The pneumatic part of the ventilator consists of compressed air and oxygen, compressed air and oxygen in the air-oxygen mixer according to the requirements of the oxygen concentration ratio and fully mixed by the filter, warming humidifier, etc. to supply the patient, the schematic diagram is as follows:
Supply of compressed air for respiration as a respiratory gas directly on the patient's role in the life-support system, the importance of the imaginable, the stability of the compressed air, gas quality requirements are extremely high, so the front-end air supply system must meet the requirements of use. Stability of compressed air, gas quality requirements are extremely high, so the front-end gas system must meet the requirements of the use of specific reference GB 50751-2012 "Medical Gas Engineering Technical Specification", the specific value of the following table:
So for the medical air gas system is generally selected oil-free, if you take into account the factors of ambient air pollution, you need to increase the de-oiling equipment, and in addition to the water treatment generally use a cold dryer. Water treatment is generally used in the combination of cold dryer + suction dryer, and then configure a multi-stage precision filter to remove particles. For CO and airborne bacterial pollutants, you can choose to use catalytic oxidation combustion class of oil removal purifier, can be in the purifier of the high temperature environment of the air in the bacterial inactivation, coupled with the process of de-oiling can also be effective will be CO combustion, can play a role in removing the oil, sterilizing, and in addition to the multiple utility of CO.