Test device and test method for response performance of fire detectors in low temperature environment

Abstract

The invention relates to a test device and test method for the response performance of a fire detector in a low-temperature environment. The test device includes a test box, a refrigerator, a combustion furnace, and a measurement and control system for the entire device. The two ends of the refrigerator are connected to the test box. The two ends of the body are respectively connected by the cold air connection pipe and the hot air connection pipe to form a closed-loop air circulation loop. The air inlet side of the test box has a smoke inlet, and the combustion furnace has a smoke outlet. The smoke outlet passes through the smoke The pipe is connected with the smoke inlet, and the fire detector to be tested is installed in the test box; the measurement and control system includes a smoke and dust optical density meter, a temperature and humidity meter, an anemometer and a measurement and control host. This method can measure the fire response ability of point type smoke detectors in low temperature environment, and provide scientific basis for correctly evaluating the fire detection ability of fire detectors in low temperature environment.

Description

technical field [0001] The invention belongs to the technical field of fire detector performance testing, and in particular relates to a test device and a test method for the response performance of a fire detector in a low-temperature environment. Background technique [0002] At present, the application of fire detectors has been very popular all over the world. It realizes early detection of fires by detecting early fire products such as smoke, temperature rise and certain gases, so as to realize timely fire fighting. In some application scenarios, such as some ancient buildings, parking lots, warehouses, etc. in northern my country, fire detectors may operate in cold environments, and the lowest temperature may reach minus 20 degrees. In this case, whether the fire detector can have the same fire detection capability as that at normal temperature is a matter of great concern to users, manufacturers and researchers. [0003] The national standard GB4715-2005 "Point Smoke...

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Problems solved by technology

However, this test does not consider testing the fire response performance of fire detectors in low temperature environments.

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