What are the factors that affect the use time of air respira
Source: Dongtai Rongxing Release date:2020-08-27 14:45 Views
The use time of air respirators is closely related to the user’s usage and environment. The difference in the user’s gas consumption and work intensity will affect the use time of the positive pressure air respirator. The use time of positive pressure air breathing apparatus mainly considers the following aspects:
1. The labor intensity of the user. The use time of the positive pressure air respirator is also inconsistent with the difference in the amount of labor. For example: weight-bearing climbing, running, walking slowly, etc., different exercise methods affect the use time of positive pressure air respirators.
2. The user's own physical factors, the use time of the positive pressure air respirator is also related to the user's weight, physical condition, lung capacity, use experience, exercise volume, breathing rate, whether the mask fits closely to the face and the cylinder Whether the prescribed pressure is reached at the beginning of use is of great importance.
3. The user’s psychological factors are affected by their own excitement, fear or other psychological pressure.
4. The factor of the positive pressure air breathing apparatus is whether the gas in the cylinder is sufficient at the beginning of use. Some positive pressure air breathing apparatus may cause fogging, which may hinder the user's vision. For example, in the firefighting and rescue process, the use of positive pressure air respirators by firefighters for a long time will cause the mask to produce water mist. Firefighters often use cylinder air to defog, which will also consume the gas cylinder volume.
5. Atmospheric pressure in the use environment. For example: if used in an environment of 2 atmospheres (such as a pressurized tunnel or box), the use time is half of 1 atmosphere, if it is used under 3 atmospheres, the use time is 1 atmosphere One third of it.
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