According to the design principle, the respirator is divided into air breathing apparatus and oxygen respirator.

The working time of the air breathing apparatus is generally 30~360min, according to the different types of breathing apparatus, the maximum value of protection time is different. Generally speaking, the protection time of the air breathing apparatus is slightly shorter than that of the oxygen respirator.

Air breathing apparatus is used for fire fighting, fire fighting, rescue and rescue and rescue work under various conditions of smoke, poisonous gas, steam or hypoxia.

Oxygen breathing apparatus, also known as isolated compressed oxygen respirator. The respiratory system is isolated from the outside, and the instrument and the human body respiratory system form the inner loop, which is provided with oxygen by the high pressure gas cylinder.

Folding by use

The widespread use of respiratory protection articles according to use can be divided into work respirator and escape respirator (commonly known as gas masks).

The working apparatus can be divided into positive pressure air breathing and positive pressure oxygen respirator.

Escape type breathing apparatus can be divided into fire filtering type self rescue breathing apparatus and chemical oxygen self rescuing respirator.

Their work principle and its advantages and disadvantages