coefficient; where: U s-1 It is the feedback voltage value recorded when the actual oxygen flow F1 and the target oxygen flow F1 are stable within the deviation range within the last inspiratory time;

[0138] After the above adjustments, when U s with U s-1 When the deviation is within the allowable range, record the output at this time as D s ; At this time, the output of the...

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