Design of Automatic Liquid Injection System of Ventilator Humidifier
Objective To design a ventilator humidifier that can monitor the level of the wetting tank in real time and automatically inject liquid on demand.Methods Firstly, the optical level sensors were respectively installed at the wetting tank side 3.2 and 3.8 cm level, which was used to monitor the wet tank liquid level. Then, the peristaltic pump was installed in the humidifier main unit, which could inject liquid into the wetting tank by regularly squeezes liquid pipe and control the high and low state of the liquid level at the optical liquid level sensor.Results When the wetting tank level was less than 3.2 cm, the peristaltic pump started and begined to fill the liquid, when the liquid level rised to 3.8 cm, the peristaltic pump stoped working, which could control the wetting tank liquid level between 3.2 to 3.8 cm.Conclusion The humidifier controls the wetting tank liquid level in the desired ranges, so as to achieve the best heating and humidification effects for patients inhaling gas and improve the quality of artificial airway care.
wetting tankoptical liquid-level sensorlevel controlinhaled gas temperature and humidity effect
国家科技期刊平台
NSTL
万方数据
维普
