Experimental Study on Condensation of Air Sampling Smoke Detector in Frozen Warehouse Environment

Abstract

This study analyzed the problems of a fire detection system based on the actual conditions of domestic frozen warehouses and conducted a reappearance experiment to address these issues. The adaptability of spot-type thermal and smoke detectors is reduced in locations where extremely low or low temperatures are maintained. Air sampling smoke detectors are used in frozen warehouses; however, condensation and freezing occur on the pipe, which serves as the detection part of the air sampling smoke detector, blocking the suction hole of the pipe. Based on the results of a re-enactment experiment, frost visible to the naked eye was observed after 132 h of the experiment. After the entire period, it was confirmed that most of the solidification occurred in zone 1. Depending on the spatial characteristics, condensation and freezing can occur in pressure controllers or heating wires with defrosting functions.