In most cases, the source of interference cannot be ruled out. Therefore, we can only consider from the perspective of reducing the impact of interference.
First of all: reasonable installation and standard wiring. According to incomplete statistics, 70% of false alarms of fire detectors are caused by unreasonable installation. Therefore, the correct selection of the type of fire detector, and the correct installation and wiring in accordance with the relevant technical instructions and specifications are the keys to reducing the impact of interference. For example, when the relative humidity is greater than 95% RH for a long time, there is a large amount of dust, smoke and steam are trapped under normal circumstances, and it is not suitable to install temperature-sensitive fire detectors in the kitchen, boiler room, generator room, tea room, garage and other places. In actual applications, it is not difficult for us to find some examples of errors, such as: installing smoke detectors above electric water heaters or installing them in air ducts or air chambers. The false alarm rate caused by these situations is very high, so it is very important to choose the correct fire detector according to the actual location.
Then there is the determination of the installation location. For example: the horizontal distance from the detector to the edge of the wall beam should not be less than 0.5m; there should be no obstructions within 0.5m around the detector, etc. If the detector is installed in a room with supply air and return air ducts, the detector should be installed on the path of the air flow to the return air outlet. Performing a smoke test will help determine the correct installation location of the detector, and special attention should be paid to the direction and path of the smoke. When the detector must be installed near the air outlet, a certain distance must be maintained. These provisions not only ensure that the detector can effectively and quickly detect the occurrence of a fire, but also an effective way to avoid interference.
