Different From Air Respirators And Oxygen Respirators

Oxygen respirator is a self-contained, closed breathing protection device, which by the cylinder of compressed oxygen gas supply, exhaled gas from the respiratory channel prefabricated drugs to remove carbon dioxide and then enter the breathing process, recycling. Because oxygen is a combustion-supporting gas, open-circuit oxygen breathing apparatus is generally not used for emergency rescue operations on fire. Oxygen respirator cylinder capacity commonly used for 1 ~ 3L, so small size, light weight, long protection time, the general protection time of up to 2 ~ 4h, the protection time is much longer than the air respirator and gas mask, which is oxygen The outstanding advantages of the respirator.
Air respirator is a self-contained, open breathing protection equipment, which consists of a comprehensive plate, air supply valve, pressure reducing valve, medium pressure pipe, high pressure cylinders and backplane and other components.
The working principle of the positive pressure air respirator is that the high pressure air stored in the high pressure cylinder is decompressed by the pressure reducer into the middle pressure chamber, and the medium pressure air enters the supply valve through the medium pressure pipe, and the air supply valve responds to the user The breathing requires the provision of breathing gas. In the inspiratory, under the action of negative pressure, the air supply valve will clean the air to a certain flow into the human lungs; breath, the valve to stop the gas supply, exhaled gas through the exhalation valve on the mask discharge, thus forming a Complete breathing process. In the whole process of breathing, because the work of the valve on the one hand by the chamber pressure balance control, on the other hand by the spring pressure adjustment, the air supply valve air flow is always greater than or equal to the air flow inhaled. So regardless of the inhalation speed, the air delivered through the supply valve always keeps the positive pressure inside the mask, thus preventing the entry of external air.