Suzhou Qiao Hui HVAC introduction: The installation and precautions of the underground garage air duct

General underground garage integrated pipe network, integrated wiring and basement net height installation requirements: pipeline comprehensive and reasonable arrangement, reduce detour and crossover; Similar pipelines merge paths as far as possible, which is not only beautiful, but also can reduce the support and hanger, but also can reduce the chance of cross collision.

Among them, the construction sequence of the beamless floor pipeline is: air duct -- heating -- fire protection -- high voltage bridge -- special bridge for residents' power distribution -- public bridge

Construction sequence of the negative first-floor well beam area: air duct -- heating -- fire -- high voltage bridge -- special bridge for residential power distribution -- public bridge

The construction sequence of the negative two floors of the garage: air duct -- fire -- public bridge

The general thickness of the air duct of the underground garage is 400mm, and it should be installed in the middle area of the two columns to ensure that other pipelines have space to avoid. The air duct tuyere should be positioned and opened after the installation of all equipment pipelines. There should be no pipes, Bridges and other obstructions under the tuyere.

The smoke exhaust system of the underground garage mainly includes: smoke exhaust outlet → air pipe → smoke exhaust fire valve → silencer plenum → fire smoke exhaust (exhaust air) fan → muffler → check valve → machine room shaft → single-layer rain shutters → outdoor

The exhaust system of the underground garage mainly includes: exhaust gas induced fan → exhaust outlet → fire valve → silencer plenum → fire smoke exhaust fan → muffler → check valve → machine room shaft → single-layer rain shutters → outdoor

Basement air duct installation precautions

1. The underground garage should be equipped with air supplement and air intake systems at the same time; When the smoke protection zone leads directly to the outside and there is no fire roller curtain, the exit can be used as the air conditioner

2. The requirements and calculations of air room, shaft, plenum and muffler are the same as those of smoke exhaust and exhaust system

3. The air speed of the outlet should not be greater than 4m/s. Avoid inhaling large volumes of debris, dust, etc

In addition, the smoke exhaust duct material of the underground garage should meet the requirements of fire smoke exhaust.

If the metal air duct is used, the smoke exhaust wind speed should not be greater than 20m/s, and the smoke exhaust duct height should not exceed 400mm to avoid insufficient headroom in some pipeline collection areas.