Analysis of Respirator Types: From Passive Filtration to Active Ventilation

1.Self-priming filtering respirator (passive protection)
Principle: By relying on the user's own breathing force to overcome the resistance of the filter material, dust in the air is filtered.

Common types: Disposable KN95 masks, replaceable half masks/full face masks.

Advantages: Lightweight, low cost, simple to operate.
Limitations: The breathing resistance increases as the dust load on the filter cotton increases, which can lead to fatigue; the facial sealing requirement is extremely high, and it is prone to leakage due to issues such as shaving or facial shape.

2. Electric forced-air respirator (PAPR, Active Protection)

Principle: Through a battery-powered fan, the environment air is actively drawn in, purified by the efficient filter box, and continuously sent into the mask to create positive pressure inside the mask.
Representative equipment: DaYu PAPR filtering electric-powered air supply respirator.
Core Strengths:
Zero breathing resistance: The active air supply completely eliminates the breathing burden, significantly reducing lung fatigue. It is especially suitable for high-intensity work.
Higher protection safety: The continuous positive pressure inside the mask can effectively prevent external contaminants from entering due to facial movements or sudden leaks.

Excellent comfort: Continuous air supply provides a cool and dry breathing experience and can prevent the lenses from fogging up, improving the compliance for long-term wearing.

Wider face shape adaptability: The positive pressure design reduces the reliance on absolute facial sealing, making it more suitable for workers with beards or special facial shapes.