The design principle of respirator

According to the design principle, respirators are generally divided into air respirators and oxygen respirators.

The working time of air respirator is generally 30-360min, and the maximum limit of protection time is different depending on the type of respirator. In general, the protection time of air respirators is slightly shorter than that of oxygen respirators.

Air breathing apparatus is used for firefighters or rescue personnel to safely and effectively carry out fire fighting, rescue and rescue work in various environments such as dense smoke, poisonous gas, steam or hypoxia.

Oxygen breathing apparatus is also called isolated compressed oxygen breathing apparatus. The respiratory system is isolated from the outside world, and the instrument forms an internal circulation with the human respiratory system. Oxygen is provided by a high-pressure cylinder, and an airbag stores the gas during exhalation and inhalation.