The compressed air curtain is a compressed air cylinder that releases a large amount of compressed air through the air outlets of the piping to drive out toxic and hazardous gases; it is designed to prevent toxic and hazardous gases from being brought into the refuge chamber with the entry of the evacuees.

Air Purification: Air scrubbing and dehumidification systems are used to remove CO2 from the air that is breathed in by people in closed chambers over long periods of time.₂The toxic and hazardous gases are released into the refuge through the use of CO₂The catalyst is washed and filtered.

Temperature and humidity regulation system: The emergency shelter system has air conditioning facilities to control and regulate the temperature rise caused by heat sources from the external space and the body's own heat sources. The air conditioning system consists of an explosion-proof air-conditioning compressor, a freezer and a pneumatic fan. The temperature of the air inside the refuge is controlled to 33°C ± 2°C.

Main functions, components and main technical parameters of environmental monitoring

It is used to collect and analyze ambient gases (O₂, CO, CO₂CH₄The refuge is monitored for concentration, temperature, humidity and pressure. This allows the refuge occupants to understand and identify the disaster environment, and to organize self-rescue measures according to the condition of the equipment inside the refuge, in order to maximize the safety of the people in danger. In order to facilitate intrinsic safety and access to the user's existing system, the O-ring is installed in the refuge.₂, CO, CO₂CH₄Sensors such as differential pressure, temperature, humidity, etc. and their sub-stations can be selected from the supporting equipment of the user's existing system.

The refuge is equipped with a direct telephone line to the mine's dispatch office and can be connected to the underground broadcasting system to ensure maximum communication security during a disaster. Personnel location monitoring substations and dispatch telephones can be installed as part of the user's existing system.

In order to create a good living environment for the evacuees and to ensure their health and safety, the refuge is equipped with chairs, stretchers, first aid kits, food, drinking water, toolboxes, fire extinguishers and signage.

Routine maintenance time frame: 6 months maintenance.

Rated strength: 100/80/40 persons

Rated protection time: 96h

Start-up time: <30s;

Continuous high temperature resistance: ambient temperature 35°C

Observation window: 150mm in diameter

Oxygen supply system: pressurized air oxygen supply system, compressed oxygen supply system, oxygen concentration 18.5%~23.0%

Pressurized air system: Utilize the interface of the mine's pressurized air system. Pressure reduction, throttling, muffling, filtering (filtering out oil, water, etc.). The outlet pressure is 0.1-0.3MPae per capita air supply is not less than 0.3m/mine continuous noise is not more than 70dB(A)

Transition room air curtain: air curtain spray time >2min/group; flow rate >100L/(min-person)

Air purification and cooling dehumidification system: carbon dioxide absorption capacity>0.5L (min-person), carbon dioxide absorption capacity: from 400ppm to 24ppm within 20min, carbon dioxide≤1.0%, CO≤24ppm, CH4≤1.0% body temperature<33℃.

Internal air circulation system: flow rate above 20L/min.

Diagnostic indoor environmental monitoring parameters: CO, CO2, CH4, 02, temperature, humidity, differential pressure

Transition room environmental monitoring parameters: CO, O2

Dong outdoor environment monitoring parameters: CO, CO2, CH, 0, temperature

Communication system: wired and wireless communication

Food equipment: not less than 5000KJ/person-day, edible water 1500mL/person-day