In recent years, the rapid development of China's economy, people's living standards continue to improve, the number of private cars has grown rapidly, has entered thousands of households, become the most important means of transportation. Parking Spaces in many cities have been unable to meet people's needs, so in many buildings, large shopping malls, office buildings and other places have begun to build underground garages to reduce people's demand for parking Spaces. However, many underground garages are semi-closed, so the harmful substances produced can not be well discharged, but also affect the health of residents. More importantly, in the semi-closed condition, the occurrence of fire and other emergencies can not discharge harmful substances, and even threaten the safety of people's lives. Therefore, when building underground garage, the most important is to install ventilation and smoke exhaust system.

1. Overview of underground garage ventilation and smoke exhaust system

The underground garage is generally half closed, the exhaust gas from the car can not be easily discharged. Carbon monoxide is the main component of garage exhaust gas.

The purpose of garage smoke prevention and exhaust is to play the role of smoke exhaust in the event of a fire, so as to quickly eliminate residual smoke when the fire occurs, prevent the diffusion of smoke, ensure the safety of personnel and vehicles from the fire scene, reduce unnecessary losses and casualties.

2. Characteristics of underground garage ventilation and smoke exhaust system

The ventilation and smoke exhaust system of the underground garage generally has the following characteristics: garage fire partition and smoke partition area is large, according to the relevant provisions, it can be known that the limit of the basement fire partition construction is 1000 square meters, the limit of the smoke area is 500 square meters.

3. Underground garage ventilation design principle Underground garage should build a ventilation system on each fire partition, which can also play the role of introducing fresh air. It can not only reduce the concentration of harmful gases in the underground parking garage, but also save energy.

4. Smoke control and exhaust system of underground garage

Smoke control and exhaust system is the general name of smoke control and exhaust system. Smoke control system adopts mechanical pressurized air supply mode or natural ventilation mode to prevent smoke from entering the evacuation channel system; Smoke exhaust system a system that uses mechanical smoke exhaust or natural ventilation to exhaust smoke outside a building. It is composed of air supply and exhaust pipe, pipe well, fire valve, door switch equipment, air supply, exhaust fan and other equipment. Pay attention to the position between the air supply and exhaust vents to prevent short circuit of air flow.

The fire resistance and heat insulation performance of utson smoke prevention and exhaust special insulation glass wool meet the requirements of GB51251 "Technical Standard for Building smoke prevention and exhaust System"; Advanced centrifugal production technology is fully utilized to make glass wool with uniform ultra-slender fiber and extremely low slag ball content. With excellent fire performance, A1 class high performance non-combustible material; Has good thermal insulation effect, small thermal conductivity; Uniform slender fiber, with excellent sound absorption and noise reduction performance; Anti-aging and durability; Effectively inhibit the breeding of microorganisms, healthy and environmental protection.