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A.1.2 Summary
This ventilator is pneumatic-controlled. In the designing of the ventilator, we strive for the
high accuracy, high frequency and intelligent. The ventilator will control the value of
oxygen and the air flow according to the preset value, trough the entire airway pipe, the
mechanical ventilation is completed. According to the functions, the ventilator system is
divided into four parts: the inspiratory module, expiratory module, PEEP controlling
module and patient circuit.
1. Inspiratory module
1) The gas supply inlet and controlling module——import gas supply from the
pipeline or cylinder to the ventilator, and provide stable gas flow.
2) The gas flow controlling module——control the air and oxygen flow separately
through the solenoid proportional valve in order to reach the pre-set ventilation
standard.
3) The gas mixer and safety valve system——realize that the air and the oxygen is
mixed evenly, and deliver the mixed gases to the patient through the inspiration
port. At the same time, when the patient’s airway pressure is much higher, the
safety releasing valve immediately opens to release the excessive pressure so
as to protect the patient” s lung from excessive pressure. The emergency
10
Free breathing valve
25
Gas resistor
11
Air filter
26
Zero calibration valve
12
Safety valve
27
Nebulization On/Off valve
13
Oxygen sensor
28
Gas resistor
14
Inspiratory pressure
sensor (P)
29
Zero calibration valve
15
Humidifier
C3
Inspiratory port
C1
O2 inlet
C4
Expiratory port
C2
Air inlet
