How long can air respirator supply?

When purchasing an air respirator, one of the most common questions is how long it can be used for breathing. The standard cylinder size found in many air respirators is 6.8 liters. This size is chosen because larger cylinders are heavier, which can cause fatigue during rescue operations or daily tasks, reducing work efficiency. The theoretical usage time for a 6.8-liter air respirator is approximately 68 minutes. However, this time can vary significantly depending on factors such as lung capacity, physical exertion, individual health, and psychological state. In practice, the user can typically expect at least 45 minutes of use.

1. Physical Fitness:

Before testing, it's important to assess the user's lung capacity. By comparing this with the performance of the air respirator, it becomes clear that individuals with smaller lung capacities tend to use the device for longer periods, while those with larger lung capacities may exhaust their oxygen supply more quickly. A study comparing athletes with similar endurance levels found that those with smaller lung capacities often had slimmer body types, suggesting that under similar conditions, a smaller lung capacity can result in extended usage of the air respirator. Additionally, when comparing individuals of the same height and weight, those with higher lung capacities were found to have better physical fitness in activities like running and jumping, yet they showed shorter usage times with the respirator. This indicates that even with good physical fitness, a larger lung capacity may not always translate into longer use.

2. Psychological Quality:

Psychological research has shown that people often experience anxiety, nervousness, or panic in dangerous situations. These emotional responses can lead to increased heart rate and faster breathing, resulting in higher oxygen consumption than usual—regardless of whether the person consciously controls their breathing. In contrast, individuals with strong psychological resilience or those who have undergone mental training tend to remain calm after an initial shock. Their heart rate and breathing gradually return to normal, allowing them to use the air respirator for a longer period. Therefore, personnel with better psychological qualities are likely to get more out of their air respirator in high-stress environments.

In conclusion, when physical conditions are comparable, individuals with smaller lung capacities and smaller body sizes tend to use air respirators for longer durations. Additionally, those with better psychological resilience can extend their usage time significantly. Understanding these factors helps users make informed decisions about equipment selection and proper training to maximize the effectiveness of their air respirators.

This article is a reprint from online media. It only represents the author’s opinion and does not necessarily reflect the views of this site. If any content infringes on your rights, please contact us, and we will handle it promptly.