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目的提出一种呼吸机潮气量检测设备的等温容器制作方法。方法通过向一定体积的密闭容器内注入气体,测量容器内部压强与温度的变化,依据理想气体状态方程精确计算注入气体的体积。为了使注入气体时容器内部恒温,向容器内部填充细铜丝,以吸收因空气压缩而产生的热量。结果细铜丝填充量至少为300 g/L、注入气体在100 m L以内时,可认为1 L容器内部达到等温状态。将实验系统接入呼吸机,比较测量潮气量值与设定潮气量值,实验误差在2%以内,证明实验的精确性。结论建立用于检测呼吸机潮气量等温容器模型,可以精确检测呼吸机的通气量,为呼吸机通气量的出厂检测提供理论依据和数据支持,为临床呼吸机的通气性能检修提供更多选择。
Objective To propose a method of making isothermal containers for ventilator tidal volume testing equipment. Methods The volume of injected gas was accurately calculated by injecting gas into a closed container with a certain volume and measuring the pressure and temperature inside the container. In order to keep the inside of the container constant when gas is injected, a thin copper wire is filled into the container to absorb the heat generated by the air compression. Results A minimum of 300 g / L of fine copper wire was filled. When the injected gas was within 100 m L, the interior of the 1 L vessel was considered to be isothermal. The experimental system is connected to the ventilator to compare the measured tidal volume with the tidal volume, the experimental error is within 2%, which proves the accuracy of the experiment. Conclusion The establishment of a isothermal container model for the detection of tidal volume of ventilator can accurately detect ventilator ventilation and provide theoretical basis and data support for the ventilator ventilator factory inspection, which provides more options for the ventilation performance of clinical ventilator.