Having a fire is always a serious accident, it often leads to severe damage. To protect people's life and work safety, preventing fire incidents has become an important issue in people's daily lives.
In large volume spaces like the large workshop of the factory, for the building is rather high, the production equipment in it is large, and there are lots of shelters on the roof, the conventional fire detection systems won’t be able to function well in it. The conventional fire detection systems, such as the smoke detection systems and heat detection systems, can’t be installed in places that are too high. For example, the maximum installation height of the smoke detector is 12m. And even if the height of a large workshop is lower than 12m, its volume is still relatively large, by the time the smoke gets to the roof, its concentration has already been diluted, and the detector may not be able to detect the smoke and give alarm in time. Expect for the height of a large workshop, things like the obstructions in it and the sensitivity of the detectors also can affect the detection of the conventional fire detection systems.
Applying aspirating smoke detection (ASD) systems in large workshops can overcome the disadvantages of conventional fire detection systems. First, the aspirating smoke detection system is very sensitive to smoke. Even if the smoke from the fire is diluted because of the large space, the detector can still catch the change of smoke concentration and give alarms. Second, the aspirating smoke detection system can detect smoke actively, different from the conventional smoke detection system which can only detect smoke passively. Third, the sampling pipes of the aspirating smoke detection system can be installed flexibly according to the possible position of smoke. It can detect whether the air inside the protected area is changing, therefore discovering the dangerous situation early.
Advantages of Aspirating Smoke Detection System
Solving the problem of smoke stratification
When the sun shines down on the large workshop, there will be a hot layer formed under the roof, causing a smoke stratification. If the layer is hotter than the smoke, it will stop the smoke from reaching the conventional fire detection system mounted on the top.
The aspirating smoke detection system contains two parts: the aspirating smoke detector and sampling pipes. Other than under the roof, the sampling pipes can also be installed along the flowing path of the smoke, such as in a vertical direction.
Solving the problem of smoke dilution
Due to large spaces and air conditioning systems, smoke in large open areas will be diluted during its flow. In order to detect it, the detection system needs to be able to reach far. The beam smoke detector is the common detection device used in such places, but it is still not sensitive enough, it needs to wait until the fire has reached a serious level before it can detect it.
The aspirating smoke detection system collects air samples actively through the sample ports on the sampling pipes. It detects the total amount of smoke from each sampling pipe and gives early alarms due to its sensitivity.
Maintenance of aspirating smoke detection system mounted high
All detection systems need regular maintenance and testing. In large spaces, it can be very difficult to maintain the conventional smoke detection system mounted high, it usually needs special equipment and professionals, which is expensive and dangerous. Maintaining the infrared beam smoke detector is also expensive, and it needs to be reset after maintenance. Different from the above two devices, the aspirating smoke detection system can be installed in places that are easy to reach and maintain if required.
The white pipe indicated in the picture above is the sampling pipe of the aspirating smoke detection system. The aspirating smoke detection system can also be installed on the wall, and the installation height is 1.5m from the ground, which is convenient for operation and maintenance.
