HGJY240 chemical oxygen respirator for work and rescue is a respiratory protective equipment designed for long-term rescue scenarios. It was jointly developed by SAFE-PRO and CASIC. It adopts aerospace passive air regeneration technology and applies SAFE-PRO’s high-end protection standards for intelligent manufacturing. The chemical oxygen production principle is used to convert the carbon dioxide exhaled by the human body into recycled use, which is not limited by the external environment. Through innovative multi-stage cooling coupling, efficient gas reaction control technology, and long-term chemical oxygen production principle, it achieves the characteristics of low temperature, low resistance, and low carbon dioxide, and can predict the remaining capacity of the displayed agentia. It has functions such as intelligent control, personnel status monitoring, and mask head display prompts, providing safe, efficient, and comfortable respiratory protection for operators.